Got the hub, got the tread, time to fill ‘er up! Save more with our Pack Deals: discount automatically applied at checkout! Add 2 to your cart, save $4. Add 4 to your cart, save $12. Evolve 7 inch Inner Tube Evolve’s inner tubes have been designed to work with our hubs & tyres. Offering supreme durability designed specifically for use with Evolve Electric Skateboards. These are the tubes to use to keep you rolling! We recommend you keep your tyre pressure at 40-45psi. If you notice any decrease in your range, be sure your tyres are pumped up! More info here . This listing is for 1 x tube. Fits 7" Evolve GT tires , not compatible with 8" MBS T3 Knobby, or 8" MBS Roadie Tire or 6" Evolve GTR tires. Sold individually!