Nashbar Fluid Trainer With Accessory Pack. The Nashbar Fluid Trainer with Accessory Pack is your all in one ticket to high performance indoor training. Our fluid trainer's resistance unit uses an internal flywheel system guaranteeing smooth, quiet, and consistent delivery of a lifelike pedal stroke. Additionally, the trainer is easy to set up and tear down plus with zero cords, power, cables, etc. it means you can just drop it down anywhere for a solid workout. Speaking of dropping the trainer down anywhere, the accessory pack includes a floor mat that protects your floor and carpets. Not only that, it ensures the trainer stays firmly in place as well as reduces the noise level. Also included in the accessory pack is a riser block that levels out your bike as well as provides front wheel stability.