Grom/Z125 Chain and Sprockets Rear Sprocket Size:39 * No color options are

* No color options are available at this time

All Superlite steel sprockets meet or exceed O

they are chemically etched to give them a uniform

This process also provides corrosion resistance

All existing chains should be checked for wear (stretched

Grom/Z125 Chain and Sprockets Rear Sprocket Size:39 * No color options areAll ProSeries Sprockets are Made in the USA from the harder grade 7075 T6 certified aero space industry aluminum for long life and light weight. They are machined to exact specs with tolerances much more stringent than other aluminum sprockets and many times tighter than OE sprockets. What this means is that your chain will fit the sprocket better and everything will last longer. Additionally, they are chemically etched to give them a uniform, even