The JetBlack Turn Block has been designed to level the front wheel and to allow freedom of movement.

When your bike is mounted on the trainer, it raises the back of your bike by a few centimetres, compared to the front, and restricts movement though the handlebars with the front wheel on the floor. This means that without a turn block, you will slip forward on your seat and change the angle and pressure through your pelvis and lower back. When your trainer is mounted on the turn block, it levels out the seat and allows movement through the handlebars, making the upper body less rigid and prone to injury when in the one position for long training periods.

IMPROVE YOUR INDOOR CYCLE TRAINING ERGONOMICS WITH THE TURN BLOCK.