Originally Posted by
mattface
If you are trynig to get 6 speed indexed shifting working with a Suntour freewheel, and Shimano shifters there is your problem right there. Suntour and Shimano indexed systems were spaced differently, and the parts are not supposed to be interchangeable.
The Uniglide DA cassette on my Razesa shifts pretty damn sweet, it's hard to imagine Hyperglide would be a lot better, but I'll find out when I upgrade it to 9-speed. the freehub body is in the mail.
This particular freewheel used the same spacing as a 6 speed shimano so it worked. It was a notch below the uniglide in terms of smooth shifts. The uniglide is a couple of notches below the hyperglide though a newer chain may have benefited both the suntour and the uniglide.
The Suntour worked pretty well on the small chainring, on the large it sometimes took a little pressure beyond the detent to get the shift to complete.
I notice this sometimes even on my uniglide bike when downshifting.
The suntour large chainring problem could be due to the fact that I forced a 126 mm wheel into the 120 mm dropouts and they're not quite parallel or perhaps the derailleur claw is slightly bent.
Or it could be because uniglide or hyperglide is just necessary for decent index shifting on shimano equipment.