Changing SRAM 11-28 to 12-36 Cassette

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peter.k@xtra.co.nz
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Joined: Mon Dec 17, 2012 22:42 pm

Changing SRAM 11-28 to 12-36 Cassette

Postby peter.k@xtra.co.nz » Mon Dec 17, 2012 22:51 pm

I have changed a cassette from a 11-28 to a 12-36, however I can't seem to select the larger 2 gears. I have SRAM Force derailleurs (front & rear). I've heard from one person that all I need is another chain, but I've also heard from someone else that I need to buy a whole new set of componentry for this (which sounds a bit strange). Can anybody help me please???

Pnev
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Joined: Thu Apr 26, 2012 16:45 pm

Re: Changing SRAM 11-28 to 12-36 Cassette

Postby Pnev » Mon Dec 17, 2012 23:10 pm

The force can't take a 36t you'll need the apex mech (or fit an apex cage to the force mech) and you'll also need to add a few extra links to your chain

peter.k@xtra.co.nz
Posts: 2
Joined: Mon Dec 17, 2012 22:42 pm

Re: Changing SRAM 11-28 to 12-36 Cassette

Postby peter.k@xtra.co.nz » Tue Dec 18, 2012 00:17 am

OK, thanks for your help, maybe easier to stick with the 11-28 gearset.

Pnev
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Joined: Thu Apr 26, 2012 16:45 pm

Re: Changing SRAM 11-28 to 12-36 Cassette

Postby Pnev » Tue Dec 18, 2012 01:51 am

28 is perfect for most uk roads. 32+ comes in handy if you're carrying luggage or have very long steep climbs

keef66
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Re: Changing SRAM 11-28 to 12-36 Cassette

Postby keef66 » Tue Dec 18, 2012 16:26 pm

Pnev wrote:28 is perfect for most uk roads. 32+ comes in handy if you're carrying luggage or have very long steep climbs


If his user name is his email address then he's not in the uk!

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Monty Dog
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Re: Changing SRAM 11-28 to 12-36 Cassette

Postby Monty Dog » Tue Dec 18, 2012 17:28 pm

AFAIK maximum sprocket on Apex is 32 - you likely need an MTB mech for a 36
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philthy3
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Re: Changing SRAM 11-28 to 12-36 Cassette

Postby philthy3 » Wed Dec 19, 2012 08:16 am

SRAM do a WiFli rear derailleur in all of their road groupsets now so you can get a Force one rather than fit an Apex one. I've recently changed mine as I am admittedly slow (read crap) at climbing and forcing myself up and over the really steep stuff has been causing injury problems around the knees. I went for an 11-32 but I think it will be too over the top for me and the 28 would give better ratios. The 32 does give me an emergency bail out though on the very steepest of climbs.

Use whatever gearing you are comfortable with. The fact that one person can get along fine with a 28 tooth largest rear sprocket is fine for them but doesn't mean you have to suffer with it if it is not right for you. Gear the bike for your abilities and nobody else. If you encounter plenty of big percentage climbs on your rides, then it makes sense to go for as big a rear sprocket as you need otherwise you risk the dreaded get off and push.

SRAM do a WiFli climber kit for around £100 that includes Rival rear derailleur, rear cassette and chain.
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