Rear short cage derailleur Calculation

[W1Z@RD]

Hi Guys,

 

Can anybody advise whether a Campag short cage rear derailleur is fine to work on a 50/34 12/27 set up?

 

I tried to work out the formula, based on max cog and max chainr but numbers total equal 31. So medium ..?

 

Any advice?

 

Tx 

[henk]

Hi Guys,

 

Can anybody advise whether a Campag short cage rear derailleur is fine to work on a 50/34 12/27 set up?

 

I tried to work out the formula, based on max cog and max chainr but numbers total equal 31.

 

Any advice?

 

Tx 

It's right on the limit. I ride 50/36 and 13/28 with a short rear derailleur with no trouble. I just make sure that I don't cross chain 50 and 26 or 28 (although it does work). Have ridden this setup for 2 years without trouble. 

[W1Z@RD]

It's right on the limit. I ride 50/36 and 13/28 with a short rear derailleur with no trouble. I just make sure that I don't cross chain 50 and 26 or 28 (although it does work). Have ridden this setup for 2 years without trouble. 

Also Campag SR?

 

I think I might just wait for the medium so i have flexibilty in future

[henk]

Also Campag SR?

 

I think I might just wait for the medium so i have flexibilty in future

No, Campag Veloce