Can I Upgrade?
10-15-07, 10:50 AM
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Can I Upgrade?
I've got a new 27' wheel coming for my 1980 Motobecane Jubile Sport. I'm planning on switching the DT shifters to bar-ends soon. My question is... Can I upgrade the rear from a 6spd to 7spd? And how hard would it be if possible? Or is it worth having my LBS install the cassette?
10-15-07, 10:58 AM
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The short answer is you can definitely upgrade to a 7-speed.
The more adequate answer can get pretty long. Potential issues include dropout spacing and repeated bent rear axles. At best, neither will crop up as a problem. Also at best, you won't be gaining much either.
The more adequate answer can get pretty long. Potential issues include dropout spacing and repeated bent rear axles. At best, neither will crop up as a problem. Also at best, you won't be gaining much either.
10-15-07, 11:31 AM
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Also, you are probably confusing the term cassette with freewheel.
Freewheels are screw-on and are available in (typically) 5-7 speed and cassettes are locked on either with a lock ring, or the last cog acting as a lock ring, and are available with usually 7-10 speeds (with some 6 speeds)
More info here:
https://sheldonbrown.com/free-k7.html
I am having my LBS build a 27" wheel with a freehub so I can upgrade my bike to use up to 9 cogs... I would change to 700c, but my bike uses Cantilever brakes without the adjustment I would need to get to the 700c rims.
Freewheels are screw-on and are available in (typically) 5-7 speed and cassettes are locked on either with a lock ring, or the last cog acting as a lock ring, and are available with usually 7-10 speeds (with some 6 speeds)
More info here:
https://sheldonbrown.com/free-k7.html
I am having my LBS build a 27" wheel with a freehub so I can upgrade my bike to use up to 9 cogs... I would change to 700c, but my bike uses Cantilever brakes without the adjustment I would need to get to the 700c rims.
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People do not seem to realize that their opinion of the world is also a confession of character.
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10-15-07, 08:02 PM
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Shimano's 7-speed freewheels are index compatible so they have the improved tooth shape. Nashbar's housebrand freewheels (made by Sun Race) are also index compatible.
