REAR AXLE 50X2X1030MM Stiffness:C1.5 - Soft which means that your required

which means that your required kart seat size is unaffected by the addition of a P1 rib protector

Inside the P1 is carefully shaped of highly technical composite panels designed to spread the load perfectly over the whole ribcage and always retain their shape even on a hot day and the internal anti shock foam contributes to an ultra high level of load spreading over the whole ribcage

T14VG Seats - Medium/Soft Rigitity for Smaller race drivers

The Tillett P1 affords you the highest level of rib protection and comfort available without increasing the thickness

REAR AXLE 50X2X1030MM Stiffness:C1.5 - Soft which means that your required