how long of extention Do I need to run a 128 long track on my 121 m 10. I have a 4 inch kit from a 136 mountain srx skid that I want to modify to fit my m10. thanks Pete.
musselman
Active member
I believe you need to move the rear axle back 3.5" for 121 to 128.
I have some nice billet rail ext. that r 4 inches.