Fluid trainers...the faster you pedal, the harder they go. The Travel Trac Comp Fluid Trainer uses progressive fluid resistance to give you a strong workout on days when you just can't make it outside. The external flywheel facilitates smooth and efficient pedaling action. Wide, stable base provides solid performance during hard efforts. Check out the link below for full product information.

http://www.performancebike.com/bikes/CatalogSearchResultView?storeId=10052&catalogId=10551&langId=-1&pageSize=16&beginIndex=0&sortBy=iphrase+relevance%2F%2F0&searchType=resultSet&cn1=&gast=40-5839&searchTerm=40-5839

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