JetBlack Z1 Pro Fluid Trainer with SQR Fit System and App Exclusive I-Spec B: Older Shimano brakes

I-Spec B: Older Shimano brakes such as Saint

Freehub mounting style: The XT CS-M8000 series cassettes utilise the Shimano HG Spline freehubs

Hearing Vents help you to stay aware of your surroundings & to hear better

While our DIVINE SL Rascal is completely locked in place in the top-out and bottom-out position for consistent riding position

JetBlack Z1 Pro Fluid Trainer with SQR Fit System and App Exclusive I-Spec B: Older Shimano brakesThe JetBlack Z1 PRO Fluid is a high quality, fluid resistance bicycle trainer. Fluid resistance trainers provide a more road like' feel than magnetic trainers and this feel is increased by a higher weight flywheel. The JetBlack Z1 PRO Fluid has one of the heaviest flywheels on the market and has the longest run down time in its class. The proprietary fluid in the JetBlack Z1 PRO Fluid increases resistance exponentially, the faster you spin the harder