Robert Scarlata
"The REHIT program accelerates progress. The built in programming and recording of events creates the ideal feedback loop. It’s amazing how two 20 second blitz sprints can wear you out and the effect it has on VO2 progression."
CAROL Bike vs other bikes
CAROL Bike gives you the shortest, most effective workouts—backed by science. It’s the world’s first home REHIT exercise bike. Delivering the same results as a 45-minute run—in just 5. See how CAROL compares to other bikes below.
How CAROL compares vs other bikes
CAROL Bike was built to make optimal health and fitness easier for everyone. With science-backed workouts proven to deliver results—and save you time.
| Workouts | CAROL BIKE | PELOTON BIKE + | PELOTON BIKE |
|---|---|---|---|
| REHIT – most effective cardio backed by science | |||
| Automated zone-based training | |||
| Virtual outdoor rides and races (e.g. Zwift) | |||
| Studio cycling classes | |||
| Time to get or stay fit per week | From 15 minutes | From 75 minutes | From 75 minutes |
| Software | CAROL BIKE | PELOTON BIKE + | PELOTON BIKE |
|---|---|---|---|
| Continuously optimized & personalized workouts | |||
| Compatible with cycling apps (e.g., Zwift, Kinomap, Rouvy) | |||
| Compatible with entertainment & news apps (e.g., Netflix, Youtube, Disney+) | |||
| Precise fitness tracking | |||
| Safety algorithms |
| Hardware | CAROL BIKE | PELOTON BIKE + | PELOTON BIKE |
|---|---|---|---|
| EN ISO 20597 certification | Class SA professional and commercial use | Class H domestic use | Class H domestic use |
| Silent belt drive | |||
| Frictionless magnetic brake | |||
| Computer controlled, motorised brake system | |||
| Freewheel safety clutch | |||
| Heart rate monitor included | Optional extra | Optional extra | |
| Screen size, resolution, processor power, memory, storage |
11” 2000x1200 65.4 GFLOPS 6 MB 128MB |
24” 1920x1080 42.5 GFLOPS 4 MB 16 MB |
24” 1920x1080 8.3 GFLOPS 2 MB 16 MB |
| Cost | CAROL BIKE | PELOTON BIKE + | PELOTON BIKE |
|---|---|---|---|
| Initial purchase price | £2,065.29 | $1,995** | $1,445** |
| Shipping | à partir de $99 | Included | Included |
| Assembly | £299 | Included | Included |
| Monthly membership | $19.99 | $49.99** | $49.99** |
| Customer Care | CAROL BIKE | PELOTON BIKE + | PELOTON BIKE |
|---|---|---|---|
| Risk free trial | 100 days | 30 days | 30 days |
| Trustpilot rating | 4.5 | 2.9** | 2.9** |
**As of 27 August 2026
What makes CAROL Bike special?
The shortest, most effective workouts
Our signature REHIT workout creates the most potent training stimulus with just 2×20-second sprints. It’s scientifically proven to deliver double the health and fitness benefits compared to normal exercise—in 10% of the time.
Personalized to your fitness and goals
CAROL Bike’s AI-personalization means it’s suitable for any age and any fitness level. Our AI learns to push you to your limit, applying automatic and instant resistance, to ensure your workouts are most effective for you.
Significant results in just 8 weeks
CAROL Bike is scientifically proven to improve your VO2max by 12%—in just 8 weeks. That’s like turning the clock back on your age by 10 years.
Join our 35,000+ rider community
Read real reviews from riders who’ve experienced CAROL’s benefits themselves.
Candace McCabe
"I noticed a problem with my bike a few days after setting it up. I called into customer service and received a call back immediately with full instructions, pictures and easy troubleshooting. Thanks Carol for a great experience.”
Omid Vojdani
“I love my Carol bike, and the results I’ve been getting with it, even a few times a week, have been amazing. Legs are stronger and more stable, and I don’t feel so much like an old man going up stairs anymore!”
Everett Myers
“This will help anyone get into the habit of exercising and will also support high performance athletes in reaching higher levels of strength and fitness. I recommend the purchase of CAROL without any hesitation!”
Scott
“I was skeptical about doing high-intensity REHIT three times per week. Just two 20-second sprints each session. Now, I’m seeing amazing increases in power output and fitness levels.”
Loved by our community
Hear how our community of scientists, fitness thought leaders and self-optimizers get the most out of CAROL every day.
A former first responder’s journey with CAROL Bike
Hear how busy entrepreneur and Holistic Weight Loss coach, Joel Evan, keeps fit and healthy using CAROL Bike.
“Most Innovative Exercise Bike 2022”
As awarded by Garage Gym Reviews, the #1 trusted home gym equipment review site.
A CrossFitter’s perspective—Michael Kummer
The healthy living and tech enthusiast on why CAROL makes him a better athlete.
“I’m excited about a different way to train on a bike.”
Strength influencer Colin Jenkins reviews CAROL Bike for ‘Connect the Watts’.
Good habits start here
Order CAROL Bike now, try it for yourself—and build a habit that lasts.
100-Day Home Trial
Try CAROL Bike at home for 100 days. And if it’s not for you, return it and get a refund.
Fast Delivery
Delivery is from $99. If you live in États-Unis continentaux, get your new CAROL Bike delivered to your door.
0% Financing
You can buy your CAROL Bike with Affirm. And pay just $232.92/month at 0% APR.
Frequently asked questions
How does CAROL Bike work?
CAROL Bike was developed with leading exercise researchers to deliver the shortest, most effective workouts. Our signature REHIT workout creates the most potent training stimulus with just 2×20-second sprints. It’s scientifically proven to deliver superior health and fitness benefits compared to normal exercise—in 90% less time.
What is REHIT?
Reduced Exertion HIIT (REHIT) is an optimized form of High Intensity Interval Training (HIIT) that’s more effective than conventional exercise — with a much shorter time commitment. This helps you achieve maximum fitness in the minimum time.
CAROL is the only fitness equipment that makes it possible to do REHIT workouts at home. Find out more about the science of REHIT here.
Is CAROL Bike good for beginners?
CAROL Bike is for all exercise levels based on adaptive AI technology. The bike will push you based on your current fitness level, so you can get the most out of the workout. It doesn’t matter if you’ve never worked out, haven’t worked out in 2 years, or work out every day. The bike will adapt to your level and push you to your max.
Can I link other streaming services to my CAROL Bike?
You can connect to apps like Peloton, Zwift, YouTube, Netflix and more. You can also pair with Apple Watch via Heartcast.
How much does CAROL Bike cost?
CAROL Bike is £2,065.29, with Home membership at $19.99 a month.
Do I need a membership to use CAROL Bike?
Yes, with a membership you’ll unlock all the features of your CAROL Bike, including AI-personalized workouts, with instant resistance for maximum results.
What is your 100-day home trial offer?
You can return your CAROL Bike, no questions asked, within 100 days from delivery.
If you live in the États-Unis continentaux, mainland Canada or UK it is free to return your bike and you will be issued a full refund, excluding charges for room of choice delivery and assembly.
Real riders, real results.
All rider reviewsFitness score 49.2 · +9%
I’ve been training for a half marathon and since adding CAROL Bike to my daily routine in the past 2 weeks, my VO2max has gone up 5% already.
Fitness score 36.3 · +52%
My CAROL Bike has been great to help me achieve greater fitness and power without the time investment but with all the fun!
Fitness score 41.6 · +12%
In just 4 months, my VO2max has increased by about 12 points, and my heart rate has decreased by 10 bpm. For someone with a history of heart issues, these improvements are huge!
From the community.
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It clears my head completely.
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Join our 35,000+ rider community.