Sample page. This shows how Gym Ninja will look at launch. The product, specs and RRP are real, taken from the brand’s own site. Live retailer prices, price history and alerts arrive once our retailer partnerships are in place. More sample pages
Wattbike Proton
RRP £1,799 (the brand’s price, from Wattbike: Proton product page (full price; on offer at £1,649 when checked), checked 9 Oct 2026). Live retailer prices coming soon.
Will it fit?
Measure the floor space you have. We check it against the brand’s own figures (and any clear space the brand asks for), either way round. Pure arithmetic: nothing is estimated.
Specs
| Length in use | Up to 125 cm (Wattbike's frame length; it gives the footprint as 102 × 57 cm)Source: Wattbike: Proton product page, checked 9 Oct 2026 |
|---|---|
| Width in use | 57 cm (frame width)Source: Wattbike: Proton product page, checked 9 Oct 2026 |
| Height in use | Up to 127 cmSource: Wattbike: Proton product page, checked 9 Oct 2026 |
| Folds or stands upright | Unknown |
| Stored length | Unknown |
| Stored width | Unknown |
| Stored height | Unknown |
| Clear space behind (brand's guidance) | Unknown |
| Clear space each side (brand's guidance) | Unknown |
| Ceiling height (brand's guidance) | Unknown |
| Product weight | 48 kg (50 kg boxed)Source: Wattbike: Proton product page, checked 9 Oct 2026 |
| Max user weight | 135 kgSource: Wattbike: Proton product page, checked 9 Oct 2026 |
| Noise (brand's figure) | Unknown |
| Resistance type | Electromagnetic, 22 gears; automatic resistance changesSource: Wattbike: Proton product page, checked 9 Oct 2026 |
| Max power | 0–1,800 W (±1% accuracy)Source: Wattbike: Proton product page, checked 9 Oct 2026 |
| App compatibility | Wattbike Hub (free, no subscription); any ANT+ FE-C or Bluetooth FTMS app, including Zwift, ROUVY, TrainerRoad, FulGaz and MyWhoosh. No screen included: you use your own phone, tablet or computerSource: Wattbike: Proton product page, checked 9 Oct 2026 |
| Connectivity | ANT+ (FE-C), Bluetooth (FTMS)Source: Wattbike: Proton product page, checked 9 Oct 2026 |
| Heart-rate input | Unknown |
| Power supply | Mains power adapter (included)Source: Wattbike: Proton product page, checked 9 Oct 2026 |
| Warranty | 2 years (Wattbike's "2 Year Guarantee")Source: Wattbike: Proton product page, checked 9 Oct 2026 |
Our verdict
- Who it suits
- Households sharing one bike: Wattbike says it fits riders from 4′6″ to 6′6″ and adjusts without tools. You get accurate power figures, automatic resistance, Wattbike's Hub workouts free, and it works with Zwift, ROUVY, TrainerRoad and other ANT+ FE-C or Bluetooth FTMS apps. At 57 cm it's the narrowest bike in our sample pages.
- Who should look elsewhere
- You want a screen built in: there isn't one, so you'll ride with a phone, tablet or laptop. It needs a mains socket, weighs 48 kg, takes riders up to 135 kg (the AtomX and Air-Pro take 150 kg), and Wattbike doesn't give a noise figure.
Gym Ninja verdict, 9 Oct 2026
Price history
Not enough price history yet.
From our own daily checks of each retailer’s feed, in stock or not.