The jet black z2 fluid trainer is a high quality and smooth trainer that provides a quiet and realistic ride feel in comparison to other turbo trainers the proprietary fluid in the jetblack z2 fluid increases resistance exponentially up to 900 watts the faster you spin the harder it gets get the most out of each and every ride with jetblacks z2 fluid trainer the z2 design offers a wide range of resistance allowing you to tune your session by adjusting your gears the same as you would on th