11 speed. Function: Super Fluid Drive. Sprocket material: hi-tensile steel. Sprockets on Spider: 4 on 2. Alloy spiders, lockring & spacers. 6061 lockring. Metallic finish. Weight: 278g for the 11-28 option..
Best Price: £44.99 from Merlin Cycles
SunRace RX1 Cassette – 11 Speed – Silver / 11-28 / 11 Speed Reviews