Bike tire pressure calculator gives you a separate recommended pressure for the front and rear tire of MTB, e-bike, gravel, road and city bikes. It accounts for rider, bike and gear weight, tire and rim width, tubeless setup, terrain and riding style. To understand the physics behind the numbers, read our complete bike tire pressure guide.
Tire pressure in short:
- The rear wheel carries 55–65% of the total weight, so the front tire usually needs 10–20% less pressure than the rear.
- A tubeless setup allows about 7% lower pressure than a tire with an inner tube, without the risk of snake-bite flats.
- For an MTB with 29″ × 2.4″ tires on a 30 mm rim, an 80 kg rider running tubeless on trails needs about 1.45 bar front and 1.8 bar rear.
- Hookless rims have an upper limit of 5 bar (72.5 PSI) under the ETRTO standard.
Bike tire pressure calculator: front and rear tire
Results update instantly as you change the settings.
Recommended pressure
Expert mode also accounts for bike weight, rim width, casing and riding style, which can shift the result by about ±10%.
How the bike tire pressure calculator works
The calculator has two modes. Simple mode asks only for the basics and uses our reference values for everything else, while expert mode opens every parameter. Phones open in simple mode and computers in expert mode. The calculation starts from the total weight (rider, bike and gear) split between the front and rear wheel according to the weight distribution. Required pressure rises with wheel load and falls with tire width, because a wider tire has more volume and a larger contact patch at the same pressure.
Each bike type is calibrated to a reference setup that we use at the MTB Evolution bike service as the starting point when setting up our customers’ bikes:
| Bike type | Reference setup | Rear tire |
|---|---|---|
| MTB | 80 kg + 14 kg, 29″ × 61 mm (2.4″), 30 mm rim, tubeless, trail | 1.75 bar |
| E-Bike | 80 kg + 24 kg, 29″ × 66 mm (2.6″), 30 mm rim, tubeless, trail | 1.90 bar |
| Gravel | 80 kg + 10 kg, 700c × 40 mm, 25 mm rim, tubeless, gravel road | 2.60 bar |
| Road | 75 kg + 8 kg, 700c × 28 mm, 21 mm rim, inner tube, asphalt | 5.40 bar |
| City | 80 kg + 15 kg, 28″ × 42 mm, 19 mm rim, inner tube, asphalt | 3.50 bar |
Adjustments the calculator applies
- Terrain: asphalt +5%, gravel road unchanged, trail −8%, wet and mud −14%.
- Tubeless: −7% compared with an inner tube.
- Rim: about 0.8% lower for every millimeter of rim width above the reference, because a wider rim supports the tire sidewall better.
- Casing and insert: a reinforced casing tolerates 3–5% lower pressure, and an insert another 5–6%.
- Riding style: easy riding −4%, aggressive riding with jumps +5%.
- Safety limits: a minimum below which the rim hits rocks, and a 5 bar maximum for hookless rims under the ETRTO standard.
Bike tire pressure FAQ
How do I use the bike tire pressure calculator?
Choose your bike type, then enter rider weight, wheel size, tire width, terrain and whether you run tubeless. The calculator instantly shows the recommended front and rear tire pressure in bar and PSI, with a recommended range. In expert mode you can also set bike and gear weight, weight distribution, rim width, casing, insert and riding style.
Why is correct bike tire pressure important?
Correct tire pressure improves control, reduces the risk of flats, adds comfort and extends tire life. Pressure that is too low can damage the rim, while pressure that is too high reduces grip and comfort.
What is the ideal tire pressure for a mountain bike?
For an MTB with 2.3–2.5″ tires on a 30 mm rim set up tubeless, a 70 to 90 kg rider typically runs 1.3 to 1.6 bar front and 1.6 to 2.0 bar rear. With inner tubes, pressure is about 7% higher, and on harder surfaces it moves toward the upper end.
How does terrain affect tire pressure?
On asphalt, higher pressure lowers rolling resistance. On gravel roads, trails and mud, lower pressure improves grip and comfort. The calculator adjusts the recommendation automatically for the selected terrain.
Do tubeless tires need lower pressure?
Yes. Tubeless tires usually run 5–10% lower pressure than tires with inner tubes. That gives better contact with the ground, and since there is no tube to pinch against the rim, there are no snake-bite flats at lower pressure.
When should I check my tire pressure?
Check pressure before every ride, while the tires are cold. Temperature has a strong effect on pressure, so readings after a long ride or time in the sun are not accurate.
What is the maximum pressure for hookless rims?
Under the ETRTO standard, hookless rims must not exceed 5 bar (72.5 PSI), regardless of what the tire says. The calculator caps the recommendation automatically and warns you when pressure reaches that limit.