LIGHT WEIGHT WHEEL SHAFT (2pcs/IF15-2/IF15-2W) Wheel shaft for IF15-2 with a hybrid structure of hard-anodized A7075 for the main body and titanium for the axle shaft threads, achieving a high level of strength and weight reduction. Weight reduction of 1.9g compared to the normal steel (4.5g); about 10g reduction in rotating mass for one unit.