Originally Posted by
JasonC SBB
"This was my procedure:
1) Set body length so that at full bumpstop compression the tire almost rubs. This helps get you lowest possible ride height. With larger tires you need longer shock bodies.
2) You then adjust the perch ("pre-load") for the minimum bump travel you need for your roads. With 5kg spring and bumpy roads and tein 40mm bumpstops you need about 1" of bump travel at the shaft before touching the bumpstops.
The above will give you the lowest possible ride height. Any shorter on the shock body and the tire will rub. Any lower on the perch and you have insufficient bump travel. With my 5 kg rear spring I'm at about 12.75" with 195 tires, and 13" with 205 tires, and about 1.5" droop travel.