40/26 chainrings on 3x9 crankarms

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This topic has 9 replies, 5 voices, and was last updated 12 years ago by rickon.

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40/26 chainrings on 3×9 crankarms
drotos
Free Member

I’d like to convert a tripple chainset to use that with double rings. I’d like to use 40t 104bcd in the middle position, and 26t 64bcd in the inner position. I have a Whippet frame with press-fit bottom bracket. What about clearance issues?? Would the 40t chainring hit the chainstay? And what about 26t?

Many thanks!

Posted 12 years ago

drotos
Free Member

Could You, please help? What’s Your opinion?

Posted 12 years ago

cynic-al
Free Member

We can’t see your frame.

See how much clearance you have to play with on the existing set up, work out how much you need, is there enough?

Posted 12 years ago

Fresh Goods Friday 700 - The censored edition

drotos
Free Member

Ok, I know… 🙂 But I’m curious about Your experience!

Posted 12 years ago

chillidave
Free Member

I’ve been running 24/38 on an oldish 6″ all mountain bike and find it works really well. More than enough range of gears with an 11-34 on the back. Given the bike is probably a lot heavier than your whippet and I’m likely less fit you should be fine with that combination. Sorry but can’t help on the clearance issues!

Posted 12 years ago

drotos
Free Member

Yeah, the gear ratio will be fine, I’m just affraid of clearance…

Posted 12 years ago

njee20
Free Member

I’ve run 28/40 on several frames with no clearance issues. Whippets aren’t famed for their chainstay clearance though. Can’t you work it out based on your current clearance?

Posted 12 years ago

drotos
Free Member

No, I can’t because I don’t have the crank at the moment…

Posted 12 years ago

cynic-al
Free Member

Do you have a crank?

Posted 12 years ago

rickon
Free Member

Have a look here for info:

http://singletrackworld.com/forum/topic/on-one-whippet-concerns

Posted 12 years ago