Changing from 7 speed to 8,9 or 10 speed

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fin123
Posts: 5
Joined: Sat Dec 28, 2013 09:41 am

Changing from 7 speed to 8,9 or 10 speed

Postby fin123 » Sat Dec 28, 2013 09:49 am

I have a 7 speed Scott Speedster 60 and would like to upgrade the relatively basic drivetrain, however, it's a 7 speed and it's near impossible to find any 7 speed chainsets or rear dérailleurs. I'm looking to install a new cassette, chainset and rear derailleur, would I have to change my shifters and front derailleur too? Also, is it possible to change from a 7 speed to an 8 speed without having to change shifters?

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Monty Dog
Posts: 20382
Joined: Thu Dec 14, 2006 14:31 pm

Re: Changing from 7 speed to 8,9 or 10 speed

Postby Monty Dog » Sat Dec 28, 2013 10:41 am

You're looking at pretty well an entire new transmission including rear hub/wheel if you want to go 9 or 10 speed.
If you want 8 speed, you need to change the rear shifter, cassette and chain but can keep everything else. The 7 speed gear mechs will work fine with 8 speed but will struggle with 9/10 due to the narrower chain.
Make mine an Italian, with Campagnolo on the side..

Cheesemanpaul
Posts: 49
Joined: Wed May 22, 2013 18:08 pm

Re: Changing from 7 speed to 8,9 or 10 speed

Postby Cheesemanpaul » Mon Dec 30, 2013 07:38 am

I thought 8 and 9 speed cassettes was the same width, they are on mtb because if you wanted to use a 7 speed on a 9 speed hub you needed a spacer. May be different on a roadie???

DesWeller
Posts: 5233
Joined: Mon May 05, 2008 15:36 pm

Re: Changing from 7 speed to 8,9 or 10 speed

Postby DesWeller » Mon Dec 30, 2013 23:43 pm

Perhaps a better question to ask is, what are you aiming to achieve by upgrading?


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