Evotech Front Spindle Bobbins - Suzuki Katana (2019+) STL_192 the nylon bobbin heads are

the nylon bobbin heads are free to revolve above the aluminium inner to reduce stress on the wheel

With the additional support from the aluminium inner

Features of EP Rear Spindle Bobbins for the Kawasaki ZX-10R SE

The bobbins are fabricated from strong injection-moulded nylon and are reinforced with a press fit inner stainless steel bush to support the weight of the back end

Evotech Front Spindle Bobbins - Suzuki Katana (2019+) STL_192 the nylon bobbin heads areFeatures of EP Front Spindle Bobbins for the Suzuki Katana Designed and manufactured in the UK Injection moulded nylon bobbin head which can spin with impact Strong aluminium core gives added support Fastened by a rolled thread spindle rod Replacement bobbin heads are available for purchase What is Spindle Bobbins Crash Protection? Constructed from high quality engineering grade materials, EP Front Spindle Bobbins can protect the lower forks and brake