The Xiaomi M365 Pro is one of the most popular scooters in its class, but even it's not immune to breakdowns. One of the common problems is the backlash of the wheel, the creaking, or the need to replace the tire. And then owners are faced with the question: Which nut is the one that holds the wheel to the axle? The wrong approach to unscrewing it can lead to ripped edges, thread damage, or even axle breakage.
In this article, we will discuss the exact size of the nut on the front and rear wheels of the M365 Pro, how it differs from the standard M365, what tools will be needed for dismantling, and how to avoid typical errors. You will also find a step-by-step photo instruction, a nut compatibility table for different Xiaomi models and answers to frequent questions.
If you've tried to unscrew the nut and you've encountered a problem, don't rush to use force. 90% of axis damage is due to the use of the wrong keys or the wrong technique, and then you'll learn how to do it carefully and without consequences.
1. The size of the nut on the wheel Xiaomi M365 Pro: exact data
The Xiaomi M365 Pro has a 15mm hexagonal turnkey head nut (M10×1.25) threaded, standard for most of the brand’s electric scooters, but there are nuances:
- 🔧 Front wheel: left- threaded nut (clockwise unscrewed).
- 🔧 Rear wheel: right-handed nut (unwinds counterclockwise).
- ⚠️ Important: On some parties M365 Pro (2020-2021) has 14 mm turnkey nuts, which is a manufacturer's marriage. If your key doesn't fit, check the size with the barbell.
For comparison, the base model Xiaomi M365 nuts are identical in size, but often made of softer metal. in the Pro version, the nuts are reinforced with zinc coating, which reduces the risk of corrosion.
Why does it matter? Using a key that is not the right size (for example, 14 mm instead of 15 mm) leads to the "closeness" of the faces. If the nut is stuck, you better use the end key or the head with a rattle, they distribute the force more evenly.
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Before unscrewing the nut, clean the thread of dirt and lubricate it with penetrating lubricant (such as WD-40).This will reduce the risk of damage and make it easier to dismantle.
2. What is the difference between the nuts on the M365 Pro and other Xiaomi models
Xiaomi uses unified mounts for most scooters, but there are exceptions. The table below is a comparison of nuts on popular models:
| Model scooter | Size of nut (key) | Type of thread | Materials | Features |
|---|---|---|---|---|
| Xiaomi M365 | 15 mm | M10×1.25 | Steel (soft) | Often rusting, the edges lick |
| Xiaomi M365 Pro | 15 mm (less than 14 mm) | M10×1.25 | Zinc-coated steel | Reinforced construction, left/right thread |
| Xiaomi Mi Electric Scooter 1S | 15 mm | M10×1.25 | Stainless steel | Additional Loctite fixation |
| Xiaomi Pro 2 | 16 mm | M12×1.25 | Aluminum alloy | Requires a dynamometer key |
On the M365 Pro, the nuts are often fixed from the factory with a threaded locker (Loctite 243). If you feel strong resistance when unscrewing, do not use force - heat the nut with a building hairdryer (up to 80-100 ° C) to soften the lock.
Another nuisance: the rear wheel of the Pro version sometimes has a counternut (the second, thinner nut below the first one), which is easy to miss, but if you don't unscrew, the main nut won't move.
3. Tools for unscrewing the nut: what you will need
To work with the wheel nuts Xiaomi M365 Pro you will need:
- 🔧 Key 15 mm (preferably end or cape).
- 🔧 Extension for rattle (if the nut is tightened).
- 🔧 Penetrating lubricant (WD-40, Liquid Wrench).
- 🔧 A hammer and a chisel (only in extreme cases, if the nut has boiled!).
- 🔧 Dynamometer key (for tightening with the right moment).
Why can't you use a wiring key? It doesn't evenly distribute the force and often damages the edges of the nut. If you only have a wiring key on hand, wrap the nut with tape or a bicycle camera to protect the metal.
A construction hair dryer or even a lighter (carefully!) is suitable for heating a boiling nut. The main thing is not to overheat the wheel bearing.
Clean the nut and axle of dirt |Application of penetrating lubricant |Wait 10-15 minutes |Use end key 15 mm |Approach the scooter in a vertical position-->
4. Step-by-step instruction: how to unscrew the nut without damage
Follow this algorithm to avoid errors:
- Scooter lock. Place the M365 Pro on a flat surface, lock the steering wheel and brake (you can put the book under the rear wheel).
- Clean. Remove dirt from the axle and nut with a brush or cloth. If you get too polluted, use a solvent.
- Lubrication. Apply WD-40 or the analogue to the thread, wait 10-15 minutes. If you have severe corrosion, repeat the procedure.
- Unscrew: 🔄 Front wheel: turn the key clockwise (left thread!). 🔄 Rear wheel: twist the key counterclockwise (right thread).
Monitoring efforts
What do you do if the nut is licked?
- 🔨 Extractor for nuts (special tool for removing damaged nuts).
- 🔨 Tooth and hammer: carefully strike the edges of the nut to "knock" it off the spot.
- 🔨 Welding (extreme case): weld a bolt to the nut and unscrew it.
⚠️ Warning: If you break the nut and damage the axle thread, the scooter will become unsafe to drive, in which case you will need to replace the axle or install a threaded bushing (repair will cost 1,500–3,000) ₽).
What happens if you pull the nut?
5.How to tighten the nut correctly after changing the wheel
Just as important is the proper nut tightening after repair, too little puffing will lead to backlash and wheel beat, too much to damage bearings.
Recommendations:
- 🔩 Use a dynamometer key with a moment of 40–50 Nm (for M365 Pro).
- 🔩 If there is no key, tighten the nut to the end, then loosen on the 1/8 turn and tighten again.
- 🔩 The thread can be applied to the blue thread fixator (Loctite 243) to prevent self-unwinding.
After-tight check:
- Turn the wheel with your hand - it should rotate smoothly, without jamming.
- Swing the wheel to the sides - backlash should be absent.
- Drive 100-200 meters at a low speed and check if the axis is warming.
⚠️ Warning: If the wheel is hard to spin after tightening, you have pulled the nut. Weake it down immediately, or the bearings will fail in 100 to 200 km.
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The use of a thread fixer (Loctite) is mandatory when replacing nuts with the M365 Pro - this prevents them from self-unwinding while driving over irregularities.
6. Common mistakes and how to avoid them
Even experienced scooter owners make mistakes when working with nuts.
- 🔧 Using an inappropriate key (for example, 14 mm instead of 15 mm) – leads to slicing of the faces.
- 🔧 Unscrewing the nut in the wrong direction (especially important for the front wheel with left threading).
- 🔧 Excessive force – the risk of breaking the axle or damaging the bearing.
- 🔧 Lack of a thread fixator - the nut can unscrew during driving.
- 🔧 Puff without a dynamometer key - stretch or underweight.
How do you avoid problems?
Always check the direction of the thread before unscrewing (on the front wheel of the M365 Pro, the nut is marked "L" or arrow). If the nut does not respond, do not rush to use force - use lubrication and heating. After repair, be sure to check the wheel for backlash and smoothness of rotation.
If you're not sure about your abilities, you should contact the service. The cost of replacing a nut or bearing in the workshop is 500-1 500. ₽, What is cheaper than repairing axle or buying a new wheel.
7.Where to buy spare nuts for Xiaomi M365 Pro
The original nuts for the M365 Pro can be purchased:
- 🛒 Official Xiaomi stores (e.g. mi.com or branded service centers).
- 🛒 Marketplace (Wildberries, Ozon, AliExpress) – search for the nut M10×1.25 Xiaomi M365 Pro".
- 🛒 Bike parts stores - any nut with thread will fit M10×1.25 turnkey size 15 mm.
- 🛒 Auto shops – for example, wheel nuts for motorcycles or scooters.
The average price of the original nut is 150-300 ₽, analogue - 50-150 ₽. When buying, pay attention to:
- 🔍 Material (preferably stainless steel or zinc coated).
- 🔍 The direction of the thread (specify which wheel is for the front or rear wheel).
- 🔍 Availability of a fixator (some kits come with Loctite in the set).
Tip: Buy nuts with a stock — they are often lost or damaged during repairs. It is also useful to have in the set washers-grover (spring washers) that prevent self-unwinding.