Thinner 1. 6mm graphite top deck is preferred to be used in low- to medium-traction conditions with all the aluminum chassis. The redesigned top deck works together the guts layshaft location in the middle of the framework. Made from 1.6mm graphite product, the design associated with the top deck is specifically designed to accomplish maximum traction and great steering traits on top of that. The top deck are mounted via linking stand using these flex options: 1.) Soft environment - The very best deck is not attached to the stand for maximum flex to generate maximum steering but can be more hard to drive. 2.) Medium environment - the most effective deck is attached to the stand through a ball-bearing allowing the most truly effective deck to flex side-to-side but not front-to-rear. 3.) Stiff setting - the most effective deck is connected to the stand through a hard and fast bushing that completely stiffens the complete car for increased security. Fits T4'21