Motorcycle inner tubes restore air retention and cushioning that keep a tyre working safely. For riders who need a straightforward replacement that preserves tyre shape and ride comfort, CMPO Inner Tube suits routine maintenance and roadside repairs. Is this the correct size and valve type for your bike?
⚡ At a Glance
- • Durability: Rubber construction holds air pressure and cushions the tyre to help maintain shape under load
- • Best for: Motorcycles that use 3.25 x 18 inner tubes, including models listed as UM125-DEX
- • Not ideal for: Tyres of a different size or wheels that require a different valve position
A 3.25 x 18-inch rubber inner tube fitted with a centre rubber valve. Designed to hold air, cushion the ride and maintain tyre shape for compatible motorcycles.
Reliable air retention – with rubber construction
A rubber tube sits inside the tyre and forms a seal between the tyre and wheel, trapping air pressure required for normal operation. The centre rubber valve provides a central access point for inflation.
Maintains inflation between services so handling remains predictable and safe while riding.
Improved ride comfort – thanks to cushioning rubber
Elastic rubber absorbs small bumps and road irregularities by deforming under load and returning to shape. That cushioning effect helps the tyre keep its contour under weight.
Reduces vibration and road shock for steadier handling and less rider fatigue on longer journeys.
Straightforward replacement for compatible bikes – with centre rubber valve
Supplied in a 3.25 x 18 size and specified for UM125-DEX compatibility, fitted with a centre rubber valve for typical wheel setups. Installation requires removing the tyre, seating the tube, and inflating via the centre valve.
Enables quick swaps on matching tyres and valves, handy for routine maintenance and roadside repairs.
✨ The 4 Key Reasons for CMPO Inner Tube
- Centre Rubber Valve – Allows secure inflation and straightforward fitting on compatible wheels
- 3.25 x 18 size – Matches 3.25 x 18 tyres commonly used on smaller motorcycles
- Rubber Construction – Provides cushioning to absorb road shocks for smoother rides
- Simple Tubing Replacement – Swaps in quickly during roadside repairs with basic tools
📋 Technical Details at a Glance
- Category: Tyres and Wheels > Inner Tubes and Tyre valves > Inner Tubes
- Product type: Inner tube
- Brand: CMPO
- Size: 3.25 x 18 inch
- Valve: Centre rubber valve
❓ Frequently Asked Questions
Q: Will this inner tube fit my motorcycle tyre?
A: The inner tube is sized 3.25 x 18 inch and is described for UM125-DEX compatibility; confirm those dimensions match your tyre before fitting.
Q: What valve type does it use?
A: A centre rubber valve is fitted for inflation and seating in compatible wheels.
Q: What material is the tube made from?
A: Construction is rubber, designed to hold air pressure and cushion the tyre.
🏆 Our Verdict
The CMPO Inner Tube is suitable for riders who need a direct replacement for 3.25 x 18 tyres, particularly owners of models listed as UM125-DEX. Rubber construction combined with a centre rubber valve makes for reliable inflation retention and simple fitting. A practical spare that can prolong tyre life and reduce the risk of roadside failures.
