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-   -   Shimano Barcon Shifter Retrofit (https://www.bikeforums.net/bicycle-mechanics/214117-shimano-barcon-shifter-retrofit.html)

Monoborracho 07-26-06 02:48 PM

Shimano Barcon Shifter Retrofit
 
I have an 8 speed indexed Shimano barcon that can be run in friction mode. Can I use this for a 7 speed and get it to work in the friction mode?



So, based on the following responses, I can use the 8 speed indexing to shift on a 7 speed freewheel. I guess the if the stop is set correctly on the derailleur then the extra "click" that is available on the derailleur is never reached.

This shifter has 7 clicks which to me means 1 gear + 7 gears = 8 speeds. Is this correct?

SoonerBent 07-26-06 02:56 PM

In friction mode there will be no problem.

SB

top506 07-26-06 04:02 PM

I'm pretty sure that the cog spacing is the same with Shimano 7 and 8 speed clusters. If so, it should index as well.
Top

grolby 07-26-06 07:58 PM

No need to use friction mode. The cog spacing between 7 and 8-speed is so close that 8-speed shifters will index perfectly over a 7-speed cassette or freewheel. This is the set-up I'd been running since April on my nice bike, and up until it was KO'd in an argument with an automobile bumper last week, it worked perfectly :).

Monoborracho 07-27-06 10:21 AM


Originally Posted by grolby
No need to use friction mode. The cog spacing between 7 and 8-speed is so close that 8-speed shifters will index perfectly over a 7-speed cassette or freewheel. This is the set-up I'd been running since April on my nice bike, and up until it was KO'd in an argument with an automobile bumper last week, it worked perfectly :).

Thanks


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