DBDirt Bike Finder
MotocrossEnduroOff-roadTrailMiniDual-sport
Suspension & Setup

Suspension Setup Calculator

One worksheet: race sag, static sag, suggested spring direction, and a starting clicker map from rider weight.

Inputs
Results
Live

  • Race sag

    102mm

  • Static sag

    35mm

  • Race sag %

    32.4%

  • Spring direction

    Keep this spring; change preload

  • Starting compression clicks out

    10

    From fully in, typical 16–24 click forks/shocks

  • Starting rebound clicks out

    12

Formula

Same sag math, plus a simple clicker starting map

Related calculators

Sag
Sag is how far the bike settles from fully extended. Measure from a fender mark to the axle with the bike on a stand, then on the ground.
Race Sag
Race sag (rider sag) is measured with the rider in full gear, balanced on the pegs. Most MX bikes want about 100–108 mm on ~310 mm travel.
Rider Sag
Front and rear rider sag together. Enter fender-to-axle (or a zip-tie on the fork stanchion) for each end.
Static Sag
Static sag is bike-only, no rider. Too little static sag with correct race sag means the spring is too soft (you used a lot of preload). Too much static sag means the spring is too stiff.