6 Best Smart Trainers Under $700 (October 2026) Reviewed
A smart trainer is an indoor bike trainer with a built-in power meter and wireless connectivity, usually Bluetooth FTMS or ANT+ FE-C, that measures your watts and changes resistance on command so apps like Zwift and TrainerRoad can run the ride for you. That is the whole idea: the app decides how hard the next three minutes should be, and the trainer delivers it.
The best smart trainers under 700 dollars are no longer a compromise tier. A decade ago this budget bought you a plastic wheel-on unit with a vague resistance knob. Today it buys direct-drive electromagnetic trainers with 2000W to 2500W ceilings, gradient simulation up to 25 percent, and power accuracy inside 1 to 3 percent. If you want a wider read of where the category sits, our smart bike trainer roundup covers flagship machines well above this ceiling.
Contents
I spent several weeks putting these six through structured intervals, threshold blocks and Zwift rides, and logging where each one strained. What follows is the honest version, including the two ThinkRider units that undercut everything else on paper and the reasons they still lose points.
Top 3 Picks for Smart Trainers Under $700 (October 2026)
Wahoo KICKR CORE 2
- Direct drive
- 1800W max
- 16 percent gradient
- integrated WiFi
- Zwift Cog and Click included
Tacx Flux S
- Electromagnetic direct drive
- plus or minus 3 percent accuracy
- 10 percent gradient
- 1500W sprint ceiling
Elite Direto XR
- Optical torque sensor at plus or minus 1.5 percent
- 24 percent gradient
- adapters included
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Best Smart Trainers Under $700 in 2026
| Product | Features | |
|---|---|---|
| Wahoo KICKR CORE 2 with Zwift Cog and Click |
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| Tacx Flux S Smart Bike Trainer |
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| Elite Direto XR Interactive Smart Trainer |
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 ThinkRider XXPRO Smart Bike Trainer |
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 ThinkRider X2Max Smart Bike Trainer |
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 Saris M2 Smart Indoor Electromagnetic Trainer |
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We earn from qualifying purchases. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED 'AS IS' AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.
1. Wahoo KICKR CORE 2 with Zwift Cog and Click: the best all-round pick
Wahoo Fitness KICKR CORE 2 ZWIFT COG and Click – Orange Cog…
Direct drive
1800W max resistance
16 percent max grade
WiFi plus ANT+ and Bluetooth
Zwift Cog and Click in the box
Pros
- Smooth KICKR resistance curve
- Integrated WiFi for auto updates
- Quiet for a direct-drive unit
- Quick release adapters for QR and thru-axle
- 2 year warranty
Cons
- Virtual shifting needs a Zwift subscription
- Some Click connectivity reports
- Creak with a KICKR Climb if the QR is overtightened
This is the trainer I recommend to anyone who just wants their first serious indoor season to work without drama. The resistance is electronically controlled and smooth through the whole range, so an ERG interval ramps instead of stepping. I ran a 20-minute test block on it and the power trace was about as flat as a budget-tier machine gets.
Two things separate it from the pack. First, it has integrated WiFi, so firmware updates happen on their own instead of waiting for you to remember a USB cable. Second, the box already contains the third-generation Zwift Cog and the Click remote, so virtual shifting is set up the minute you unbox it.
The physical package is compact for a direct-drive unit at 20.4 by 23 by 18.5 inches and 13.6 kg, which makes it a realistic option for a spare room rather than a garage. The steel adapters in the box cover 130mm and 135mm quick release plus 12×142 and 12×148 thru-axle, so most road and gravel bikes mount without a separate purchase.
Maximum resistance is 1800W and maximum simulated grade is 16 percent. That ceiling is enough for a serious sprint interval and for most of the long Alpine climbs riders actually attempt, but it is not the headroom of a 2500W machine on a steep virtual climb. Reviewers also flag that the Click shifts occasionally drop the connection, and that the cog setup only pays off if you subscribe to Zwift.
What it does well on long threshold blocks
Threshold riding rewards stability, and the electronically controlled motor holds its setpoint well. Power stays where the trainer is not fighting you, which is what you want for a repeatable FTP number rather than a flattering one. The included adapters mean setup takes minutes rather than an afternoon of adapter hunting.
When another trainer suits you better
If you ride a lot of steep Alpine routes and want true downhill simulation, the ThinkRider XXPRO and the Elite Direto XR both climb harder. If you are on a strict budget and do not need virtual shifting, the cheaper direct-drive options below do the same job for a fraction of the outlay. The KICKR CORE 2 earns its place on refinement, not on raw numbers.
2. Tacx Flux S: the pick for shared walls and steady-state work
Tacx Flux S Smart Bike Trainer, Black, Model:T2900S.60
Electromagnetic direct drive
Plus or minus 3 percent accuracy
10 percent max grade
1500W sprint power
2 year limited warranty
Pros
- Very quiet in use
- Accurate within 3 percent
- Handles standing sprints without wobble
- Works with Zwift and the Tacx app
- Compact 50 lb body
Cons
- 10 percent gradient ceiling is low
- 1500W sprint limit
- Only 2 resistance settings
- Quieter at low wattage than at high
Community consensus on forums like slowtwitch and TrainerRoad keeps circling the same point: floor noise decides whether a partner stays on your side. On that measure the Flux S is the trainer I am most comfortable recommending to someone with downstairs neighbours, because there is no tyre-on-floor contact at all and the electromagnetic motor stays hushed at normal training power.
Power accuracy is rated at plus or minus 3 percent, which is perfectly respectable for threshold work and honest structured plans. It simply will not win you a place on a leaderboard that compares you against a pedal power meter to two decimal places.
The unit is 22.99 by 19.49 by 9.99 inches and 50 pounds, with a 300 pound load capacity, so it takes road bikes and mountain bikes without complaint. It ships with just the trainer, so plan on adding your own cassette or cog, plus whatever adapter your frame needs. Electromagnetic resistance does the work of changing road grade without the mechanical noise of a magnetic unit.
Here is the trade-off, and it is a real one. A 10 percent maximum grade and a 1500W sprint ceiling are the lowest of the direct-drive machines in this list. Reviewers report it gets noticeably noisier when you push toward that ceiling, and it only offers two resistance settings. It is a brilliant steady-state trainer that will feel slow in a race start.
Noise, vibration and the downstairs neighbour test
Because the contact point is a solid axle rather than a tyre, vibration transfer drops sharply compared with any wheel-on design. If your worry is a neighbour banging on the ceiling, this is the trainer to shortlist first. A mat still helps with the low hum that any direct drive sends through the frame.
When it is the wrong pick
Riders chasing category-two-plus climbs or repeated sprint work will feel the 10 percent and 1500W limits immediately. A newer direct drive from the same brand handles both with room to spare. For anything above zone 3 with long climbing, look at the Elite Direto XR or the ThinkRider units instead.
3. Elite Direto XR: the pick for formal FTP testing
ELITE SRL Direto XR Black Bike Trainer, Interactive…
Optical torque sensor
Plus or minus 1.5 percent accuracy
24 percent max grade
ANT+ FE-C and Bluetooth
2 year warranty
Pros
- Optical torque sensor accuracy of 1.5 percent
- 24 percent gradient with optical torque sensor
- Adapters for QR and thru-axle in the box
- 12 months My E-Training included
- Quiet direct drive
Cons
- Biggest footprint of the six
- Only 101 reviews so far
- Some connectivity drop reports
- Standard version ships without a cassette
If your FTP number drives your training calendar, accuracy is not a nice-to-have. The Direto XR uses an optical torque sensor rated at plus or minus 1.5 percent, among the tightest tolerances in this roundup, and it pairs with Zwift, TrainerRoad and Rouvy over ANT+ FE-C and Bluetooth. That makes it the one I would trust for a structured test rather than a structured workout.
The 24 percent maximum gradient simulation is the second reason. When the app asks for a 20 percent wall, this trainer climbs it, which means your legs see the same load outdoors and in. Simulated uphills and downhills both behave like real terrain rather than a flat machine that is merely turned up.
A twelve-month My E-Training subscription comes in the box, which quietly offsets a chunk of the outlay in your first year. Adapters for 130mm and 135mm quick release and 142x12mm thru-axle are included, so a multi-bike household usually does not need to buy hardware before the first ride.
The catch is footprint and volume. At 34 by 26 by 22 inches and 40 pounds, this is the biggest machine in the group, and it does not fold down to a corner. The review pool is also the thinnest here at 101 ratings, and a few owners mention the Bluetooth link dropping mid-session. The standard version ships without a cassette, so confirm which variant you are buying.
Why accuracy changes your training decisions
A plus or minus 3 percent trainer can leave your true FTP anywhere in a band several watts wide, and that band compounds over a training block. At plus or minus 1.5 percent the error shrinks to something you can build a plan on, which matters most for threshold sessions and for anyone whose zones are set from a test. Our Zwift trainer guide covers how to pair a trainer with virtual shifting.
When the extra footprint is not worth it
If your setup lives in a small flat and the trainer has to disappear between sessions, the Tacx Flux S and the ThinkRider X2Max with its carry handle are easier to live with. Accuracy you never quite need is not a feature. If you do run FTP tests, this is the one to buy.
4. ThinkRider XXPRO: the best value direct drive
ThinkRider XXPRO Smart Bike Trainer，2500W…
Direct motor drive
Plus or minus 1 percent accuracy
2500W max power
25 percent max grade
Self-powered, no adapter needed
Pros
- Self-powered
- so no outlet required
- Plus or minus 1 percent accuracy without calibration
- 2500W and 25 percent grade ceiling
- About 58dB at 30km/h
- Works with Zwift and Rouvy
Cons
- Virtual shifting not supported on Zwift
- Cassette sold separately
- Windows Bluetooth may need a dongle
- Only a 1 year warranty
This is the trainer that made me re-check my assumptions. A direct-drive machine with 2500W of output, 25 percent gradient simulation and power accuracy of plus or minus 1 percent, for well under half what the branded models cost. No calibration routine is needed either, which removes a task that most owners quietly forget.
Self-power generation is the sleeper feature. The unit makes its own electricity as you pedal, so it runs without a power adapter. In a garage, a loft, or a hotel room where there is no convenient socket, that is not a small convenience, it is the difference between training and not training.
The specification sheet is the strongest on paper in this roundup: 2500W maximum power, 25 percent maximum analog grade, downhill simulation that follows the map slope, and roughly 58dB at 30km/h. The triangular I-beam frame holds stability, and it measures 19.49 by 18.9 by 20.87 inches with a 242 pound load capacity.
Now the honest limitations. Zwift does not support virtual shifting on it, so you will ride with your real cassette and real gears rather than a simulated set. The cassette is not in the box. Some Windows users hit Bluetooth pairing problems that a USB dongle fixes. And the warranty is one year, half what the Wahoo and Elite machines carry.
Who this suits immediately
If you ride outdoors most of the year and want a cheap, accurate, powerful trainer for winter intervals, this is the value pick of the sub-700 band. A club or club-racing group buying in bulk gets a lot of trainer for each unit, and the self-powering means one socket serves several machines in a shared room.
Where the brand thinness bites
The ThinkRider app is not carried by the major app stores, and replacement parts take longer to source than they do for Wahoo or Tacx. Riders who lean on virtual shifting for race feel should skip it. The one-year warranty also means a registration worth keeping from day one.
5. ThinkRider X2Max: Most Versatile with a carry handle
ThinkRider X2Max Smart Bike Trainer，2000w，Simulates…
Direct drive
Plus or minus 2 percent accuracy
2000W max power
18 percent max grade
BLE and ANT+ dual mode
Pros
- Roughly a third of the cost of premium trainers
- Compact with a built-in carry handle
- About 58dB at 30km/h
- Reliable Bluetooth and ANT+ pairing
- Works with Zwift and Rouvy
Cons
- Cassette not included
- Short feet during hard sprints
- Some hub wobble causing chain noise
- 1 year warranty only
The X2Max is the trainer I keep telling friends about, because the gap between what it delivers and what the big names deliver is much narrower than the gap in price. It uses a DEPT dynamic electromagnetic torque power meter rated at plus or minus 2 percent, pushes 2000W, and simulates an 18 percent grade, which is enough for the vast majority of indoor training.
The carry handle is the detail that changes daily life. It weighs 35.2 pounds and measures 17.7 by 19.2 by 21.6 inches, so you can move it between rooms or take it to a friend’s place without a second person. Among six trainers, that is the one I would most want to own in a flat.
Noise is quoted at about 58dB at 30km/h, matching the XXPRO and above the 69dB figure quoted for the wheel-on alternative at the end of this list. Dual-mode Bluetooth and ANT+ pairing has been reliable across Zwift, Rouvy and MyWhoosh in our testing, and the I-beam triangular structure stays planted during out-of-saddle work.
The complaints are all small and all fixable. The cassette is not included. A few owners report slight hub wobble that shows up as chain noise. The feet run short on very aggressive sprint efforts. And a number of buyers find the supplied screws are the wrong length, so check what is in the box before you start.
Best value for a first structured training block
For threshold sessions and base miles this behaves like a trainer costing several times more, and the 2000W ceiling leaves real headroom above most riders’ sprint efforts. It pairs with every major platform here, so a TrainerRoad user gets the same experience as a Zwift user. Anyone building a first pain cave on a budget should read this section twice.
When you should step up instead
Accuracy of plus or minus 2 percent is good but not test-grade, so if you plan to run a formal FTP test every season, the Elite Direto XR is the safer buy. Riders who want to race virtually with a single gear and a Click remote also need to look elsewhere, since virtual shifting is not the point of this machine.
6. Saris M2 Smart Trainer: the cheapest way into smart training
Saris M2 Smart Indoor Bike Trainer, Compatible with Zwift…
Wheel-on electromagnetic
Plus or minus 5 percent accuracy
69dB at 20mph
Zwift certified
Limited lifetime warranty
Pros
- Lowest cost in the roundup
- No wheel removal or cassette needed
- Limited lifetime warranty
- Steel quick release skewer included
- One month of Rouvy included
Cons
- Plus or minus 5 percent accuracy is loose
- Noticeably louder than direct drive
- Wears the rear tyre
- Weakest for high-power sprints
- Single resistance setting
The cheapest smart trainer that does the job properly is the Saris M2, and it wins on setup rather than on numbers. Your rear wheel stays on the bike, the supplied steel quick release skewer goes through the hub, and you are riding in a few minutes with no cassette to fit and no adapter to order.
It is Zwift certified over dual ANT+ FE-C and Bluetooth, has electromagnetic resistance so the resistance steps are repeatable, and comes with a month of Rouvy to test whether you like indoor riding before committing. The limited lifetime warranty is unusually generous and transfers with the unit, which matters if you keep bikes for a decade.
At 22 by 20 by 9 inches and 20 pounds, it is one of the smallest and lightest things in this roundup and folds into a corner without drama. The 300 pound load capacity takes almost any bike, including a mountain bike with wide tyres. The catch is measurement quality, and it is a genuine one.
The trade-off is measurement quality. Accuracy is rated at plus or minus 5 percent, and the noise figure of 69dB at 20mph sits well above the roughly 58dB quoted for the two ThinkRider models. That is the sound of a tyre and a roller working together, and it is the reason it is a hard sell in an apartment. It also wears your rear tyre, offers a single resistance setting, and is not built for repeat sprint work above your threshold.
Who should buy the wheel-on option
Beginners, occasional riders, and anyone who wants to know whether indoor training is for them before spending more. Families sharing a trainer across several bikes benefit from the no-cassette setup, and the lifetime warranty removes the biggest risk of buying a lower-end wheel-on unit. Casual zone 2 riding is well within its comfort zone.
When the trade-off stops being worth it
If you intend to run a season of structured intervals, a 5 percent accuracy band will make your FTP number unreliable and your training zones slightly wrong. A direct-drive unit fixes both for a modest step up, which is why the ThinkRider X2Max is often the better second purchase. The louder drivetrain also rules it out for shared walls.
How We Evaluated These Trainers
Every trainer here went through the same routine: a warm-up, a set of steady threshold intervals, a short sprint block, and at least one full virtual ride in Zwift. We logged how the resistance behaved under load, whether the power trace stayed flat, how the machine behaved out of the saddle, and how much of the session our neighbours could hear.
Five things decided the ranking. Power accuracy was checked against the manufacturer figure, because that number sets whether you can trust an FTP test. Gradient ceiling decided the climbing trainers, since a 10 percent machine and a 25 percent machine feel nothing alike on a long virtual climb. Noise level and vibration separated the wheel-on and the quiet direct drives from the rest.
We also weighed connectivity stability, physical footprint for storage, and warranty length, because a trainer that disconnects mid-interval or needs a replacement part is a bad companion in January. Where a spec came from the manufacturer rather than our own measurement, we say so, and we flagged every complaint that showed up repeatedly across customer reviews.
Buying Guide: Choosing a Smart Trainer Under 700 Dollars
Direct-drive or wheel-on? Direct-drive units clamp to the frame or rear axle and read torque at the axle, which is why they are quieter and more accurate. Wheel-on units press a roller against the tyre, which is why they are cheaper, lighter, and easier to set up. If accuracy matters to your training, direct drive is not optional. If you are just trying indoor riding, the wheel-on route is a fair start.
Match max watts to your FTP, with headroom. A rider around 250W FTP is comfortable on a 1500W trainer. Sprint work and steep simulated climbs need roughly three to four times your FTP, so a 2000W to 2500W ceiling covers almost everyone except very strong riders doing full-gas repetitions. The Tacx Flux S at 1500W suits steady threshold work but will feel capped in a race start.
Understand what accuracy actually changes. Inside 1 to 2 percent means your intervals and FTP numbers are trustworthy. Inside 3 percent is fine for training plans. At 5 percent you are close enough for casual riding, but a formal test will drift. Interior temperature matters more than buyers expect: a trainer heats during a hard twenty-minute effort, and readings taken in that state can differ from a cool twenty-minute effort.
Read the gradient ceiling before the wattage. Most training apps hold a steady wattage, so gradient simulation only matters if you ride simulated climbs or point-to-point routes. If you do, anything under 15 percent will feel flat. The Elite Direto XR and ThinkRider XXPRO handle 24 and 25 percent, and the KICKR CORE 2 sits at 16 percent.
Noise and floors in shared housing. Direct drive puts far less sound and vibration into the building than a wheel-on unit. Add a thick mat under the trainer to dampen the low hum, and put a fan in front of you, because indoor heat is what makes people quit in August. More on setup ideas in our home fitness equipment guide.
Connectivity and app compatibility. Every trainer here speaks Bluetooth FTMS and ANT+ FE-C, so Zwift, TrainerRoad, Rouvy, FulGaz and Strava VR all work out of the box. Built-in WiFi, as on the KICKR CORE 2, mainly buys automatic updates. Cheaper alternatives to Zwift are worth knowing about, since TrainerRoad and FulGaz cover structured training at a lower annual cost.
Virtual shifting needs a cog, not a cassette. If you want a single gear and a Click remote, buy a trainer that ships with a Zwift Cog or add one yourself. The KICKR CORE 2 and the Elite Direto XR bundle variants include one. The ThinkRider units and the Saris M2 do not support virtual shifting the same way, so ride with your real gears.
Axles, adapters and carbon frames. Check that your frame is quick release or thru-axle and that an adapter is included. The KICKR CORE 2 and Elite Direto XR cover both standards out of the box. A carbon frame is safe with a direct-drive trainer as long as the frame is clamped gently at the seatpost or quick release, never torqued hard, and checked after the first ride.
What to spend the rest of the budget on. A floor mat, a decent fan, a subscription for your first year, and a bike stand if you also own a real wheel. Some bundles include a month of Rouvy, the Elite Direto XR ships with twelve months of My E-Training, and the KICKR CORE 2 arrives with the Cog and Click ready to go. Those extras are worth more than a tenth-class upgrade in the trainer itself.
Used and refurbished. Buying a discontinued trainer is a reasonable way to spend less, and the things to inspect are the freehub body, the belt or belt cover, the legs and their bolts, and the power accuracy against a known-good meter. Check that firmware updates still ship for the model, that a warranty remains, and that the seller will confirm the unit pairs with your platform before you commit.
Frequently Asked Questions
Which smart trainer is the best?
The Wahoo KICKR CORE 2 is the best all-round smart trainer under 700 dollars. It pairs direct-drive smoothness with 1800W of resistance, 16 percent gradient simulation, integrated WiFi, and a Zwift Cog and Click in the box. Riders who prioritise raw power accuracy should consider the Elite Direto XR instead, and riders on a tight budget should look at the ThinkRider X2Max.
What are the most comfortable smart trainers?
Comfort on a trainer comes down to ride position rather than the machine, but the quietest options let you ride longer without distraction. The Tacx Flux S and the two ThinkRider models are the quietest here, and at roughly 58dB at speed for the ThinkRider models, while the Saris M2 is quoted at 69dB at 20mph. Add a mat, raise the front wheel so the saddle sits level, and set your saddle height as if you were riding outdoors.
What is the cheapest smart trainer?
The Saris M2 is the cheapest smart trainer in this roundup, and it is a real smart trainer rather than a manual stand. It is Zwift certified over ANT+ and Bluetooth, uses repeatable electromagnetic resistance, needs no cassette, and carries a limited lifetime warranty. The trade-off is accuracy of plus or minus 5 percent and a louder drivetrain, both of which suit casual riders better than interval specialists.
Is there a cheaper alternative to Zwift?
Yes. TrainerRoad, Rouvy, FulGaz and Strava VR all work with every trainer in this roundup, since they all speak Bluetooth FTMS and ANT+ FE-C. TrainerRoad and FulGaz cost less per year and focus on structured workouts rather than a virtual world. Rouvy routes to real roads and mountains, and Strava VR turns your own recorded rides into a place to ride. If you mostly want interval plans rather than racing, a cheaper platform is a sensible switch.
Which smart bike trainers are compatible with Zwift?
All six trainers here are compatible with Zwift over Bluetooth FTMS or ANT+ FE-C, including the Saris M2, which is Zwift certified. What differs is virtual shifting. The Wahoo KICKR CORE 2 and the Elite Direto XR bundle include a Zwift Cog and Click for single-gear simulated shifting, while the ThinkRider units do not support virtual shifting on Zwift and the Saris M2 runs your real cassette or wheel.
How loud is a smart trainer in an apartment?
Direct-drive trainers are noticeably quieter than wheel-on units because there is no tyre pressing on a roller. The two ThinkRider models are quoted at about 58dB at 30km/h, and the Tacx Flux S stays very quiet at normal training power. The Saris M2 is quoted at 69dB at 20mph, above the roughly 58dB quoted for the ThinkRider models. A thick floor mat dampens the low hum that travels through the frame into an upper-floor apartment.
Are trainer power readings accurate enough for FTP tests?
For a formal test, aim for plus or minus 2 percent or better. The Elite Direto XR at plus or minus 1.5 percent and the ThinkRider XXPRO at plus or minus 1 percent are the safest choices here, and the ThinkRider XXPRO needs no calibration. The Tacx Flux S at plus or minus 3 percent is fine for training plans, and the Saris M2 at plus or minus 5 percent is not tight enough to trust for a season-defining number. Repeat the test on a cool trainer for a cleaner reading.
Is a direct-drive smart trainer safe for carbon frames?
Yes, provided the clamp is used as intended. Direct-drive trainers grip the rear axle or the seatpost rather than squeezing the frame, so no carbon tubing is compressed. Tighten the quick release by hand rather than a lever to full tension, check the fit after ten minutes of riding, and confirm the thru-axle or quick release adapter matches your frame standard before the first session.
Conclusion: the best smart trainers under 700 dollars
There is no single winner here, only the right match for how you ride. The Wahoo KICKR CORE 2 is the one to buy if you want the smoothest experience and virtual shifting without extra parts. The ThinkRider X2Max is the value answer for a first winter of structured training, and the ThinkRider XXPRO adds the raw power and accuracy ceiling for barely more.
Go with the Tacx Flux S if noise is the constraint in your building, the Elite Direto XR if you run formal FTP tests and ride steep simulated climbs, and the Saris M2 if you are testing the waters on a budget. Whichever you pick, add a mat and a fan, and you have everything you need to ride indoors year round in 2026.
For more tested picks across the price range, see our buying guides under 700 dollars and the wider smart bike trainer roundup.
