going from 141 to 151 on 680 polaris

[sledder325]

could i just move my suspension back 5 inches instead of adding rail extensions but it has rail extensions from 136 to 141

 

[skyryder]

you want the rail extensions, If you move the skid back the track could catch the rails or the tunnel could crack. I did my 680 back in the day and used a skid from a o1 144 rmk with extensions, worked awsome still to this day and rode really nice, My 2 cents.