Grom/Z125 Chain and Sprockets Rear Sprocket Size:39 In addition to the colors

In addition to the colors shown

* No color options are available at this time

All existing chains should be checked for wear (stretched

-The chain tension on all modern sport bikes should be maintained with a minimum of 2" of top-to-bottom travel to accommodate full suspension movement and prevent premature chain stretching and sprocket wear

Grom/Z125 Chain and Sprockets Rear Sprocket Size:39 In addition to the colorsAll 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