Suntour XC Ltd / Shimano / SRAM Compatibility Issues...
bertberr
Posts: 151
Hi, quick question, hope somebody can help? (sorry for the rather detailed background, thought it might help if you had all the info from the off).
BACKGROUND: I have a 1991 Kona Cinder Cone which I used as my only bike on and off road between 91 and about 2001 and then just off road since then. It has probably covered a few 000 miles by now, and various bits have been changed / upgraded aong the way such as wheels, brakes (to deore V), stem, saddle, tyres etc. When I had the new Campag Mirox MTB rims made up, the bike shop used a Deore LX Parallax Hub, and possibly a Shimano cassette (not that techie so not really sure - it is chrome/silver and has different shaped teeth - wedged / slightly hooked - on different cogs and has a Lock Ring with Hyperglide stamped on, so I'm guessing Shimano though could have used this lock ring on suntour cassette?). It has a Shimano HG chain, however, it retains the original Suntour XC Ltd RD & FD & Thumbies (indexed on right shifter for RD, friction on left).
After replacing RD cable and re-adjusting from start, i.e. H/L, B-Adjuster, Indexing, I still can't get it to run very smoothly - if I get it right going up the cog, it then doesn't shift properly coming down, and this seems to get more pronounced when I take it off the work stand and go for a ride. Checked chain - Fine. Sprocket teeth all seem OK. Cable - New. Whole mech degreased and re-lubed. Only thing I can find that doesn't seem right to my untrained eye is the side to side movement in the RD itself, i.e. when you hold the bottom of the cage it can be moved a reasonable amount from side to side, so when you look at the chainline from behind the lower run of the chain is not below the upper run. When turning cranks on workstand and experiencing metallic noise from chain/cassette, if you put slight pressure on cage, effectivly removing the free play, the noise disappears... So, me thinks the Suntour RD is shagged and needs replacing (please correct me if you think otherwise).
RIGHT, THE QUESTION: If I retain the same hub/cassette/chain/Thumbies, what are my options re RD's currently on the market? I've read a couple of relevant threads on here and general concensus is that indexing ratios etc are very similar on suntour and shimano RD's (not sure about SRAM), so assuming this is correct, what do you think (specific model please) would work best with my existing combo?
Thanks
BACKGROUND: I have a 1991 Kona Cinder Cone which I used as my only bike on and off road between 91 and about 2001 and then just off road since then. It has probably covered a few 000 miles by now, and various bits have been changed / upgraded aong the way such as wheels, brakes (to deore V), stem, saddle, tyres etc. When I had the new Campag Mirox MTB rims made up, the bike shop used a Deore LX Parallax Hub, and possibly a Shimano cassette (not that techie so not really sure - it is chrome/silver and has different shaped teeth - wedged / slightly hooked - on different cogs and has a Lock Ring with Hyperglide stamped on, so I'm guessing Shimano though could have used this lock ring on suntour cassette?). It has a Shimano HG chain, however, it retains the original Suntour XC Ltd RD & FD & Thumbies (indexed on right shifter for RD, friction on left).
After replacing RD cable and re-adjusting from start, i.e. H/L, B-Adjuster, Indexing, I still can't get it to run very smoothly - if I get it right going up the cog, it then doesn't shift properly coming down, and this seems to get more pronounced when I take it off the work stand and go for a ride. Checked chain - Fine. Sprocket teeth all seem OK. Cable - New. Whole mech degreased and re-lubed. Only thing I can find that doesn't seem right to my untrained eye is the side to side movement in the RD itself, i.e. when you hold the bottom of the cage it can be moved a reasonable amount from side to side, so when you look at the chainline from behind the lower run of the chain is not below the upper run. When turning cranks on workstand and experiencing metallic noise from chain/cassette, if you put slight pressure on cage, effectivly removing the free play, the noise disappears... So, me thinks the Suntour RD is shagged and needs replacing (please correct me if you think otherwise).
RIGHT, THE QUESTION: If I retain the same hub/cassette/chain/Thumbies, what are my options re RD's currently on the market? I've read a couple of relevant threads on here and general concensus is that indexing ratios etc are very similar on suntour and shimano RD's (not sure about SRAM), so assuming this is correct, what do you think (specific model please) would work best with my existing combo?
Thanks
0
Comments
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so what do you need? how many rear gears? cassette or spin on block?
and why?
basical you can use what you want but more info needed to confirm, EG please list what you are going to plan to use."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
now just used as a road/rat bike, so happy to stay with 7spd, and anyway want to keep the XC Ltd thumbies so can't really go to 8 spd.
Cassette or spin on block? Haven't a clue! The hub is deore lx parallax and the cassette (?) is of the splined variety.
Cheers0
