DBDirt Bike Finder
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Suspension & Setup

Dirt Bike Suspension Travel Calculator

How much wheel travel is left after sag, and how a zip-tie on the fork relates to percent used.

Inputs

From the seal down to the zip-tie

Results
Live

  • Travel remaining at max

    40mm

  • Travel used

    87.1%

  • Stroke past sag

    170mm

  • Bottoming read

    Plenty of unused travel — you can go softer or slower rebound

Formula

Used % = sag + stroke used · Remaining = travel − max used

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.