Short cage rear mech

[beancounter]

What is the maximum sprocket range when using a short cage rear mech? Crankset is 53/39 i.e. 14 diff.

Thanks for help.

bc

 

[peanut]

I'm using a 53tx38t with an 8 spd cassette 12t-28t and 105 short cage 10spd rear mech
It is changing without problem but I reckon I must be about on the limit.

 

[MartinC]

Usually about 30 teeth. Check the manufacturers specs on the net. If it's shimano then check the biggest sprocket the mech will cope with too. Manufacturers tend to be a bit conservative with these so you can often get away with a bit more if you want to take the risk.

 

[mickle]

26 total tooth difference is the official line from Shi**no, which gives you the option of 12-24 or 11-23. I think you'll have no problems with 12-27 though with a tweak of the b-adjust.

 

[itisaboutthebike]

39/53 is alomst the same as 34/48 (which I use on my sportive bike), and I use 12-27 with a campag short cage r mech no problem.

12-27 should be ok with your 105 set-up, but as you say, you're probably on the limit

 

[Dave5N]

27 max is the shimano line. 28 works fine.

 

[peanut]

27 max is the shimano line. 28 works fine.

yep I think we already established that in the second post

 

[beancounter]

It's campag not shimano. Chorus rear mech. Make any difference?

bc

thanks for the help so far

 

[peanut]

It's campag not shimano. Chorus rear mech. Make any difference?

bc

thanks for the help so far

Oh god ! ...... smacks forehead

no it will work fine. I have sora 8 speed on my winter hack with 10 spd 105 shortcage rear mech and it works fine with both my rear wheels one of which has 12-27 shimano and the other 12-28 campag both 8 speed