The idea has been copied by those Taiwanese guys. But its unparalled performance has yet to be matched. The DEWLIE has been the world's number 1 Dual-ring Shift guide since we introduced it in 2000. Virtually maintainance free and super easy to setup this guide is your new best friend!
Buy Blackspire Dewlie E-Type Double Ring C4 from Chain Reaction Cycles, the World’s Largest Online Bike Store.
If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or fitted.More information on returns