E-Scooter & Fat-Tire E-Bike Tire Pressure Calculator (PSI & Bar by Rider Weight)
ENGINEER SUMMARY & QUICK ANSWER • TIRE PRESSURE BENCHMARK
For an 80 kg (176 lb) rider on dry pavement, inflate 8.5" and 10" electric scooter tires to 45–50 PSI (3.1–3.4 Bar), 20x4.0" fat-tire e-bikes to 20–22 PSI (1.4–1.5 Bar), and 27.5" commuter e-bikes to 40–45 PSI (2.8–3.1 Bar). Keep the rear drive wheel 2–4 PSI higher than the front.
80 kg
RECOMMENDED FRONT / REAR PRESSURE
COLD TIRE SPEC
3.17 / 3.45 Bar
REAR MOTOR WHEEL CARRIES ~60% LOAD (+3–4 PSI HIGHER)
FRONT WHEEL TARGET
46 PSI (3.17 Bar)
REAR DRIVE WHEEL TARGET
50 PSI (3.45 Bar)