TKR5115 – Spur Gear (44T, hardened steel, lightened) Worried about stripping your plastic spur gear? Well we have got you covered. This Hardened steel spur will never get dirt or small pebbles in bedded in it like its plastic counter part. We also recommend this spur as a necessity to any traktion drive/electrik clutch setup for durability purposes. *Note: Your car will be noticeably louder with this spur gear and we recommend replacing your Pinion when installing a metal spur to get the best possible mesh and smoothest/quietest result.