Xiaomi electric scooters are one of the most popular means of transportation in the city, but even such reliable models as the one that is the most popular. M365, The Pro 2 or 4 Pro, which require regular maintenance, is one of the key procedures that drives the wheels, but also safety, battery life and even top speed, but many owners are faced with the following questions: What pressure is considered optimal, what pump is suitable, how to avoid damage to the nipple and what to do if the wheel is lowering too quickly?
In this article, we will go through the entire process in detail, from tool preparation to tightness testing, and also reveal unique nuances for Xiaomi models with tubeless tires, which are often missed even in official instructions. You will learn why a pumped wheel is dangerous for suspension, how to properly “put” excess air without a pressure gauge, and what signs indicate an imminent replacement of the camera.
What pressure should be in the wheels of the electric scooter Xiaomi
The optimal tire pressure in Xiaomi depends on the model, type of coating and weight of the rider. the manufacturer specifies the standard values for most scooters - from 35 to 50. PSI (or 2.4-3.5 bar), but these numbers need to be adjusted in real conditions:
- 🛴 Xiaomi M365/M365 Pro/1S: 40–45 PSI (2.8–3.1 bar) – universal range for asphalt and weight up to 100 kilogram.
- 🏍️ Xiaomi Pro 2/4 Pro: 45–50 PSI (3.1–3.5 bar - reinforced wheels can withstand a heavy load.
- ⚠️ Xiaomi Lite/Essential: 35–40 PSI (2.4–2.8 bar) – soft tires for comfort, but the risk of punctures is higher.
It is important to note that under-performed wheels increase rolling resistance, which leads to:
- 🔋 Fast battery discharge (up to 15-20% range).
- 🛑 Deterioration of braking and handling on wet roads.
- 🔧 Accelerated wear of bearings and motor.
On the other hand, pumped tires make driving stiff, increase the risk of puncture when hitting an obstacle, and increase the load on the frame. The optimal trade-off is to adhere to the upper limit of the range for smooth asphalt and reduce pressure by 5-10% for gravel tracks or uneven surface.
Tools for swapping wheels: what you need
To pump the Xiaomi wheels, it is not enough to use a conventional bicycle pump - you need a specialized tool that takes into account the features of the Schrader nipple (automotive type) or Presta (bicycle, less common on scooter).
| Tool. | Type | What do you need? | Example of model |
|---|---|---|---|
| Pump | Manual/electric | The main tool for air injection | Xiaomi Portable Electric Air Pump, Crane Tire Pump |
| Manometer | Digital/shooting | Control of exact pressure (accuracy no more than) ±1 PSI) | Topeak SmartGauge D2 |
| Nipple adapter | Presta→Schrader | If the pump is not compatible with the scooter nipple type | Any brass adapter |
| Soap solution | Homemade (water) + soap) | Checking the leakage after pumping | — |
Particular attention should be paid to the choice of pump:
- 🔌 Electric pumps (e.g. Xiaomi Mi Portable Electric Air Pump) are convenient for regular use but require recharging and may not be able to handle pressures above 50. PSI.
- 💪 Manual pumps with a pressure gauge (for example, Topeak Mountain Morph) are more reliable for high pressure, but require physical effort.
- ⚠️ Car compressors are only suitable with an adapter and careful pressure control – they can pump the wheel in seconds.
⚠️ Warning: Never use ball or inflatable boat pumps, which are not designed for high pressure and can damage a nipple. Also avoid cheap plastic pumps, their valves often break at pressures above 40. PSI.
Step-by-step: how to pump the wheel on Xiaomi
The process of pumping the wheels seems simple, but in practice, many owners make mistakes that lead to breakdowns.
- Prepare the scooter. Put it on a flat surface, apply the brake (if any) or turn it upside down with the wheels for stability. Make sure the wheel is not loaded with weight.
- Removing the cap. On the Schrader nipple, the most common on Xiaomi, the cap rolls counterclockwise. If the cap is boiling, don't use force, moisten it. WD-40 And wait 5 minutes.
- Pump connection. Put the pump head tightly on the nipple. Press the lock lever (if any) for reliability. Make sure the connection is sealed -- if you hear the whistle of air, reconnect the pump.
- Pump air. Pump in short intervals (5-10 seconds) by periodically checking the pressure with a pressure gauge. If you use an electric pump, set a target value on the display (for example, 42). PSI).
- Pressure check. After you've been pumped, apply the soap solution to the nipple and the junction of the tire with the rim, and the appearance of bubbles indicates a leak.
Removed the protective cap from the nipple|
The pump is compatible with the type of nipple (Schrader/Presta)|
Wheel pressure checked before pumping|
The scooter is on a flat surface.-->
If the wheel is running down immediately after pumping, the problem may be:
- 🔧 Nippele - check it for wear or contamination (cleaned with alcohol).
- 🚲 Camera - puncture or crack (you need to remove the tire for inspection).
- 🛠️ Bound - burrs or corrosion damages the camera (treat with sandpaper).
💡
If after pumping the wheel "eight" (curved), lower the air to 10 PSI, align the tire with your hands relative to the rim and re-inflate it.
Frequent Mistakes and How to Avoid Them
Even experienced Xiaomi owners sometimes make mistakes when pumping wheels that lead to serious breakdowns, and here are the most common ones and ways to prevent them:
- Ignoring the recommended pressure: Many people pump the wheel "in the eye" or to the maximum indicated on the tire (for example, 65). PSI Xiaomi M365). This leads to: 💥 Risk of explosion of the chamber when heated (for example, after a long drive in the sun). 🛑 Deterioration of traction with the road (especially on wet asphalt).
Solution: Always use a gauge and stick to the values from the table above.
Pumping "cold" vs "hot" tyre pressure increases by 1-2 PSI If you pump the wheel right after the ride, the pressure will drop below normal after cooling.
Solution: Check and adjust the pressure only on cold wheels (the scooter was not used for at least 2 hours).
Nipple damage: A common problem with incompatible pumps or excessive effort when connected, signs: air is coming out through the base of the nipple, the pump is not holding.
Solution: Use Adapters for Presta→Schrader, if the pump is not suitable, if the nipple is damaged, it can be replaced (cost is about 200-300 rubles).
⚠️ Attention: If you pump the wheel down overnight, don't be in a hurry to change the camera. First, check the tightness of the nipple with soap solution, which is 60% of the time the problem is in it. For a temporary solution, you can wind the base of the nipple with FUM tape, but this will not replace a full repair.
Features of tubeless tires on Xiaomi (models 4 Pro, Pro 2)
New Xiaomi models, such as the 4 Pro or Pro 2, are equipped with tubeless tires, their main advantage is lower puncture risk and better cushioning, but pumping such wheels has nuances:
- 🔧 Sealant: tubeless tires use a special sealant (like Slime or Stan's NoTubes) that fills small punctures, and when pumped, it can flow through a nipple -- that's normal, if not excessively.
- 💨 High initial pressure, and to get a tire on the rim, sometimes you need to pump it up to 60 to 70 for a short time. PSI, and then scorch to the working value.
- ⚠️ Check the sides. If the tire is not holding pressure, make sure that the sides fit evenly to the rim.
For tubeless tires, it is critical to use a high-performance pump (e.g., Lezyne Digital Pressure Drive), as standard hand pumps may not provide the right airflow to “land” the tire.
What to do if the tire is not inflated?
How often should I check the pressure in the wheels?
Xiaomi tire pressure decreases over time, even without visible damage.
- 🌡️ Temperature changes (in winter, the pressure drops by 5-10% per week).
- 🚗 Micropore in chamber or nipple.
- 🔄 Natural diffusion of air through rubber.
Recommended frequency of inspection:
| Conditions of operation | Frequency of inspection | Notes |
|---|---|---|
| Regular driving (daily) | 1 time per week | Especially important for tubeless tires |
| Periodic driving (2-3 times a week) | 1 time 2 weeks | Control the pressure before long trips |
| Winter period (temperature below) +5°C) | Every 5 days. | Cold reduces pressure by 1-2 PSI |
| After repair (replacement of the camera, tires) | In 24 hours. | Check the tightness of the connections |
Signs that it is time to check the pressure:
- 🛑 Braking distance increased.
- 🔋 The scooter became faster discharged.
- 🎢 There was a vibration at high speed.
- 👀 Visually, the wheel looks "flattened" (bending under weight).
💡
Even if the scooter is not used, the pressure in the wheels drops by 1-3 PSI Before you first leave after a long downtime, be sure to check and adjust your blood pressure.
What to do if the wheel is moving too fast
If Xiaomi's wheel is running down in hours or days, the reasons can be different, from a simple puncture to a factory defect.
- Test the nipple, put the soap on the nipple, and watch for bubbles: 🔧 Tighten the nipple with the key (do not overdo it!). 🛠️ If the leak remains - replace the nipple (cost 150-300 rubles.).
- Camera/tyre inspection. Take off the wheel and inspect it: 🔍 Camera for punctures (immerse in water - bubbles will indicate the place of leakage). 🚲 Tyre on foreign objects (glass, nails). 🛡️ The rim on the burrs (they pierce the camera from the inside).
Rim tightness test. Pump the wheel without a tire and camera, immerse in water - bubbles will indicate cracks in the rim (no repair, only replacement).
If the camera is punctured:
- 🩹 Small punctures (up to 2 mm) can be sealed with a vulcanizing patch (for example, Park Tool). VP-1).
- 🚫 Major damage or puncture of the hippipe requires replacement of the camera.
⚠️ Warning: Do not use superglue or insulating tape to repair scooters, they cannot withstand pressure and temperature loads. Only specialized patches for bicycle cameras!