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I have an 07 GF Hifi. i switched the shifters and derails to sram x9. i broke some teeth on my cassette (11-32). i'd like to switch to an 11-34 and get a new chain. is the 11-34 compatible? i have horrible technique and shift a lot while climbing. i need something real durable for adventure racing. any help is appreciated. thanks
 

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Learn proper technique for shifting. All it takes is a little planning ahead and backing off on the pressure on the pedals when you want to shift. Don't shift under more than 25% power and you'll save your ring gears and cassettes. Spin the gears, but under light load when you want to shift.
 

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I'm with randyboy, doing adventure racing with poor technique just doesn't sound like a good idea. Your drivetrain is probably compatible since you're running an 11-32 now, but if you installed a short cage rear derailleur then it could be an issue; chain length might not be optimal either. What cassette were you breaking teeth off of?
 

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hunter4623 said:
I have an 07 GF Hifi. i switched the shifters and derails to sram x9. i broke some teeth on my cassette (11-32). i'd like to switch to an 11-34 and get a new chain. is the 11-34 compatible? i have horrible technique and shift a lot while climbing. i need something real durable for adventure racing. any help is appreciated. thanks
Go SRAM 990 or XT for the cassette, light enough and the most durable as well. 11-34 will work fine as long as you have the long-cage RD.

And practice better shifting technique, it will save you money and pain.
 

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thecrazyfinn said:
Go SRAM 990 or XT for the cassette, light enough and the most durable as well. 11-34 will work fine as long as you have the long-cage RD.

And practice better shifting technique, it will save you money and pain.
yeah right, check out the reviews, Ill sell you mine , it has <100 miles and bent third ring
never crashed , no sticks, nothing, just climbing over rocks and roots on tight singletrack
if thats their most durable Ill stick with LX
 

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Bikinfoolferlife said:
Your drivetrain is probably compatible since you're running an 11-32 now, but if you installed a short cage rear derailleur then it could be an issue; chain length might not be optimal either.
I'll be switching from a 970 11-32 cassette to an 11-34 990... My bike already has a long cage X9 rd (stock component)... Will I need to add some extra links? Or switch to a longer chain?

cheers
 

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MI_canuck said:
I'll be switching from a 970 11-32 cassette to an 11-34 990... My bike already has a long cage X9 rd (stock component)... Will I need to add some extra links? Or switch to a longer chain?

cheers
If you can stay out of the big ring and the 34 tooth cog, you should be fine. You shouldn't be in that gear combo anyway.
 

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if i added an extra link, would that be ideal though?

i've got a shimano chain right now, wondering if worth upgrading to the sram pg991 (regular or hollow pin) when i swap the 970 11-32 to 990 11-34?


cheers
 

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Dont bother adding links. Don't go into big-big, end of story.


But yes, its totally worth upgrading. Love the 991 on my tass!
 
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