SRAM, PG-1231 XPLR, CassetteMaximum range, minimum fuss. This 12 speed 11 44T cassette provides 2x range in a 1x package and fits on a traditional 11 speed driver body for broad integration. The smooth cog progression keeps jumps between cogs tightest when it's time to go fast, with more meaningful gaps for climbing. Plage de dveloppements de 400 % utiliser avec un drailleur arrire XPLR 1X Compatibilit avec les chanes Flattop Pour les corps de cassettes route 11 vitesses