Kenda motorcycle inner tube 100/100-18 (400-18) Red — 2.5mm Tuff butyl, TR-6 valve, heavy-duty puncture resistance

Kenda 677052B8 is a red, heavy-duty 2.5mm butyl inner tube engineered to reduce punctures and pinch flats for 100/100-18 (400-18) motorcycle wheels.

This replacement tube is built for riders who need a tougher inner tube than stock—especially off-road and motocross riders who routinely face rough terrain. Constructed from premium butyl rubber with a straight metal TR-6 valve stem, the 2.5mm Tuff tube offers extra thickness where it matters to help resist cuts, punctures, and pinch-type flats while remaining compatible with standard 18-inch rims sized 100/100-18 (400-18).

How does this tube perform compared with standard OEM tubes?

The Kenda Tuff tube is roughly twice as thick as many original equipment inner tubes, increasing resistance to abrasions and prick punctures without sacrificing fit. Its heavier wall helps prevent pinch flats caused by sharp impacts or underinflation.

• 2.5mm thick butyl construction for added durability
• Designed specifically for motocross and off-road stresses
• Straight metal TR-6 valve stem for reliable inflation
• Compatible with 100/100-18 (400-18) rim sizes

Will this tube fit my bike and tire setup?

This tube fits tires and rims that specify a 100/100-18 (sometimes listed as 400-18) size and uses a straight metal TR-6 valve; check your rim hole diameter and tire width before ordering. It's intended for 18-inch motorcycle wheels common on many dirt bikes and dual-sport machines.

• Size: 100/100-18 (400-18) — confirm tire sidewall markings
• Valve: straight metal TR-6 — ensure rim compatibility
• Use case: motocross, off-road, trial, and dual-sport bikes
• Installable with regular tire irons and tube-changing tools

How does installation and maintenance differ for a thicker tube?

Installation follows the same basic steps as a standard tube, but take care to avoid pinching when seating a thicker wall. Use proper lubrication, warm the tire if cold, and inflate slightly to shape the tube before fully seating the bead.

• Slight pre-inflation helps the tube seat without folds
• Use tire levers carefully to prevent valve or wall damage
• Check bead seating and inflation pressure after first ride
• Inspect regularly for cuts or worn areas despite extra thickness

What are the material and durability features I should expect?

The tube is molded from premium butyl rubber chosen for air retention and puncture resistance; the Tuff variant increases wall thickness in critical areas. While no tube is invulnerable, the reinforced design extends service life and reduces roadside repairs.

• Premium butyl rubber offers improved air-holding properties
• 2.5mm thickness provides stronger resistance to pinch flats
• Metal TR-6 valve for secure, reliable inflation
• Engineered for the impacts and debris common in off-road riding

Who is this for: The Kenda 677052B8 Tuff tube is ideal for motocross and off-road riders, trail riders, and anyone who prefers a more puncture-resistant replacement than OEM inner tubes. Choose this tube if you want a straightforward, heavier-duty inner tube that fits 100/100-18 (400-18) tires with a straight TR-6 valve and reduces the frequency of puncture and pinch-flat repairs during rugged use.