Public Alpha · No Signup
Connect your smart trainer and race a banked indoor track from your browser - drafting, pace tiers, and live multiplayer. Free public alpha, no signup.
How it works
A nickname plus height and weight - used only to model your speed from your power.
Pair your smart trainer or power meter - heart-rate and cadence too, if you have them.
Choose a mode and pace tier, or jump into a live multiplayer room.
Pedal to set your speed; use the left and right arrow keys to move up and down the track.
Real drafting physics
Sitting on one wheel saves up to 38% of your effort — the wind-tunnel figure — but the shelter stacks down a paceline: tuck third or fourth in line and partial drafts from every rider ahead add up toward ~57%, with diminishing returns at the back, exactly as team-pursuit aerodynamics measure it. Even the rider in front gains a little from a wheel glued behind. It stays speed-aware — nothing at a crawl (below ~14 km/h), decisive at race pace, reaching further back the faster you go — and fades to clean air within about five bike-lengths. Gap, line, and where you sit in the train all count, so holding the wheel is a genuine skill — and the same model runs identically for you and the AI. (Barry et al., 2015; Blocken et al., 2018; Broker et al., 1999; Kyle, 1979; McCole et al., 1990; Olds, 1998)
The web ride pairs sensors over Web Bluetooth, which runs in Chrome, Edge, Opera, or Brave on a desktop or laptop with Bluetooth switched on. Safari, Firefox, and mobile browsers can't pair smart-trainer sensors - open this page on a computer to ride.
This public alpha is for riding right now - your ride sessions are not saved, and there is no post-ride analysis yet. Both are planned for a later release.