AR-PRO replacement inner tubes 2.75/3.00-21 (2-Pack) TR4 straight valve — heavy-duty butyl, fits 80/100-21

Replace worn or damaged inner tubes quickly with this AR-PRO two-pack engineered for 21" motorcycle wheels. Each tube is moulded from thick, premium butyl rubber and fitted with a TR4 straight valve stem so it matches common 21" tire configurations (80/100-21, 90/80-21, 90/90-21, 100/80-21). These tubes prioritize durability and straightforward installation so you can get back on the road or trail without fuss.

Will these inner tubes fit my 21" motorcycle tire?

Yes — these AR-PRO tubes are sized to accommodate rim diameters of 21 inches and tire widths of 2.75" to 3.00". They cover common tire size designations such as 80/100-21 and 90/90-21, making them a direct replacement for many off-road and dual-sport front wheels.

• Compatible with 2.75/3.00-21 rim widths.
• Fits 80/100-21, 90/80-21, 90/90-21, 100/80-21 tire markings.
• Supplied with TR4 straight valve stems for standard rim holes.
• Sold as a convenient 2-pack for spares or front/rear swaps.

How durable and puncture-resistant are these tubes?

The inner tubes are manufactured from heavy-duty butyl rubber, which is thicker than economy tubes and absorbs impact better. While no tube is completely puncture-proof, thicker butyl helps slow down punctures and can hold air longer after minor damage.

• High-grade butyl rubber construction resists abrasion and aging.
• Extra wall thickness provides improved shock absorption.
• Designed to form an airtight seal quickly if compromised.
• Suitable for varied weather and trail conditions when used with proper tires.

How easy is installation — do I need special tools?

Installation is straightforward and can be completed with common tire levers and a pump in under five minutes for experienced users. No specialty tools are required; simply remove the wheel, take out the old tube, seat the new tube evenly, inflate slightly to eliminate pinches, then fully inflate to the tire’s recommended pressure.

• Standard TR4 valve fits common rim holes — no adapter needed for most setups.
• Can be mounted with basic tire levers and an air pump or compressor.
• Quick-change design makes it ideal for trail-side spares.
• Two tubes included so you can carry a spare or replace both wheels.

What should I check before ordering these inner tubes?

Confirm your wheel diameter is 21 inches and that your tire width falls between 2.75" and 3.00". Also check that your rims accept a straight TR4 valve stem and that the tube’s sizes match any markings on your existing tires for proper fit and safety.

• Verify tire sidewall markings (e.g., 80/100-21) match listed compatibilities.
• Ensure your rim valve hole suits a straight TR4 stem.
• Consider carrying one tube as a spare if you ride remote trails.
• Replace both tubes if both show age or wear for balanced performance.

Who is this for: Riders who need a reliable, value-minded replacement for 21" motorcycle inner tubes — especially off-road, dual-sport, and trail riders who prioritize durability and quick changes. The AR-PRO 2.75/3.00-21 2-pack is suited to mechanics, weekend adventurers, and anyone who wants thicker butyl rubber, straightforward TR4 valve compatibility, and the convenience of two ready-to-use tubes in one purchase.