BAYFIT GEAP Dirt Bike Inner Tube 18-inch TR4 Valve Fits 110/100-18–130/80-18 Durable Rubber

BAYFIT GEAP 18-inch dirt bike inner tube designed to fit multiple 18" tire sizes including 110/100-18, 120/80-18 and 130/70-18 for reliable air retention on off-road rides.

This heavy-duty inner tube is engineered to work across a broad range of 18-inch dirt bike and motorcycle tires, simplifying spares and replacements for riders, mechanics, and fleets. Constructed from resilient rubber and fitted with a TR4 straight valve stem, the tube balances durability with easy inflation. The design covers common competition and trail tire widths, making it a sensible choice when you need a dependable replacement that fits several sizes.

Which tire sizes will this inner tube work with?

The BAYFIT GEAP tube accommodates many 18" tire designations so you can keep one spare for different bikes. It fits 110/100-18, 100/100-18, 120/80-18, 120/90-18, 130/70-18, 130/80-18 and classic sizing like 4.10/4.60-18, 4.00/4.50-18 and 3.50-18.

• Compatible nominal tube sizes: 18x1.95 and 18x2.125.
• Works across both narrow and mid-width dirt bike tires.
• Good for standard motorcycle and off-road tire profiles.

How does the TR4 straight valve help me in the field?

The TR4 straight valve stem offers a common, service-friendly connection for pumps and compressors, simplifying inflations after repairs or adjustments. Its straight profile helps when you use standard valve tool accessories and when fitting into many wheel types.

• Easy to access with standard pump heads and compressors.
• Secure valve seating reduces slow leaks when tightened properly.
• Compatible with valve caps and removable core tools for fast service.

What construction features improve durability and puncture resistance?

This tube is made from a tough rubber compound designed to withstand repeated use and rough conditions without excessive stretching. While no tube is puncture-proof, the thicker material and quality manufacture help reduce the chance of pinch flats and small road debris punctures when mounted and inflated correctly.

• Durable rubber formulation for longer service life.
• Precision molding for consistent wall thickness and fit.
• Recommended pairing with proper tire pressure and rim care to minimize damage.

How easy is it to install or replace this inner tube?

Installation follows the same basic steps as most inner tubes: partially seat the tire, insert the tube with the valve aligned, then fully seat and inflate to the manufacturer’s tire pressure. The tube’s compatible sizes and standard TR4 valve make the process straightforward for home mechanics and pros alike.

• Partially inflate the tube to reduce pinching during mounting.
• Align the TR4 valve through the rim hole before final seating.
• Check tire beads and rim tape to avoid sharp edges that can harm the tube.

Who is this for? Riders, race teams, and repair shops that need a versatile spare for 18" wheels will find this BAYFIT GEAP inner tube practical and cost-effective. It's ideal for those who want one dependable tube that fits multiple tire widths—trail riders swapping tires between bikes, pit crews keeping compact spares, and mechanics servicing a variety of 18-inch motorcycles. Keep a couple in your toolkit for faster roadside fixes and fewer interrupted rides.