Rear derailer/rear cassette/briffters
07-25-20, 11:11 AM
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Rear derailer/rear cassette/briffters
Hi, I’m trying to update/fix an old family bike. Currently it’s a 2x5 for the gears. I’ve recently replaced the both derailers with TD-one torque drive system this rear derailer is meant for 6 gear rear cassette, the brifters ive recently purchased are 7 gears. I’m in the process of updating my rear cassette to a 7 gear cassette to match the shifting, my question is will the rear derailer work with this setup?
07-25-20, 02:03 PM
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Save yourself a lot of trouble and take the TD back and buy a cheap shimano tourney.
You're likely going to have to spread the rear spacing to fit a 7 speed in.
https://www.sheldonbrown.com/cribsheet-spacing.html
You're likely going to have to spread the rear spacing to fit a 7 speed in.
https://www.sheldonbrown.com/cribsheet-spacing.html
07-26-20, 11:08 AM
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Generally, the shifters, derailleur, and cassette all need to be from the same "family" to work together. If the rear derailleur is not designed for 7 speed index shifting, it probably won't work well.
The shifters will be pulling 'X' amount of cable with each shift. The derailleur & cassette are designed for 'X' cable pull. If you use a random rear derailleur, it may move more or less than expected, so won't match the cog spacing.
The shifters will be pulling 'X' amount of cable with each shift. The derailleur & cassette are designed for 'X' cable pull. If you use a random rear derailleur, it may move more or less than expected, so won't match the cog spacing.
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Last edited by Homebrew01; 07-26-20 at 11:12 AM.
