Things to note:

This is a perfect upgrade and/or replacement cassette for 11-speed drivetrains

The low-profile design with a deep concave allows your foot to “sit-in” the pedal and improves grip and comfort

English/BSA 68mm

coupled with a seam-free gusset

Pirelli SporTUBE - 48mm - 27.5 Inch - Presta - 2.5-2.8 Inch Dangerous Goods Things to note:The SporTUBE is the most classic cycling inner butyl tube range, the standard interpretation of the most used air retention system in the worldA complete range with the size and specification for every kind of cyclist and discipline, from road cycling to urban commuting. MODEL SIZE WEIGHT VALVE TYPE VALVE COLOUR MATERIAL COMPATIBILITY SporTUBE 27. 5" x 2. 1 2. 4 200g Presta, 48mm Silver Buty1 Disc and rim brakes