Shimano CS-HG400-9 9-Speed Sprocket Cassette Size:One Size The patent-pending ION Tectonic_Fit is

The patent-pending ION Tectonic_Fit is the key – overlapping and sliding protection panels keep the pad close to your knee at all times but guarantee maximum freedom of movement at the same time

ergonomically contoured for optimal leverage and comfort

and all-around street skating with a recommended wheel size of 53mm and under

Most die-cut bases feature both colors

Shimano CS-HG400-9 9-Speed Sprocket Cassette Size:One Size The patent-pending ION Tectonic_Fit isShimano CS HG400 9 9 Speed Sprocket Cassette F Quick and easy assembly Reliable 9 speed Mountain bike shifting performance S Durable, silver finish Lightweight design 11 36T specification addition to 11 25T, 11 28T, 11 32T, 11 34T, 12 36T specs (11 25T, 11 28T not for RD M4000 M3000)