Lockrings. Help!

by arrieredupeleton   October 9, 2012  

Can anyone enlighten me?

I'm moving an old (Circa 7 year old) 9 speed Tiagra cassette onto a Shimano R501 freehub. The Shimano spec says its suitable for 8,9 and 10 speed and it seems to fit well enough - until I get to the lockring.

The lockring is specifically for a 9 speed cassette with an 11 tooth cog. The problem is the depth of the thread of the lockring. When I fully tighten it, it appears to screw down onto the outer seal of the freehub, creating a drag effect ie. the cassette wont rotate completely freely and it results in the cassette failing to keep up with the freehub and the chain becoming loose when freewheeling or back pedalling.

Having looked at an more modern 10 speed Ultegra lockring, the body of the thing with the threads on is not as deep i.e. it wont foul the freehub seal.

My question is whether this sounds plausible and if so, where can I get a modern 9 speed lockring for a 11 tooth cog??

4 user comments

Oldest firstNewest firstBest rated

it's entirely possible, just never heard of it before !
Replacement lock ring ...
http://www.chainreactioncycles.com/Models.aspx?ModelID=38651

can you measure the thread length ? I can check one of
mine as I used to run 501's as well ....

still on the 3rd switch-back of Bwlch !

posted by therevokid [726 posts]
9th October 2012 - 13:27

5 Likes

Or with nice colours http://www.dotbike.com/p/13051

Wooliferkins's picture

posted by Wooliferkins [48 posts]
9th October 2012 - 13:46

7 Likes

therevokid wrote:
it's entirely possible, just never heard of it before !
Replacement lock ring ...
http://www.chainreactioncycles.com/Models.aspx?ModelID=38651

can you measure the thread length ? I can check one of
mine as I used to run 501's as well ....

Cheers for the prompt response. I'll measure it and post it here. The Token one you linked to has a longer thread according to the review on that page. The Shimano one seems to come with a spacer - perhaps that's my problem.

arrieredupeleton

posted by arrieredupeleton [563 posts]
9th October 2012 - 13:53

5 Likes

it's not really a spacer ... more a very thin "wavy"
washer !
I've a couple of SRAM / Shimano ones lying around if needs
be I can post Smile

still on the 3rd switch-back of Bwlch !

posted by therevokid [726 posts]
9th October 2012 - 20:30

6 Likes