(2-Pack) 3.25/3.50-16 (90/100-16) Dirt Bike Inner Tube TR4

GDHSWJ's 2-pack 3.25/3.50-16 (90/100-16) dirt bike inner tubes are heavy-duty natural rubber tubes with metal TR4 valve stems designed to deliver reliable air retention and shock absorption for 16" off-road tires.

These replacement inner tubes fit common 16" dirt bike tires and are built for pit bikes, trail bikes, and light off-road motorcycles. Constructed from 2mm natural rubber and fitted with straight metal TR4 valve stems, the tubes prioritize durability, waterproofing, and stable pressure retention. They are supplied as a two-pack so you can swap a spare quickly or equip two wheels with matching tubes.

Which tire sizes and models does this 2-pack fit?

The tubes are sized for 3.25/3.50-16 tires (listed as 90/100-16) and match most standard 16" dirt bike rims. Compatibility covers a wide range of small-displacement off-road bikes and pit bikes.

• Fits tire sizes: 3.25-16 and 3.50-16 (90/100-16).
• Common fitment: Honda CRF150F, CR85R; Suzuki DRZ125L; Kawasaki KLX125L, KLX140L.
• Also suitable for many pit bikes, trail bikes, and light motocross machines with 16" wheels.

How durable and puncture-resistant are these inner tubes?

Made from 2mm-thick natural rubber, the tubes offer good elasticity and impact absorption without becoming overly stiff. While not puncture-proof, the thicker rubber and quality manufacturing improve resistance to pinch flats and minor cuts common in off-road use.

• 2mm natural rubber construction for enhanced shock absorption.
• Waterproof rubber reduces air loss and improves pressure stability.
• Metal TR4 valve stem resists bending and leakage during mounting.

What advantages does the TR4 metal valve stem provide?

The straight TR4 metal valve stem gives a firmer, more secure connection than some rubber stems, helping to prevent leaks and stem damage during wheel changes or high-vibration use. Metal stems also make tire inflation and pressure checks easier and more reliable.

• Sturdy metal construction minimizes stem bending and damage.
• Secure, airtight seal reduces slow leaks and maintains pressure.
• Simplifies pump attachment and repeated inflation cycles.

How should I select and install these tubes for best results?

Choose the tube size that matches your tire markings (3.25/3.50-16 or 90/100-16). Inspect the rim, tire bead, and inside surface for sharp objects before installation, and inflate gradually while checking bead seating. Use proper tire levers and avoid pinching the tube.

• Confirm tire marking 3.25/3.50-16 (90/100-16) before purchase.
• Inspect rim strip and tire interior for debris or sharp edges.
• Inflate slowly and check for leaks after seating the bead.

Who is this for: Riders who maintain 16" dirt bike wheels and want an affordable, dependable spare or replacement. The GDHSWJ two-pack suits hobbyists, pit crews, and trail riders looking for simple, robust inner tubes that balance flexibility, water resistance, and a durable metal valve stem. These tubes are ideal for routine maintenance, quick roadside repairs, or swapping into a bike used on varied off-road terrain where stable air pressure and reliable valve performance matter.

Product features at a glance:

• 2-pack of 3.25/3.50-16 (90/100-16) inner tubes
• 2mm natural rubber for elasticity and shock absorption
• TR4 straight metal valve stem for secure, airtight inflation
• Waterproof construction to reduce air loss
• Compatible with many small dirt bike models and pit bikes