Crash damage repair - sram front mech swapped for 105

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muzzan
Posts: 188
Joined: Thu Jun 07, 2012 21:13 pm

Crash damage repair - sram front mech swapped for 105

Postby muzzan » Tue Dec 11, 2012 20:37 pm

Hi all,

Looking for a bit of insight. In peoples experience are 105 front mechs compatible with SRAM Apex shifters?

Recently had a minor crash on my Boardman CX team & LBS diagnosed bent front mech, swapped the sram one for a 105 one. However when I put bike on stand tonight the chain was rubbing the cage on the inside both on the large & small front chainrings, & not just on the "extreme" gears (although even this was never a problem before).

I had a play with the limit screws & it seems to make little or no difference, even really loosening the low limit screw. Makes me think set up is not right.

Any thoughts appreciated

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The Rookie
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Joined: Thu Apr 30, 2009 09:29 am

Re: Crash damage repair - sram front mech swapped for 105

Postby The Rookie » Wed Dec 12, 2012 14:18 pm

Road front mechs use a different cable pull and are designed for different size chainrings, you're wasting your time.

muzzan
Posts: 188
Joined: Thu Jun 07, 2012 21:13 pm

Re: Crash damage repair - sram front mech swapped for 105

Postby muzzan » Wed Dec 12, 2012 18:27 pm

Thanks, but dont understand this answer because the Sram was a road mech & the boardman is basically a road bike!

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mudcow007
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Joined: Wed Apr 08, 2009 18:06 pm

Re: Crash damage repair - sram front mech swapped for 105

Postby mudcow007 » Mon Dec 17, 2012 16:33 pm

it goes on how much the gear changer (shifter) pulls of the cable though

not on just because the derailier is from a road bike

shimano an Sram have different pull "amounts"
Keeping it classy since '83

jonnym5
Posts: 70
Joined: Wed Jan 12, 2011 15:34 pm

Re: Crash damage repair - sram front mech swapped for 105

Postby jonnym5 » Sat Dec 22, 2012 00:29 am

The shifting will be fine from experience but it's probably just that the 105 mech has a slightly different shaped cage that allows you to run more extreme gears.

Same thing happens when using a 9spd mtb mech on an 8spd system.


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