Image 1 of 1 Arrma Pinion Gear 21t Mod 0.5 CNC 2.3mm Bore ARA311207 $5.99 Arrma Pinion Gear 21t Mod 0.5 CNC 2.3mm Bore ARA311207 Add To Cart Added! Arrma Pinion Gear 21t Mod 0.5 CNC 2.3mm Bore ARA311207 You Might Also Like Quick View ProTek RC 48P Lightweight Hard Anodized Aluminum Pinion Gear (3.17mm Bore) (34T) $5.99 Sold Out Quick View eXcelerate ION Aluminum 64p Pinion Gear (3.17mm Bore) (44T) $9.99 Quick View ProTek RC 48P Lightweight Hard Anodized Aluminum Pinion Gear (3.17mm Bore) (31T) $5.99 Quick View Hot Racing 64P Hard Anodized Aluminum Pinion Gear (1/8" Bore) (56T) - HRAHRG6456 $8.88 Quick View ProTek RC 48P Lightweight Hard Anodized Aluminum Pinion Gear (3.17mm Bore) (18T) PTK-8605 $5.99