Sram Force 10v Rear Derailleur

[AlexClare]

Hello,
I'm currently running Sram Force 10v 11-28. Wanting to go to an 11-30 or possibly 11-32. I've been told that with SRAM you're able to run up to 11-30 on a normal derailleur, would I need to change my chain length though or keep the same length? And does anyone know the measurements of the long/short cage for sram? So I can check which one I have got.

Thanks

[cxwrench]

Hello,
I'm currently running Sram Force 10v 11-28. Wanting to go to an 11-30 or possibly 11-32. I've been told that with SRAM you're able to run up to 11-30 on a normal derailleur, would I need to change my chain length though or keep the same length? And does anyone know the measurements of the long/short cage for sram? So I can check which one I have got.

Thanks

Go to the SRAM site and check photos to verify what cage you have. The short will work w/ up to a 28. You might get it to shift to a bigger cog but that doesn't change the fact that it will only wrap enough chain to work w/ a 28. Everyone forgets this but a rear derailleur has to do 2 things. It has to move at an angle that will allow the upper pulley to clear the big cog AND the cage has to be long enough to wrap the chain needed to go big/big w/ the installed big ring/big cog. Just because the derailleur might be able to shift into the big cog doesn't mean you won't tear your rear derailleur off at some point because your chain is too short.

[fronesis]

1. Someone should stickie cxwrench's first reply about the 2 functions of the RD when going to a bigger cassette.

2. The OP also asked about chain length: the answer is "probably." It depends on how long your current chain is and what method you use for determining chain length. If your current chain length was set with the "big/big +2" method, then it won't be long enough. If the current length was set with the "small/small don't drag" method, then you might be OK, but you'd still want to verify before heading off on a ride.

[cxwrench]

1. Someone should stickie cxwrench's first reply about the 2 functions of the RD when going to a bigger cassette.

2. The OP also asked about chain length: the answer is "probably." It depends on how long your current chain is and what method you use for determining chain length. If your current chain length was set with the "big/big +2" method, then it won't be long enough. If the current length was set with the "small/small don't drag" method, then you might be OK, but you'd still want to verify before heading off on a ride.

^This too!^