2010 121 want to switch to 128 anyone doing extensions yet ?

[yamman]

removing 121 hacksaw from my 2010 gt was going to switch to 136 wondering about a 128 i belive the pitch is diferent any info on this?

 

[Badger]

X2

 

[pro116]

The have been doing it for yesrs on here.srxspec(Ulmerracing) did one a few years ago and he has sold kit's to people on here.It's the same pitch.
Check out http://www.ulmerracing.com/