The Mountain Bike Tubeless Tire Pressure Calculator made by Rollmassif is here

How to Use the MTB Tubeless Tire Pressure Calculator

Step-by-step guide

1. Enter your weight + everything you wear
   Rider + Gear = your body weight + helmet, shoes, backpack, hydration pack, body armor, tools, water, etc.
   Most people are 160–220 lbs (73–100 kg) once fully kitted.
2. Enter your complete bike weight
   Include pedals, bottle cages, computer mount, tubeless sealant, etc.
   Typical weights:

• XC race bike → 22–26 lbs
• Trail / All-Mountain → 28–33 lbs
• Enduro / e-bike → 34–50+ lbs

1. Choose your wheel size

• 29″ → most modern trail/enduro bikes
• 27.5″ → many enduro bikes & some trail bikes
• Mullet → 29″ front / 27.5″ rear (very common now)

1. Tire widths
   Pick the actual size printed on your tire sidewall (e.g., 2.4″, 2.6″, etc.)
2. Rim inner width
   Look inside your rim or on the manufacturer’s website:

• 25–29 mm → older trail/XC rims
• 30–34 mm → most current trail & enduro rims
• 35 mm+ → fat enduro or plus-bike rims

1. Riding style

• XC / Light Trail → you want efficiency & low rolling resistance
• Trail / All-Mountain → balanced grip & speed (default for most people)
• Enduro / Gravity → maximum grip & rim protection

1. Terrain & conditions today

• Dry / Hardpack → higher pressure is fine
• Mixed / Loam → default
• Wet / Roots → lower for more grip
• Rocky / Sharp → higher to avoid pinch flats & rim damage

1. Rear tire casing

• Standard / EXO / Light → most trail tires (Maxxis EXO, Schwalbe Super Trail, etc.)
• Heavy / DD / DH → Maxxis DoubleDown, EXO+, Schwalbe Super Gravity, etc.

1. Click “Switch to Metric” if you prefer kg & bar
   The calculator instantly converts everything.
2. Read your result!
   The big numbers are your ideal starting pressure.
   The thin bar underneath shows how close you are to the maximum safe pressure (45 psi).
3. Download or screenshot the card
   Press “Download Image” → you get a beautiful PNG with your exact setup + pressures. Perfect for Instagram, WhatsApp groups, or saving in your phone.

Fine-tuning tips from thousands of riders

Situation	Adjust from calculator result
You keep burping tires	+1–2 psi both wheels
You want maximum traction (hero dirt, bike park)	–1 to –3 psi (watch for rim strikes)
You ride very rocky tech (Sedona, Squamish, Alps)	+2–4 psi rear, +1–2 front
You’re on the light side (<150 lbs total)	Often go 1–2 psi below calculator
You’re on the heavy side (>240 lbs total)	Often go 1–2 psi above calculator
Running an insert (CushCore, etc.)	–2 to –5 psi (inserts give rim protection)

Quick real-world examples

Rider	Calculator says	Most people actually run
180 lb rider, 30 lb trail bike, 2.4″ tires	23 / 26 psi	22–24 / 25–27 psi
210 lb enduro rider, 36 lb bike, 2.6″ tires + insert	27 / 31 psi	23–25 / 27–29 psi (thanks to insert)
140 lb XC racer, 24 lb bike, 2.25″ tires	19 / 22 psi	18–19 / 21–22 psi

The calculator gives you the perfect starting point.
Pump to exactly those numbers for your first ride, then fine-tune ±1–2 psi based on feel and conditions.