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Old 07-12-10, 09:48 AM   #1
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Shimano 6 speed SIS shifter with Shimano 7 speed freewheel?

It's time to put a new freewheel onto my '96 Diamondback MTB which currently has a 6 speed freewheel & SIS derailler & indexed shifter. I like the Shimano 7 speed freewheel (Megarange/Alpine 14-34) which I put on my Raleigh friction shifting road bike. My question is: Is a 6-speed Shimano index shifter & derailler compatible with a Shimano 7 speed hyperglide freewheel?

I have searched for the answer everywhere but didn't find this specific combo... Thanks, all!
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Old 07-12-10, 10:58 AM   #2
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You will have to replace the shifter to match. Why not stick with six speed? I assume you have twist grip or trigger shifter, so switching it to friction is not an option.

Shifter and freewheel need to match.

Shimano also makes a six speed Megarange. Someone sells them on ebay for $10, might find a better deal elsewhere. Depending what is currently on your bike, you probably need a new chain and perhaps a new RD. It really depends which model derailleur do you have? Shimano makes a lot of models.

Last edited by wrk101; 07-12-10 at 11:04 AM.
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Old 07-12-10, 11:09 AM   #3
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Friction shifting mode available? , that will resolve the compatibility issue.
Gap between cogs is narrower so 7 could fit in 126 wide 6 speed frames .

IRD also makes 6 speed freewheels wont have the 24 to 34 T jump , which I dislike

I Have used the 28t #5 of 6 cog a lot , and would miss its ratio combination if its not there..

Last edited by fietsbob; 07-12-10 at 11:23 AM.
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