FLASH™️ 350g Road Disc Brake Hub Ratchect Center lock 21-21 Holes for Carbon Spokes CSK01 / CSK02

1. Shimano Road (HG) 11S works with 11/12-speed cassette directly or 8/9/10-speed mountain cassette with a spacer(s) .
2. Shimano MTB (HG) 10/11S works with 8/9-speed directly or 10-speed with a spacer or 11-speed road cassette if one of the inner cogs removed.
3. Campagnolo (Campy)  works with 9/10/11/12-speed Campy cassette with no spacers required.
4. Sram XDR could run XDR (road) cassette inherently and is compatible to run mountain bike XD cassette with a 1.85mm spacer.
5. Shimano Micro Spline (MS) works with 12-speed MS cassette only.