SuperB Rear Deraileur Extender YGroup_7033972555821 elastic inserts below the backside

elastic inserts below the backside waist hem let the shorts adapt to your movements and body position

100 mm (standard) or 110 mm (Boost)

low-cadence shifting across the 11-48 tooth E-BLOCK cassette

The pre-shaped form and strategic cuttings of the pad enable it to fit the natural posture of your knee and make sure that the pad can follow those movements

With gobs of beautifully modulated power and intuitive easy-to-use adjustability

SuperB Rear Deraileur Extender YGroup_7033972555821 elastic inserts below the backsideThe SuperB Rear Derailleur Extender extends the position of a road derailleur to run a wide range mountain bike style cassette. Who's this item for: Road and Gravel riders wanting to run mountain bike cassettes on their drop bar bikes. Dimensions: 32 x 36mm