Is the SILCA tire pressure calculator accurate?

Yes. This calculator implements SILCA's research-backed methodology used by professional cyclists and teams. Results are based on extensive testing and account for rider weight, tire specifications, surface conditions, and riding speed. The calculations match SILCA's published methodology.

Why does the calculator recommend pressure that seems too high or too low?

SILCA methodology accounts for modern tubeless tires and wider rims, which can run lower pressures safely. Results may differ from old pressure charts because they're personalized to YOUR exact setup - not generic recommendations. Lower pressure with tubeless tires provides better traction and comfort without pinch flat risk.

Does this work for tubeless tires?

Yes! Select "Tubeless" or "Tubeless with sealant" in the Tire Type dropdown for tubeless-specific recommendations. Tubeless tire pressure is typically 5-10 PSI lower than clincher setups because there's no inner tube to pinch. The calculator accounts for the different casing properties and lower pinch flat risk of tubeless setups.

Can I use this for MTB tire pressure?

Absolutely. The calculator supports MTB bikes with tire widths from 20-65mm and includes MTB-specific weight distribution (47% front / 53% rear). Select "MTB" in the Weight Distribution dropdown and your measured tire width for accurate MTB pressure recommendations. Typical MTB tubeless pressures range from 18-30 PSI.

How does this compare to SRAM's or other tire pressure calculators?

This calculator specifically implements SILCA's methodology with detailed surface condition options (10 levels from velodrome track to rough gravel) and pinch flat risk assessment. Different calculators use different methodologies - SILCA's approach focuses on balancing rolling resistance, comfort, and safety based on their research data.

Is there a SILCA tire pressure calculator app?

SilPSI works as a Progressive Web App (PWA), meaning you can install it directly from your browser to your phone's home screen — no app store needed. On iOS, tap the Share button and select "Add to Home Screen." On Android, tap the menu and select "Install App." It works offline after the first load and behaves just like a native app.

What tire pressure should I use for gravel riding?

Gravel tire pressure depends heavily on tire width and terrain. For a typical 40mm tubeless gravel tire with a 75kg rider, expect 30-40 PSI (2.1-2.8 BAR). Use the calculator to get exact pressures based on your weight, tire width (35-50mm for gravel), and surface conditions.

How does average speed affect tire pressure?

At higher speeds, the contribution of aerodynamic drag increases relative to rolling resistance, so the optimal pressure shifts slightly higher. The SILCA methodology accounts for this with speed adjustments from 10-35+ km/h. Recreational riders at 20-25 km/h can benefit from lower pressures.

What about road bike tires with 28mm width?

28mm road tires are the modern standard for road cycling. For a typical 75kg rider on 28mm tubeless tires on smooth roads, expect pressures around 65-75 PSI (4.5-5.2 BAR) front and rear. Measure your actual inflated tire width rather than using the labeled size for the most accurate results.

Can I use this calculator for Zipp wheels?

Yes! The calculator works with any wheel brand including Zipp, ENVE, Roval, DT Swiss, and others. The key measurement is your actual tire width when mounted and inflated on your specific wheelset.

What is a SILCA tire pressure chart?

A SILCA tire pressure chart shows recommended pressures for different rider weights and tire widths. Our Quick Reference Guide section provides general pressure ranges, but the calculator gives far more accurate results because it factors in YOUR specific setup.

Does this work with Maxxis or Pirelli tires?

Yes, the SILCA tire pressure calculator works with any tire brand including Maxxis, Pirelli, Continental, Schwalbe, Vittoria, and others. The calculator uses your measured tire width and construction type to compute pressure — the methodology applies regardless of brand.

Is the SILCA tire pressure calculator not working?

If the calculator isn't responding, try these steps: (1) Ensure all required fields are filled in, (2) Check that your weight value is within valid range, (3) Try refreshing the page, (4) Clear your browser cache. The calculator runs entirely in your browser with no server dependency.

What units does the calculator support?

The calculator supports dual unit systems: PSI (pounds per square inch) and BAR for pressure, and lbs (pounds) and kg (kilograms) for weight. Results are displayed in both PSI and BAR simultaneously.

How is front and rear tire pressure different?

Front and rear tire pressures differ because weight distribution is not equal between wheels. Road bikes typically have 45% front / 55% rear, while MTB bikes are 47% front / 53% rear. The rear tire carries more weight and needs higher pressure. The SILCA calculator automatically adjusts based on your selected bike type.

SILCA Tire Pressure Calculator

Calculate your optimal bike tire pressure using SILCA's research-backed methodology. Free online calculator for road bikes, gravel bikes, MTB, and cyclocross — supporting clincher, tubeless, and tubular tires. Get precise PSI and BAR recommendations based on your rider weight, tire width, surface conditions, and riding speed. No email or signup needed.

SILCA TIRE PRESSURE CALCULATOR

Accurate tire pressure for road, gravel, and MTB bikes. Tubeless and clincher support.

Enter Total System Weight

(Rider + Bike + Gear)

lbs

Surface Condition

Surface Guide Learn More

Measured Tire Width

Measuring Guide

Wheel Diameter

Tire Type

How does this change my tire pressure?

Average Speed

Weight Distribution

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SILCA Tire Pressure Quick Reference

These are typical pressure ranges. For precise calculations based on YOUR rider weight, tire specs, and surface conditions, use the calculator above.

Tire Pressure by Bike Type

Bike Type	Tire Setup	Typical Range
Road Bike	Tubeless	65-85 PSI
Road Bike	Clincher	70-90 PSI
Gravel Bike	Tubeless	30-45 PSI
MTB	Tubeless	22-30 PSI
Cyclocross	Tubeless	28-38 PSI

Road Bike Pressure by Tire Width (Tubeless)

Tire Width	Typical Range
23mm	75-85 PSI
25mm	70-80 PSI
28mm	65-75 PSI
32mm	55-65 PSI

MTB Pressure by Tire Width (Tubeless)

Tire Width	Typical Range
2.1"	24-28 PSI
2.3"	22-26 PSI
2.5"	20-24 PSI
2.8"	18-22 PSI

Note: These ranges assume average rider weight (70-80kg / 155-175lbs). Your specific pressure depends on rider weight, tire casing, rim width, and riding conditions. Use the calculator above for accurate recommendations.

How to Use the Calculator

1Enter Your Total System Weight

Add up your body weight, bike weight, and any gear you'll be carrying (bottles, bags, tools, etc.). You can enter the weight in either pounds (lbs) or kilograms (kg).

2Select Surface Condition

Choose the type of terrain you'll be riding on, from smooth indoor tracks to rough gravel roads. Use the Surface Guide link for help identifying your riding conditions.

3Measure Your Tire Width

Use a caliper or ruler to measure the actual width of your inflated tire (not the labeled size). Check the Measuring Guide link for detailed instructions on getting an accurate measurement.

4Choose Wheel Diameter & Tire Type

Select your wheel size (700C, 650B, etc.) and tire construction type (clincher, tubeless, tubular, or latex tube). Different tire types require different pressures for optimal performance.

5Set Average Speed & Weight Distribution

Enter your typical riding speed and select your bike type (road, TT/Triathlon, gravel, or mountain). The calculator uses this to optimize pressure for your riding style.

6Calculate & Use Your Results

Click the Calculate button to get your optimized front and rear tire pressures in both PSI and BAR.

Copy Results: Save your pressures to clipboard for reference
Share: Share your results with friends or your cycling group
Calculate New: Reset the form to calculate pressures for a different setup

⚠️Important Tips

•Always check that calculated pressures are within your tire and rim manufacturer's recommended ranges
•Start conservative (slightly higher) and adjust based on feel and performance
•Pay attention to pinch flat risk warnings and follow the recommendations
•Use a quality pressure gauge for accurate inflation

Tire Pressure Guides by Bike Type

Detailed tire pressure guidance for every cycling discipline, powered by SILCA methodology.

Frequently Asked Questions

Have more questions? Visit our contact page to get in touch.