bikesetting
Suspension & tyre pressure calculator

Your bike.
Dialled in.

Fork, shock, SAG, rebound and tyre pressure – for hardtail and full-suspension MTBs, e-MTBs, gravel, road, touring and city bikes. With manufacturer data for more than 1,400 builds.

85 kg
67brands
1,835bikes
1,494with manufacturer data
Live preview · trail · tubeless
Fork–
Shock–
Front tyre–
Rear tyre–

Starting values – measured SAG is what counts.

Calculator

Your setup in four steps

Find your bike, enter your weight, done. Everything you enter stays in your browser.

1Find your bike

No bike selected yet.

2Rider and riding style

3Suspension components

4Your starting values

Disclaimer and data notice

The database is a curated selection of the best-known brands and their MTB/e-MTB models. It is expressly not a complete catalogue of every model, model year, frame size and build sold worldwide. For model families without manufacturer data, typical travel figures of the recent generations are stored; older generations, special editions and builds may differ. Components can vary within the same model name depending on market, size, model year or availability.

Values taken over automatically and calculated values are non-binding starting points. What counts is the type plate, serial number or tune ID, the owner’s manual and the approvals of the bike and component manufacturers, as well as the SAG you actually measure.

Never exceed the maximum pressure. Incorrect data or settings can affect control, component function and riding safety. If in doubt, consult a professional bike workshop. Use at your own risk.

Guides

How to set up your suspension

The calculated values are a starting point. These basics will help you find your personal setup.

Measuring SAG step by step

  1. Set the air pressure from the calculator or the manufacturer’s chart and fully open the compression.
  2. Wearing all your kit, stand on the bike in your normal riding position, ideally leaning against a wall.
  3. Bounce gently a few times, then stand still.
  4. Push the O-ring against the seal and carefully get off.
  5. Measure the distance and divide it by the travel (fork) or shock stroke. Too much SAG → add pressure; too little → release pressure.

If the frame manufacturer specifies its own target SAG, that always takes priority.

Read the full guide

Tuning rebound

Rebound controls how quickly the fork and shock extend after compressing. Too fast and the bike feels bucking; too slow and the suspension “packs down” over fast repeated hits.

Rule of thumb: more air pressure needs more rebound damping. Close the dial fully, open it by the clicks shown and compare in steps of two on a familiar test section.

Tyre pressure: tube, tubeless or insert?

Tubeless lets you run about 0.2 bar (2.9 psi) less than a tube because there is no risk of pinch flats. Inserts such as CushCore, Rimpact or Procore also protect the rim and support the sidewall.

Wider tyres and heavier casings need less pressure. The rear usually needs 0.1–0.3 bar (1.5–4.4 psi) more than the front.

Read the full guide

What’s different on an e-MTB

E-MTBs weigh 20–25 kg. The extra mass sits low in the frame and loads the rear wheel in particular, so they need a little more pressure in the shock and tyres as well as tougher casings.

For bike parks and steep descents, coil shocks or extra volume spacers are worth considering.

Read the full guide

Volume spacers and progression

Air springs get stiffer the deeper they compress. Volume spacers (tokens) reduce the air chamber and increase end-stroke progression.

If the suspension regularly bottoms out hard with the correct SAG, add a spacer. If you never use full travel, remove one.

Care and service intervals

Wipe the stanchions clean after every ride. The lower-leg service (dust wipers, foam rings) is due roughly every 50 hours depending on the manufacturer, the full service every 100–200 hours or once a year.

Exact intervals are in the manuals from FOX, RockShox and others.

Guides →

FAQ

Frequently asked questions

How much SAG does a mountain bike need?

A good starting point is about 15–20 % (XC) to 20–25 % (trail/enduro) of travel at the front and about 25–30 % of travel or shock stroke at the rear. The frame manufacturer’s recommendation always takes priority.

How do I measure SAG correctly?

Wearing all your kit, stand on the bike in your riding position, let the suspension settle, push the O-ring against the seal, carefully get off and measure the distance. Divide it by the travel or shock stroke.

What is the right MTB tyre pressure?

It depends on rider weight, tyre width, casing and tyre system. Tubeless tyres and inserts allow lower pressures than inner tubes. The rear usually runs 0.1–0.3 bar (1.5–4.4 psi) more than the front. The minimum and maximum pressures of tyre and rim always apply.

Why do e-MTBs need more pressure?

E-MTBs are 7–10 kg heavier, put more load on the wheels and are often ridden downhill faster. That is why they need a little more air pressure and tougher tyre casings.

How do I set rebound?

Close the dial fully, then open it by the recommended number of clicks. The higher the air pressure, the more rebound damping (fewer clicks open) you need.

Components

Component manufacturers

The key makers of suspension, drivetrains, brakes, wheels, tyres, dropper posts and e-bike motors with their current product lines.

ManufacturerCategoryProduct linesOrigin

Add your own bike