Why All Other Fluid Trainers Will Leak

All other fluid based trainers including those made by Cycle-Ops, Trek, Blackburn and Elite use a drive shaft and rubber seals to spin the impeller in the fluid chamber. This is simply a bad design doomed for failure. It is not a matter of "IF" the resistance unit will leak, but "WHEN" the resistance unit will leak. The more you use the trainer, the faster it will break. A Cycle-Ops is pictured below.

As you can see, a drive shaft spins the impeller in the fluid chamber. Under extreme load, this drive shaft spins at 8,000 RPMs and the core temperature can reach 400 degrees F. A simple rubber " O- ring" with a backer spring is the only thing that keeps the fluid from leaking out of the resistance unit.

Using Crank Armstrong, Kurt Engineers can break a competitive fluid trainer in several hours. Feedback from bike dealers confirmed that leaking fluid units are a major issue with " other" trainers. We continue to perform destructive testing on the Kinetic trainer. Running at average of 25MPH, one resistance unit has logged over 30,000 miles at up to 50 MPH with no leaks or breakdowns. The engineers believe it would run over 100,000 miles without a problem.

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