Traxxas Steel Wide-Face Mod 1.0 Spur and Pinion Gear. Constructed from high strength hardened and machined steel, these gears can handle the most extreme conditions. Adding to the durability are the extra-wide gear teeth giving you more engagement and strength, keeping you from the dreaded stripped or broken spur gear. Traxxas spur gears let you fine-tune the performance of your Traxxas model. Changing gear ratios can help balance acceleration and top speed for different running conditions. Package includes one spur gear and one pinion gear.