17mm Wheel Hub and Caps x 4 Set of 4 replacement wheel hubs to fit 1/8 scale models. This set includes hubs, caps and pins. This set does not use grub screws to secure the pins in place. When the wheel is over the hub the pin will be held in place. Inner diameter measures 8mm Length of the hub 13.3mm 17mm hub (measured across the flats) 12mm across the threads Material: Alloy Colour: Please select above.