Scooter Tire Pressure: Finding the Right Value, and Why It Matters
The correct tire pressure for your electric scooter is the one recommended by the scooter manufacturer or the tire manufacturer if you have changed the tire model. There is no universal number, as it depends on the tire, the rim, the rider's weight, and the intended use. What is universal is the method for checking the pressure, and the effects of incorrect pressure on handling, braking, the risk of punctures, and battery range. This guide explains these aspects.
The essentials
- The reference value can be found in the scooter's manual or in the manufacturer's recommendations for the tire.
- The number printed on the tire sidewall indicates the maximum pressure, not the recommended pressure for use.
- Always measure the temperature when the motor is cold, before riding, using a reliable pressure gauge.
- An underinflated tire can pinch its inner tube, causing it to overheat and making steering difficult; an overinflated tire will bounce more and provide less grip.
- Tires naturally lose air: checking them once a week is a good habit.
Where to find the best value
In order, here are the resources to consult:
- The manual for your scooter provides the recommended tire pressure for the originally mounted tire. It takes into account the rim and the intended load.
- The manufacturer's recommendations for tire pressure, if you have installed a tire other than the original one. A mini-moto tire with a rigid casing may not inflate in the same way as the original tire (see our guide for choosing a scooter tire). For our PMT tires, we refer to the recommended pressure specified by PMT for the chosen compound, as indicated on the product sheet for the PMT Junior 90/65-6.5.
- The tire sidewall, which generally indicates the maximum pressure. This value should never be exceeded, but it is not the recommended operating pressure.
Start with the recommended value, then adjust it slightly based on your weight and how it feels, but always stay within the limits specified by the manufacturer.
Why is tire pressure so important for an electric scooter?
A scooter with small wheels has a small air volume in the tire. Therefore, even a small air leak significantly changes the tire's shape and how it contacts the ground. On a heavy and fast machine, this difference is immediately noticeable.
| Pressure | What's happening | Consequences |
|---|---|---|
| Too low | The tire collapses, and its sidewalls flex significantly | Heavy and imprecise steering, tire overheating and wear on the edges, pinch flats, risk of tire bead separation during turns, reduced range |
| Correct | The tire maintains its intended shape and tread pattern | Precise handling, stable braking, even wear |
| Too high | The tire becomes harder, and the contact patch on the ground decreases | Bouncing on bumps, reduced grip, especially on wet surfaces, wear in the center of the tire, and decreased comfort |
The energy consumption follows the same pattern: an underinflated tire deforms more with each rotation of the wheel, and this deformation consumes energy that would otherwise come from the battery.
Measure accurately
The pressure of a gas increases when it heats up. After a ride, the tire is warm, and the pressure gauge will display a value higher than the actual "cold" pressure. If you deflate the tire at this moment, it will be underinflated once it cools down.
- Measure the tire pressure before riding, or after several hours of inactivity, especially if the scooter has been parked in the sun.
- Use a separate, high-quality pressure gauge: those found on station pumps and compressors are often inaccurate.
- Get used to the units of measurement used by your pressure gauge (bar or psi) and those specified in your manual to avoid conversion errors.
- Always tighten the valve cap: it protects the valve from dust, which can eventually cause it to leak.
The valves on the smaller wheels can sometimes be difficult to reach between the arm and the disc. A valve extension or a angled valve cap makes inflation easier; make sure it is securely tightened and does not leak.
Tubeless vs. Inner Tube Tires: Some Key Differences
With a tire tube, excessively low pressure primarily results in pinch flats: upon impact, the tube is crushed between the tire and the rim, causing it to tear. Our guide on electric scooter punctures shows how to identify them. With tubeless tires, there is no tube to pinch, but an underinflated tire can detach from the rim when cornering (this is called "rolling off the bead") and lose air suddenly. In both cases, the correct tire pressure is the best protection.
And what about on a track?
On the track, tires heat up much more than on the road, and the pressure increases accordingly. Riders therefore start with a cold pressure and then adjust it based on the tire temperature measured after each run, following the recommendations of the tire manufacturer. This is a specific adjustment, detailed in our guide on slick tires for track use. On the road, maintain the recommended pressure: your tires do not reach those temperatures.
Workshop tip
Many scooters that come to us with "steering problems" or "pulling to one side" simply have an underinflated tire. Before suspecting the steering column or the bearings, check the tire pressure of both wheels. It's free, takes a minute, and it's the first item on our monthly maintenance checklist. All our tires are in the tires category.
Frequently Asked Questions
Why are my tires losing air without a puncture?
Air slowly permeates the rubber, and a valve may leak slightly. A gradual loss of pressure over several weeks is normal; a loss of pressure within a few days indicates a leak that needs to be investigated (valve, bead on tubeless tires, small puncture).
Should the tire pressure be the same for the front and rear tires?
Not always: the rear wheel often carries more weight. Follow the values provided by the manufacturer for each wheel; if no information is provided, start with the same value and adjust based on your own experience.
Should I inflate the tires more if I am heavier?
A heavier rider will compress the tire more, and a slightly higher pressure can partially compensate for this, but it should never exceed the maximum pressure indicated on the tire's sidewall. If your manual provides pressure recommendations based on load, follow those guidelines.
Is a gas station air compressor suitable?
To inflate, yes, but with caution: the flow rate is high, and a small tire can easily overinflate. Then, check the pressure with your own pressure gauge.