The folding bead on this model makes it lighter than the steel bead on the standard Marathon Racer. It has good tread depth and uses the SpeedGrip compound for the best handling characteristics and lifespan. Raceguard Nylon fabric under the tread giving excellent puncture protection. The Tanwall tyres offers your Brompton a unique look with its tan sidewalls and ensures your bike looks as good as it feels to ride.