high_tea wrote:Mustang wrote:When I bought my Vitus I unknowingly purchased it with a Uniglide cassette (12/21) (7 speed), with a chain ring count of 53/39 on a 51cm frame.
My first ride seems Ok on the flat, but I suspect I'm going to run out of puff on the hills?
Research on Sheldon Brown site suggests one can use a Hyperglide cassette ,(as Uniglide cassettes above 21 teeth are almost impossible to find) file out the wide spline section & use it on your Uniglide hub with the original 12t cog holding everthing together.
Has anyone performed this surgery with success? alternative to my problem I guess is new wheels & hub, with a 12/25 cassette, but as its Sant'e group with Sant'e hubs I'm reluctant to do this. Rear space is 125mm.
Yeah, I did this to get a 34T rear sprocket on my old roadbike. It was pretty straightforward. I got lucky and didn't have to file out any splines either. Indexing was fine, as I recall. ISTR having to use the top two sprockets but that might be my mind playing tricks. Anyway, I followed SB's description and it all went fine.
Wow 34T & it still shifted, I would have thought 26/28 would have been max? Have found a S/H cassette at $15, to try, out of the US Uniglides are pulling $149 plus shipping