Valve stems are a critical tyre safety component. This range covers tubeless alloy and rubber stems across 8.3mm and 11.3mm hole sizes, with installation tools from Ariete, LA Corsa, Whites Motorcycle Parts, Bolt, Link and CPR to suit road and off-road tubeless wheel setups.
Bolt Rim Lock & Valve Stem Seals
TUBELESS VALVE STEM INSERTER - EA
Whites Valve Stem Seal Install Tool Set
WHITES TYRE VALVE STEM INSERTER
WHITES TYRE VALVE STEM REPAIR TOOL
Choosing the Right Valve Stem
The correct valve stem is determined by two fixed measurements: the rim hole diameter and the tyre type. Most tubeless motorcycle rims use either an 8.3mm or 11.3mm valve hole. Fitting the wrong diameter causes air leakage at the base seal that no amount of tightening will fix.
Alloy vs Rubber Stems
Alloy stems are the standard choice for tubeless motorcycle wheels. They seat against the rim with a tapered or flat-washer seal, torqued to spec (typically 3-4 Nm), and resist centrifugal forces at road speed. At sustained highway speeds above 100 km/h, alloy construction is the correct specification. Rubber snap-in stems suit slower-speed ATV applications where centrifugal load is lower.
| Spec | 8.3mm Alloy Stem | 11.3mm Alloy Stem |
|---|---|---|
| Rim hole diameter | 8.3mm | 11.3mm |
| Construction | Aluminium alloy | Aluminium alloy |
| Tyre compatibility | Tubeless only | Tubeless only |
| Typical application | Road, sport, adventure | Road, cruiser, larger rims |
| Sold as | Pair (2pk) | Pair (2pk) |
Installation
A valve stem inserter pulls the stem through the rim hole from the tyre side, ensuring the base taper seats correctly. Replace valve stems every tyre change; a stem torqued and heat-cycled through one tyre service life should not be reused.
Brands
Ariete produce OEM-specification alloy stems in 8.3mm and 11.3mm formats, sold in 2-packs. LA Corsa offers anodised alloy stems in black and blue finishes. Whites Motorcycle Parts and CPR cover the service-part market, while Link and Bolt supply rim lock seal kits for off-road fitments.
Frequently asked questions
What valve stem hole size do I need for my motorcycle?
Most tubeless motorcycle rims use either an 8.3mm or 11.3mm valve hole. Check your rim specification or measure the existing hole before ordering. Fitting the wrong size will prevent the base seal from seating correctly.
Do I need a special tool to fit a tubeless alloy valve stem?
Yes. A valve stem inserter or driver tool is required to pull the stem through the rim hole from the tyre side without damaging the alloy taper or the rim edge. Attempting to force a stem through without the correct tool risks deforming the base seal.
How often should valve stems be replaced?
Replace valve stems every time you fit new tyres. A stem that has been torqued and subjected to heat cycles for one full tyre service life should not be reused. Reusing an old stem risks slow leaks that are difficult to diagnose on the road.