Description
Electric Scooter Inner Tube HAKUBA 8 1/2x2 (8.5x2) Bent Valve AV Cure
Thick rubber HAKUBA inner tube, size 8 1/2x2 (8.5x2 inches / ETRTO 50-134) for installation in pneumatic wheels of electric scooters, strollers, and balance bikes with an 8.5-inch rim diameter. The main feature of this model is the bent metal car valve (Schrader AV Cure), which ensures a comfortable connection for a pump hose or compressor in the limited space of the rim.
What is the difference between the HAKUBA 8 1/2x2 AV CURE (bent) and the straight valve model?
The valve type determines which wheel and rim the tube will fit without kinks or damage:
- Bent Valve (AV Cure): The metal stem is bent at an angle to the side. This is necessary for **rear wheels** (or motor wheels with tight layouts) where a straight valve either hits the motor housing/brake disc or cannot be clamped by the pump nozzle.
- Straight Valve (AV straight): Primarily used on front non-motor wheels where the rim hole is located parallel to the plane of rotation.
Key Advantages and Features:
- Inflation Convenience (AV Cure): The bent valve stem extends outside the rim, allowing the pump hose to be easily screwed on without using a special flexible adapter.
- Car Valve (Schrader / AV): Compatible with all standard bicycle and car pumps, as well as electric compressors.
- Wear-resistant Butyl Rubber: Features increased elasticity, resists friction against the inner walls of the tire well, and reliably holds high pressure.
Compatibility and Application:
- Electric Scooters (8.5 inches): Xiaomi Mijia M365, M365 Pro, Pro 2, 1S, Essential, Mi Electric Scooter 3 (especially for the rear wheel); Kugoo S1, S2, S3, S4, M2 Pro; Ninebot, Joyor, Halten, and similar models with 8 1/2x2 tires.
- Strollers and Balance Bikes: Strollers and universal baby carriages with 8.5" pneumatic wheels (Tutis, Adamex, Anmar, Tako, Bebe-Mobile, etc.), where a straight valve interferes with the plastic rim spokes.
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), bent (CURE) |
| Rim Seat Diameter | 8.5 inches (~134 mm) |
| Material | Elastic butyl rubber |
Package Includes:
- HAKUBA 8 1/2x2 AV Cure inner tube (bent valve) — 1 pc.
Installation Tip: When replacing the inner tube, orient the valve bend in the correct direction relative to the rim hole before seating the tire beads. The valve should not experience bending stress from the edge of the metal rim walls.
