The S&M Railed Seatpost is as it's name implies compatible with all seats that use the rail system

with 19mm and 22mm washers downsizing the 24mm center hole to fit all cranks

the BSD Revolution feels like a cassette hub

Also because this part is cast and heat treated it strengthens the rear end of the frame by stiffening it up

Useful things to know include that the there is ample tyre clearance up to 2

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