Sram Derailleur compatibility.

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Salty Seadog
Posts: 16
Joined: 1 Apr 2018, 10:00am

Sram Derailleur compatibility.

Postby Salty Seadog » 11 Aug 2018, 4:19pm

I need to replace my sram derailleur on the Montpellier. It has flat bar therefore trigger shifters. I have looked at the sram apex derailleur but this is a road mech. Both it and the mech it is replacing use sram exact actuation which gives a 1:1 pull ratio.

Is it likely to work here or will I need a mtb specific mech?.

TIA.

Brucey
Posts: 32690
Joined: 4 Jan 2012, 6:25pm

Re: Sram Derailleur compatibility.

Postby Brucey » 12 Aug 2018, 1:02pm

safest option is to get another (X-series?) MTB mech with a similar number of speeds. You don't say how may you have, which makes it difficult to help you.

The Apex (10s) rear mech, although it is called '1:1' exact etc appears to have a different shift ratio to the 7/8/9s stuff (which isn't 1:1 exactly either), judging from the measurements on this page

https://en.wikibooks.org/wiki/Bicycles/Maintenance_and_Repair/Gear-changing_Dimensions

worth looking at this page too

http://blog.artscyclery.com/science-behind-the-magic/science-behind-the-magic-drivetrain-compatibility/

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

Mud-Plugger
Posts: 24
Joined: 18 Jul 2018, 9:03am

Re: Sram Derailleur compatibility.

Postby Mud-Plugger » 12 Aug 2018, 2:52pm

It used to be an SRAM Rival 11 speed long cage on the Montpellier.

This one?

http://www.chainreactioncycles.com/sram ... prod136599

Salty Seadog
Posts: 16
Joined: 1 Apr 2018, 10:00am

Re: Sram Derailleur compatibility.

Postby Salty Seadog » 12 Aug 2018, 3:25pm

Brucey It is a 10 speed cassette so I am replacing a 10 speed mech.

Mud plugger, mine is a 2014 Montpellier, the components are sram via GT. A groupset they only used for a couple of years.

Brucey
Posts: 32690
Joined: 4 Jan 2012, 6:25pm

Re: Sram Derailleur compatibility.

Postby Brucey » 12 Aug 2018, 5:51pm

10s sram road or mountain should work provided there is enough capacity

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

Salty Seadog
Posts: 16
Joined: 1 Apr 2018, 10:00am

Re: Sram Derailleur compatibility.

Postby Salty Seadog » 12 Aug 2018, 6:12pm

Brucey wrote:10s sram road or mountain should work provided there is enough capacity

cheers


Many thanks.