The framework features additional holes enabling to move the whole suspension system system more ahead to boost the wheelbase in regards to the car. The framework features 3 wheelbase modification jobs. The entire backward destination fits 1st X1 framework wheelbase. An added two additional functions operates the wheelbase the vehicle by 4 and 8mm. The longer the wheelbase is, the car is more stable and safer to push. None the less a lot longer wheelbase decreases automobile response, rotation and steering. Shorter wheelbase is preferred for smaller technical tracks and longer for substantially more available tracks. The 2.5mm framework & top deck are made of good graphite product.