I've got a Suntour XC Pro rear hub and am struggling to find a 7 speed cassette for it. Does anyone know if a Suntour 8 speed cassette will fit or will it be too wide (like Shimanos are)?
It will not, and to further complicate matters not all 7 speed will work either as there was MD and non-MD variations. Essentially there are several freehub body lengths, and cassettes were designed so that 7 speed had a single sprocket lock ring and 8 speed had a double sprocket lock ring.