6 Speed to 7 speed conversion
12-18-05, 11:48 PM
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6 Speed to 7 speed conversion
Hello,
I have a 1986 6-speed indexing downtube shift Cannondale road bike w/ Shimano 105 components. I would like to convert to Dual Control bar shifters. I am thinking that the solution is to add a 7 speed freewheel to my existing hub, then purchase either the Shimano Rsx or Sora 7 speed shifters. Am I correct thinking that the stay widths and clearances will be OK by simply installing a 7 cog freewheel in place of my old 6 speed?
Thanks,
Brian
I have a 1986 6-speed indexing downtube shift Cannondale road bike w/ Shimano 105 components. I would like to convert to Dual Control bar shifters. I am thinking that the solution is to add a 7 speed freewheel to my existing hub, then purchase either the Shimano Rsx or Sora 7 speed shifters. Am I correct thinking that the stay widths and clearances will be OK by simply installing a 7 cog freewheel in place of my old 6 speed?
Thanks,
Brian
12-19-05, 06:59 AM
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It should be no problem, but it might be a good idea to check first. I just put a 7 speed casette on an 8 speed wheel, it needed a spacer but works ok. This wheel fits great on 1 of my bikes, but is a little too wide for another. Not sure why, both MTB's were 7 speeds...
12-19-05, 07:23 AM
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A 7-speed FW is just slightly wider than a 6-speed FW. It will probably fit as is but there is a small chance that you will need to add a 1mm axle spacer to the drive side.
The front STI shifter will probably not pull enough cable for the "non-STI" front derailer.
The front STI shifter will probably not pull enough cable for the "non-STI" front derailer.
12-19-05, 03:04 PM
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Originally Posted by bhmon
Hello,
I have a 1986 6-speed indexing downtube shift Cannondale road bike w/ Shimano 105 components. I would like to convert to Dual Control bar shifters. I am thinking that the solution is to add a 7 speed freewheel to my existing hub, then purchase either the Shimano Rsx or Sora 7 speed shifters. Am I correct thinking that the stay widths and clearances will be OK by simply installing a 7 cog freewheel in place of my old 6 speed?
Thanks,
Brian
I have a 1986 6-speed indexing downtube shift Cannondale road bike w/ Shimano 105 components. I would like to convert to Dual Control bar shifters. I am thinking that the solution is to add a 7 speed freewheel to my existing hub, then purchase either the Shimano Rsx or Sora 7 speed shifters. Am I correct thinking that the stay widths and clearances will be OK by simply installing a 7 cog freewheel in place of my old 6 speed?
Thanks,
Brian
https://sheldonbrown.com/k7.html
Sheldon discusses, in detail, all of the issues you need to consider to do your conversion. Good luck with your upgrade ;-)
