TRAXXAS X-MAXX Chrome steel right back Gear - 1pc - GPM STXM1200R/G1
1. Quality chrome metal product number of hardness of 50.2. 13 enamel spiral gear produced from high-quality chrome metal.3. When the fast begin brake stopping system system, it does not damage. The car but run efficiently. 4. merely use with spiral main gear (STXM1200FR/G). Maybe not appropriate stock low grade steel gears.