12 Speed Mountain Bike Cassette XD 9-50T Sprocket Black 9-50T Bicycle Flywheel Cogs 12S Compatible with SRAM
$ 26.79
About this item Rivet of big cogs up to 5.5mm, rivet of small cogs diameter increased to 2.5mm. According to the test, the structural strength is 40% higher than before.it significantly improved durability. Compatible with any MTB 12 speed derailleur, just make sure your hub is XD standard then it can fit. 9T not only increased the range, but also reduce the weight of the system, because there is a greater range allows you to use a smaller chainring, also reduces the risk chainring hit stone.
