yamaha_snopro
New member
how long are the rail extensions? will a 3 inch extension work to go to 136 from 121? 
Vmax Al
New member
They are about 8", depends on drivers, rear wheel size..... Basically added length divided by 2 to start and then the other mods factor in. Check out the check list on Hartman's site for ideas of what to know when buying them.