Description
HAKUBA 8 1/2x2 (8.5x2) Inner Tube for Electric Scooter with Straight AV Car Valve
Thick rubber HAKUBA inner tube, size 8 1/2x2 (8.5x2 inches / ETRTO 50-134) — the most popular spare tube for standard 8.5-inch wheels of electric scooters, strollers, and balance bikes. Equipped with a straight metal car valve (Schrader / AV), ensuring a tight connection with the pump and reliable air retention.
What is the difference between HAKUBA 8 1/2x2 (straight AV) and models with a curved valve?
Please pay attention to the valve type when selecting an inner tube for your scooter:
- Straight valve (AV straight): This model has a straight valve core. It is ideal for the front wheel of most electric scooters (e.g., Xiaomi M365), where the valve comes out directly through a special hole in the rim.
- Curved valve (AV Curved): Models with a bent valve are more commonly used on rear motor wheels with tight layouts, where a straight valve would hit the motor housing.
Key Advantages and Features:
- 8.5-inch factory standard: An exact analog of stock inner tubes for the Xiaomi electric scooter line and their numerous clones.
- Car valve (Schrader / AV): Allows inflating the wheel with a standard bicycle pump, car pump, or gas station compressor.
- Elasticity and durability: Made of wear-resistant butyl rubber, which effectively dampens minor vibrations when riding on tiles and asphalt.
Compatibility and Application:
- Electric scooters (8.5 inches): Xiaomi Mijia M365, M365 Pro, Pro 2, 1S, Essential, Mi Electric Scooter 3; Kugoo S1, S2, S3, S4; Speed Savage, CAROMA, and other analogs with 8 1/2x2 (50-134) tires.
- Strollers and balance bikes: Strollers with 8.5-inch pneumatic wheels (Tutis, Adamex, Anmar, Tako, etc.).
Technical Specifications:
| Parameter | Value / Specification |
|---|---|
| Brand / Manufacturer | HAKUBA |
| Part Type | Pneumatic wheel inner tube |
| Marking (inches) | 8 1/2 x 2 (8.5x2.0) / 50-134 |
| Valve Type | Car (Schrader / AV), straight |
| Rim Seat Diameter | 8.5 inches (~134 mm) |
| Material | Elastic butyl rubber |
Package Includes:
- HAKUBA 8 1/2x2 AV inner tube (straight valve) — 1 pc.
Puncture prevention tip: The main cause of frequent punctures on Xiaomi scooters is riding with low pressure, which causes the tire to "rub" the inner tube from the inside. Maintain a working pressure of at least 3.5–4.0 atm (depending on the rider's weight) and regularly check the inner tire casing for sand or grit.
