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Chainring size upgrade 44t > 48t


philberesford's picture

By philberesford - Posted on 03 November 2012

My commuter hardtail is need of new chain rings, so i was thinking about swapping out the 44t to something bigger like a 46 or even a 48. Has anyone sucessfully done this and if so what (if any) issues* do I need to beware of?

Cheers
Phil

*Other than running a longer chain and reposition of FD

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Brian's picture

Just make sure the rear derailleur cage length is ok.

philberesford's picture

In what respect Brian? Longer or shorter? I've got an X-9 long at the moment.

hawkeye's picture

How big is granny? Many FD's have a capacity limit of 22 teeth eg 44 - 22.

You might also need to run a narrower range rear cassette eg 11-28 instead of 11-34T so the RD can cope

Brian's picture

If you google derailleur cage length there's calculations on what length you need.

philberesford's picture

Front is 22-34-44
Rear is 11-32

Seeing as how this is a commuter bike and I never ever use granny or the 32 can I swap the cassette out for a road cassette?

hawkeye's picture

9-speed road? Might not be that easy to get now. 11-28 mtb should be doable.

philberesford's picture

I just did a calculation based on this: http://bicycles.stackexchange.com/questions/7264...
and given my current cassette size it looks like my RD will not be able to cope. So I will def need to go to a 11-28. Thanks for the heads-up guys.

Right, time to go shopping.

hawkeye's picture

Other option is to lock out granny with the end point adjustment on the FD ... if you never use it. Would be cheaper Smiling

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