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 Post subject: 7 to 9 speed?
PostPosted: Tue Feb 26, 2013 9:50 pm 
Gold Trader
Gold Trader

Joined: Wed Feb 04, 2009 9:40 pm
Posts: 2157
Location: Nottingham
Sorry if this is in part slightly post-retro. Also, it's oft discussed but I seem to have got a bit lost in the details!

Just bought a '98/'99 RSP 250 (see viewtopic.php?f=4&t=243797), with which I am very happy - lovely frame. It rides very well as it is, but been down-spec'd - in particular from 27 to 21 speed. The shifters are nasty combo modern 3x7s - which have to GO. Now I don't mind 7 rear, but all my other wheels etc are 9 and I prefer interchangeabilty. I could just fit friction shifters, but I happen to have some index 9 speed to hand and a set of new red DX V levers, which would be good with the red decals!

I could junk the wheels, BUT the as new Mavic M231 rims seem to be worth keeping. The hubs are also nice nick polished DX - and thus (I assume?) do not take a 9 speed cassette.

Seems to me three options. Rebuild the rear on to a new 9 speed hub. Replace the DX freehub with a 9 speed (I THINK that this is possible - with a re-dish/re-space?). Remove one cog from a 9 speed cassette to fit on the existing freehub, setting stops accordingly and altering when I swop wheels. For the cassette chop I imagine easiest is to ditch the largest?

What have I missed? All comments (up to and including derision) gratefully received!


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 Post subject: Re: 7 to 9 speed?
PostPosted: Wed Feb 27, 2013 8:22 am 
Retro Guru
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Joined: Tue Aug 07, 2007 12:22 pm
Posts: 2942
Location: Platsa, Messinias, Greece
Myself, I'd just rebuild the rear wheel if you want true interchangeability between bikes.


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 Post subject: Re: 7 to 9 speed?
PostPosted: Wed Feb 27, 2013 8:41 am 
Retro Guru

Joined: Wed Jun 06, 2012 11:51 pm
Posts: 314
I've done the free hub body swap on mine, works well :D


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 Post subject: Re: 7 to 9 speed?
PostPosted: Wed Feb 27, 2013 10:25 pm 
Gold Trader
Gold Trader

Joined: Wed Feb 04, 2009 9:40 pm
Posts: 2157
Location: Nottingham
Thanks for views!

Having checked the DX/M231 wheels and fitted some fatter tyres they look so nice that I'm going for 7 speed thumbies with the friction option (which I always prefer for front mech anyway).


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 Post subject: Re: 7 to 9 speed?
PostPosted: Fri Mar 01, 2013 7:34 am 
Old School Grand Master

Joined: Sun Oct 21, 2007 2:33 am
Posts: 5487
Location: WI, USA
Good choice and your name proves it :D


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 Post subject: Re: 7 to 9 speed?
PostPosted: Fri Mar 01, 2013 10:24 am 
Gold Trader
Gold Trader

Joined: Wed Feb 04, 2009 9:40 pm
Posts: 2157
Location: Nottingham
Would that be the OLD(ave) or the (ol)DAVE bit?!


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 Post subject: Re: 7 to 9 speed?
PostPosted: Fri Mar 01, 2013 10:15 pm 
Retrobike Sponsor
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Joined: Sat May 22, 2010 10:33 pm
Posts: 2192
Location: Suffolk
Would a 10 speed cassette with one sprocket no fitted work. I am sure I have seen a write up on on Sheldon "the Good" Brown's site somewhere. Never tried it myself.


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 Post subject: Re: 7 to 9 speed?
PostPosted: Sat Mar 02, 2013 1:11 pm 
Gold Trader
Gold Trader

Joined: Wed Feb 04, 2009 9:40 pm
Posts: 2157
Location: Nottingham
I think TEN speed would only complicate matters - at the least all the other 9 speeders would need new chains!


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