What CAROL Bike does

CAROL Bike, a brand of UK-registered Integrated Health Partners Limited, designs and sells an AI-powered exercise bike purpose-built for Reduced Exertion HIIT (REHIT). Its proprietary hardware combines a heavy-duty steel frame, forged steel cranks, a composite flywheel, and an AI-controlled motorized magnetic brake system that applies precise resistance instantly at the moment required - a capability the company states is not replicable with conventional bikes. The bike runs Android 13 on an 11.5-inch 2K touchscreen with WiFi 6E, Bluetooth 5.2, and Dolby Atmos, supporting Google Play apps, OTA updates, and Apple Watch integration via Heartcast. The platform executes 5-minute REHIT sessions of 2x20-second all-out sprints and the AI algorithm personalizes resistance in real time based on each rider's history and live performance.

The company operates a hardware-plus-subscription business model. The CAROL Bike 2.0 retails at $2,795 per unit with optional paid assembly, Affirm 0% APR financing, and HSA/FSA payment via Flex. Recurring revenue comes from CAROL Home Membership ($19.99/month for up to 8 riders), CAROL Premium Membership ($59.99/month for the first member, with Les Mills+ Premium access and 1:1 coaching), and CAROL Commercial Membership (from $49/month for 24+ riders at gyms and studios). Revenue is generated primarily through direct-to-consumer e-commerce (delivering in 7-14 days across US, Canada, and UK) complemented by a field sales motion targeting commercial operators, with payment partners including Affirm and Klarna reducing upfront purchase friction.

The company serves time-poor professionals, biohackers and longevity optimizers, commercial gyms and studios, older adults and post-injury recovery users, and athletes seeking cross-training cardio. Marketing is anchored on a science blog, the REHIT peer-review portfolio, high-profile endorsements (Dave Asprey, medical doctors, athletes), earned media (Wired, Men's Health, FT, Vice, Forbes), and a stated community of 30,000-35,000+ riders. The company has approximately 11-50 employees with offices in London (registered) and Decatur, GA (US headquarters), is privately held, and was founded by Ulrich Dempfle (current co-founder and CPO per leadership record; in some sources reflected as CEO).

Name

CAROL Bike

Legal name

Integrated Health Partners Limited

Website

https://carolbike.com

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

11–50 employees

Short description

CAROL Bike designs and sells an AI-powered exercise bike purpose-built for 5-minute Reduced Exertion HIIT (REHIT) workouts, selling direct-to-consumer plus a growing commercial gym tier across the US, Canada, and UK via $2,795 hardware and recurring memberships.

Ownership category

akta.pro rank

Product category

Smart Exercise Bikes

NAICS

Motorcycle, Bicycle, and Parts Manufacturing (336991)

SIC

Motorcycles, Bicycles & Parts (3751)

akta.pro primary industry

Bike Online Retail & Omnichannel Specialists (CRAMAHAL)

akta.pro secondary industry

Cycling & Bike Retail (Sales, Service & Accessories) (CRAMABAH)

Keywords

• Smart exercise bike
• AI fitness equipment
• REHIT training bike
• Home cardio equipment
• Connected fitness platform

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Marketing or Sales, Personnel

Revenue model

1. Hardware Sales — CAROL Bike: One-time purchase of the CAROL Bike unit at $2,795 (US price). This is the primary revenue driver and the entry point for all other revenue streams. Optional add-ons include Heart Rate Armband ($149), Heart Rate Chest Belt ($79), and Phone Holder ($59).
2. CAROL Home Membership: Monthly subscription at $19.99/month providing AI-personalization, 24+ science-backed workouts, personalized fitness dashboard, access for up to 8 riders, OTA updates, and member support. This is a recurring revenue stream with cancel-anytime terms.
3. CAROL Premium Membership: Premium tier at $59.99/month for first member ($49.99/month for each additional Premium member). Includes all Home membership benefits plus: regular 1:1 personal coaching with a CAROL expert, Les Mills+ Premium access (2,500+ workouts), premium bike protection (faults and accidental damage coverage for CAROL Bike 2.0 within warranty), and priority support. Land-and-expand model as additional household members upgrade.
4. CAROL Commercial Membership: Bespoke monthly subscription plans for gyms and studios starting from $49/month for 24+ riders. Includes all platform features plus additional user profiles, dedicated customer success manager, commercial-use warranty, gym dashboard, big-screen leaderboard, booking system, marketing assets, and referral incentive scheme.
5. Paid Assembly Service: Optional paid delivery and full assembly service at $299 for customers who want professional setup of their CAROL Bike.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels8 records

Core offering

CAROL Bike designs, manufactures, and sells an AI-powered smart exercise bike purpose-built for Reduced Exertion HIIT (REHIT) workouts — 5-minute sessions consisting of 2x20-second all-out sprints that deliver fitness benefits equivalent to a 45-minute run. The company sells the bike hardware (CAROL Bike / CAROL Bike 2.0) directly via its e-commerce site at $2,795, plus tiered subscription memberships (Home $19.99/mo, Premium $59.99/mo, Commercial from $49/mo for 24+ riders), and accessories (heart rate chest belt, armband, phone holder). The offering combines proprietary motorized magnetic brake hardware, on-bike AI resistance personalization, and OTA-updated workout software integrated with Zwift, Peloton Digital, Kinomap, Rouvy, and LES MILLS+.

Product overview

CAROL Bike offers a unified product ecosystem centered on its AI-powered exercise bike with REHIT (Reduced Exertion HIIT) protocol. The core CAROL Bike and CAROL Bike 2.0 provide the hardware platform, while subscription tiers (Home, Premium, Commercial memberships at $19.99-$59.99/month) unlock software features including AI personalization, 24+ science-backed workouts, and performance analytics. Accessories (Heart Rate Chest Belt, Armband, Phone Holder) extend functionality. Premium membership adds Les Mills+ content library and personal coaching. The system integrates with third-party fitness apps (Zwift, Kinomap, Rouvy, Peloton Digital), entertainment platforms (YouTube, Netflix, Disney+), and payment providers (Affirm, Klarna, Flex for HSA/FSA).

Differentiator

Problem solved

Functional benefit

Products and services

• CAROL Bike (CAROL Bike 2.0) AI-powered smart exercise bike purpose-built for Reduced Exertion HIIT (REHIT) workouts. Features a proprietary AI-controlled motorized magnetic brake that applies instant, precise resistance during 2x20-second all-out sprints within ~5-minute sessions, delivering equivalent fitness benefits to a 45-minute run. Includes an 11.5-inch 2K IPS touchscreen, Android 13 with Google Play Store, WiFi 6E, Bluetooth 5.2, quad speakers with Dolby Atmos, commercial-grade steel frame, composite flywheel, and AI-personalized resistance calibration. Priced at $2,795 with a 100-day risk-free home trial and 5-year frame warranty; intended for individual adult consumers seeking time-efficient, evidence-based cardio.
• CAROL Home Membership Monthly subscription at $19.99/month unlocking the AI-personalization engine, 24+ science-backed workouts, personalized Fitness Score dashboard, up to 8 rider profiles per household, OTA updates, and member support. Sold to individual consumers as the core software layer for the CAROL Bike hardware.
• CAROL Premium Membership Premium subscription tier priced at $59.99/month for the first member and $49.99/month for each additional Premium member. Includes all Home membership features plus regular 1:1 personal coaching with a CAROL expert, LES MILLS+ Premium content library (2,500+ workouts across strength, mobility, and mindfulness), premium bike protection for CAROL Bike 2.0, and priority support. Sold to individual households seeking coaching and full content library access.
• CAROL Commercial Membership Bespoke monthly subscription for gyms, health clubs, and studios starting from $49/month for 24+ riders. Includes all platform features plus additional user profiles, dedicated customer success manager, commercial-use warranty, gym dashboard, big-screen leaderboard, booking system, marketing assets, and a referral incentive scheme. Sold to commercial fitness operators via direct sales.
• Heart Rate Chest Belt Wireless heart rate monitoring accessory included free with new CAROL Bike orders and available standalone for $79. Provides accurate heart rate data during workouts to feed the AI personalization engine.
• Heart Rate Armband Optional heart rate monitoring armband providing real-time heart rate tracking during workouts, sold as an add-on accessory for $149.
• Phone Holder Optional accessory for securing a phone during workouts, sold as a hardware add-on for $59.

Quantifiable outcome

• 12% VO2max improvement in 8 weeks (3×5-minute REHIT sessions per week)
• +13 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration15 records

AI capability4 records

Feature9 records

Partnerships

Two partnerships are on record, tiered core.

• Dave Asprey / Bulletproof / Upgrade LabscoreGTM or Marketing PartnerDave Asprey, the father of biohacking and founder of Bulletproof and Upgrade Labs (the world's first Human Upgrade Centers), endorses CAROL Bike as the ultimate cardiovascular exercise hack in his book 'Smarter Not Harder.' CAROL Bikes are installed at all Upgrade Labs facilities. Asprey appears on the CAROL website and podcast hub as a key community advocate, with dedicated promotional pages and discount code (DAVE, $100 off).
• LES MillscoreTechnology or IntegrationLES Mills+ Premium library of 2,500+ science-backed workouts (strength, mobility, mindfulness) is included with CAROL Premium membership. Premium members receive a personal login to LES Mills+ apps and website, accessible on the CAROL Bike touchscreen and other devices (up to 3 concurrent devices).

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Peloton: Connected-fitness incumbent offering indoor bikes and treadmills with subscription content. Broader portfolio than CAROL but directly overlaps in smart exercise bikes and monthly fitness subscriptions, including in the time-efficient workout messaging.
• NordicTrack (iFit): Long-established connected-fitness brand offering bikes, treadmills, and rowers with iFit streaming subscription. Competes for the same at-home cardio buyer as CAROL with broader portfolio and retail presence.
• Bowflex: Connected home fitness brand offering bikes, treadmills, and strength equipment with subscription content. Competes for the same home cardio equipment buyer as CAROL, generally at lower price points.

Direct peers

• Hydrow: Premium connected rowing machine with immersive training content and a subscription model. Comparable to CAROL as a premium-priced, content-subsidized home cardio machine targeting affluent, time-conscious consumers.
• Aviron Interactive: Connected rowing machine combining gaming-style content and competitive features with a subscription. Targets similar 'make cardio fun and habit-forming' value proposition as CAROL with a hardware + subscription model.

Emerging players

• Ergatta: Connected rowing machine with gamified, performance-driven training content. Closely comparable DTC-and-subscription model with a similar premium positioning and direct-to-consumer sales motion.
• Zwift: Virtual indoor cycling platform integrated with CAROL Bike itself. Comparable as a virtual, gamified training experience and a monthly subscription revenue model — Zwift represents both a partner and a competing engagement surface.
• Wahoo Fitness: Smart indoor cycling trainers (KICKR) and accessories with app ecosystem (Wahoo SYSTM). Comparable as a high-end smart cycling hardware brand serving time-efficient training-focused cyclists and triathletes.

Regional players

• Tonal: Premium connected strength-training system with subscription content. Comparable premium DTC positioning and AI-personalized training model, though focused on strength rather than cardio.
• MYZONE: Heart-rate-based training platform with wearable and gym integrations. Comparable on the AI/personalization and habit-formation dimensions, particularly in commercial gym settings where CAROL's Commercial membership is positioned.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/thecarolbike
• YouTubeyoutube.com/c/CAROLbike
• Facebookfacebook.com/thecarolbike
• LinkedInlinkedin.com/company/thecarolbike
• Instagraminstagram.com/thecarolbike

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds1 record

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CAROL Bike