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?
Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
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.
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)
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.
'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Originally Posted by garrettbuckeye
Freewheel... very nice. Thank You!
Would I benefit in replacing the 6 spd freewheel with a newer one? w/ shift ramps?
You are more likely to find a 7-speed freewheel with ramps and shaped teeth and they should be a direct replacement for your current 6-speed as the overall width is almost the same and they both were intended for 126 mm dropout spacing.
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.