【Heavy-Duty, Leak-Resistant】100/90-18 inner tubes use premium butyl rubber, composition plus thickened sidewalls makes them puncture and explosion-resistant. They have excellent air retention/hold air for up to 90 days
【Durable & Leak-resistant Valves】TR4 straight valves are fitted into thick valve seats for enhanced durability. Pure copper dust caps have built-in rubber seals that keep out dust and water can function as a tool to remove the valve core
【Better Shock Absorption】350/410-18 inner tubes use Butyl adds to more stretch, shock absorption, impact and puncture resistance for a smoother ride
【Package Includes】2 x 3.50/4.00-18 inner tubes with TR4 straight valves + 2 x Red Stem Valve Caps + 2 x Black Stem Valve Cap + 1 x Valve Core Wrench + 5 x Brass Valve Stem Cores