Attached through the wheel spindles of the Ducati Streetfighter V4 S, Evotech Spindle Bobbins offer crash protection to the wheel spindle retainers, brake calipers, lower forks and swingarm. Spindle bobbins of black injection-moulded nylon sit either side of the wheel intending to be first to receive impact should an unlikely incident occur. The bobbins sit upon an aluminium inner, which improves strength, whilst the bobbins are still free to move with impact to reduce stress and wear.