Grom/Z125 Chain and Sprockets Rear Sprocket Size:39 The Superlite RS7 Series rear

The Superlite RS7 Series rear sprocket is the #1 selling steel racing sprocket on the market today

All existing chains should be checked for wear (stretched

Made of case hardened steel

* No color options are available at this time

Grom/Z125 Chain and Sprockets Rear Sprocket Size:39 The Superlite RS7 Series rearAll 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