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 Post subject: 7 speed upgrade?
PostPosted: Mon Oct 21, 2013 3:41 pm 
Dirt Disciple

Joined: Sat Oct 19, 2013 11:08 am
Posts: 19
Hi, I have a set of mavic 121dh ceramic rims built
On to stxrc hubs with a 7 speed cassette. Does anyone
No weather I could put an 8 speed cassette on instead? And if I have to change the hub would it still fit in my frame?
Any help would be great
Cheers


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 Post subject: Re: 7 speed upgrade?
PostPosted: Mon Oct 21, 2013 3:50 pm 
Section Moderator & South West AEC
Section Moderator & South West AEC
User avatar

Joined: Mon Jun 25, 2007 3:33 pm
Posts: 8163
Location: new forest
nope, 8 speed cassette won't fit, freehub is too short.

3 options,

remove freehub body, fit an 8speed version, respace hub to the correct 8 speed spacing then re-dish the rim so it's then central as by swapping the freehub body the rim position will be off centre in the frame after the respacing.

remove hub, buy 8/9 speed hub and rebuild into the rim

sell wheel(s) and buy an 8/9 speed set


:wink:

p.s i'm not deliberately following you around the forum :lol:


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 Post subject: Re: 7 speed upgrade?
PostPosted: Tue Oct 22, 2013 8:08 am 
Dirt Disciple

Joined: Sat Oct 19, 2013 11:08 am
Posts: 19
Thanks for that, I think I will keep out 7 speed and stick with sti shifters and cantilever brakes unless I can find some decent 7 speed shifters???


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 Post subject: Re: 7 speed upgrade?
PostPosted: Tue Oct 22, 2013 12:08 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8212
Location: New Forest, UK
One alternative is to run an '8 from 9' setup. If you take a 9 speed cassette (low or midrange, not one with the fancy sprocket carrier) you can discard the largest cog and spacer and it will fit. Use 9 speed shifters, chian etc and away you go!


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