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Old 02-11-09, 03:29 PM   #1
clanmacleod
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Can friction shifter be updated to index?

I bought my son an Awesome Giant MTB (the model name of the bike, not the primary term I would use ). Its a 24" tire MTB that uses Shimano SIS friction shifters and has a Shimano 70GS rear derailleur, 3 x 6 speed. My 10 yo is having more trouble with the friction shifting than I'd expected.

Its a good fit otherwise. Anyone know if index shifters would work? Right now I've disabled the front shifter to simplify things for him. I don't want to invest a lot into it - ie new chain ring/cogs, but if a simple $30+- shifter upgrade would do it, awesome (that last awesome WAS a descriptor ).


Thanks for any advice.

Last edited by clanmacleod; 02-11-09 at 03:38 PM. Reason: My sad spelling
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Old 02-11-09, 03:42 PM   #2
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there should be a small loop on the right shifter that says "friction <-> SIS"
simply turn the loop to make the arrow to point to the "SIS" and it's in indexed mode. there should be an audible "click"
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Old 02-11-09, 03:56 PM   #3
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Yeah.... SIS stands for "Shimano Indexed Shifting" doesn't it?
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Old 02-11-09, 03:58 PM   #4
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Quote:
Originally Posted by clanmacleod View Post
I bought my son an Awesome Giant MTB (the model name of the bike, not the primary term I would use ). Its a 24" tire MTB that uses Shimano SIS friction shifters and has a Shimano 70GS rear derailleur, 3 x 6 speed. My 10 yo is having more trouble with the friction shifting than I'd expected.

Its a good fit otherwise. Anyone know if index shifters would work? Right now I've disabled the front shifter to simplify things for him. I don't want to invest a lot into it - ie new chain ring/cogs, but if a simple $30+- shifter upgrade would do it, awesome (that last awesome WAS a descriptor ).


Thanks for any advice.
You disabled the front shifter? So is it the front shifter he's having a problem with?

70gs I'm assuming they're thumbshifters, and there's no such thing as an indexing front thumbshifter. You'd have to switch to something like this:

http://cgi.ebay.com/Shift-Lever-MTB-...ts_Accessories

If you're talking about the rear then yes, sis means indexing and you should be able to switch to indexing if it's not busted.
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Old 02-11-09, 05:57 PM   #5
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Originally Posted by Doohickie View Post
Yeah.... SIS stands for "Shimano Indexed Shifting" doesn't it?
right. (Shimano Index System). if it says SIS then it should be capable of indexing
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Old 02-11-09, 09:20 PM   #6
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I feel sheeeeepish! Thank You.
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