Indoor riders on wheel-off or wheel-on trainers who want a level bike and a more natural feel through the bars.
The JetBlack Turn Block replaces a fixed front wheel block on your indoor trainer. It holds the front wheel at a neutral 3 cm height to suit most trainers, keeping the bike level, and its top turns up to 20° each side so the handlebars can move with you.
That small amount of movement makes long sessions on Zwift and other training apps feel more natural. Your upper body is less rigid, you can shift your weight like you would on the road, and there's less of the static strain that comes from holding one position for an hour.
It's plug and play: no assembly, no batteries and no pairing. Drop it under the front wheel and ride.
Steers with you
20° of turn either side.
Levels the bike
Neutral 3 cm front wheel height.
Plug and play
No assembly or batteries.
Works with most trainers
Suits most brands of indoor trainer.
Riser block
Rotating top
The wheel cradle turns up to 20° each way, so you can move the bars naturally while you ride.
Great for
Maybe not for
Sits under a standard road or mountain bike front wheel. The 3 cm height suits most trainers; check your trainer's rear axle height if the bike doesn't sit level.
Setting it up
Place the block on a trainer mat so it can't slide, set it under the tyre, then check the bike is level with a phone level app on the top tube. Keep your turning movements small; it's there for natural movement, not cornering. Clean sweat off the cradle now and then so the tyre sits cleanly.
