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PMP Honda Grom Rear Sprocket 420

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Product Name Qty
Honda Grom Rear Sprocket 420-Blue-36T 1
PMP Honda Grom Rear Sprocket 420-32T-Black 1

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Aluminum rear sprocket for the Honda Grom 125

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You've just put money down on a new Honda Grom or financed it and you may be unwilling to spend money right away to upgrade it. Changing your sprockets might be an ideal early mod for you. Available at DROWsports are the 34t, 35t, 36t, and 37t rear sprockets. This low cost and easy to do mod can improve your acceleration and/or top speed right away depending on your settings. Your stock Honda Grom comes with the 34t rear sprocket, by changing to the 35t or 36t it will increase your top end speed on a stock grom. For guys with modded Groms, changing both your front and rear sprockets, you can find the combination that gives you the gear ratio that works best for you. Lowering your ratio will provide increased top end, while increasing the gear ratio will increase acceleration at the bottom-end. In other words, a high ratio will cause higher RPMs and quicker gear shifts but sacrifice top end speed. With a lower ratio, you'll experience lower RPMs as you increase in speed at a slower rate, however you'll optimize the maximum speed potential between each gear. Changing both front and rear sprockets will allow you to tune it to perform to your needs.

In addition to the various sizes, they are offered in different colors to make identifying multiple sprockets easier. Pick up a few, as mentioned earlier, this is one of the easiest and most cost effective mods you could do early on, and in just a few minutes with some basic tools, you can have your stock sprockets replaced with higher performance sprocket!

Additional Info

Additional Info

Specifications Applications:
Honda Grom
Honda MSX125
Factory Configuration: 15t Front & 34t Rear (2.27)


Gear Ratio Table:
13 14 15 16
33 2.54 2.36 2.20 2.06*
34 2.62 2.43 2.27 2.13
35 2.69* 2.50 2.33 2.19*
36 2.77* 2.57 2.40 2.25
37 2.85* 2.64* 2.47 2.31*

*Inadvisable configuration
Brand PMP Sprockets


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