54-Tooth Sur-Ron Sprocket


Current stock: 0

Custom-designed to give more torque to the Sur Ron MX Ebike

54-Tooth sprocket will give you incredible low gearing 

Made in-house in L.A. from Stainless Steel for strength and lighter weight

Mechanically tested in CAD by a mechanical engineer to ensure strength and durability

Includes 420 chain extension with master link for easy extension of your base Sur Ron to handle Luna Cycle's custom 54-Tooth sprocket


 Mechanical strength testing of custom Luna Cycle 60-tooth sprocket in CAD


We designed this sprocket to replace the 42-tooth stock sprocket that comes with our Super Motor conversion kit. It gives you a significant amount more torque and less top speed.  With this sprocket your bike will have a top speed of 28 mph which is within legal limits of most states for an electric scooter  although we still do not recommend or condone riding the Sur Ron on public roads. The 54-tooth sprocket will give you incredible torque and wheeling power way beyond what the stock Sur-Ron has. 

The 54-Tooth sprocket will require changing to a different sized chain unless used with the Luna Sur-Ron Super Moto conversion kit, in which case the stock chain will work.

The Sur-Ron uses a 420 sized chain and you will either need to add links to the existing chain or buy a new 420 chain of the correct length

The Sur-Ron X uses a a 420 O-ring chain and it's not compatible with the supplied extension, you must either replace the chain or add a proper o-ring extension to your o-ring chain.

We will be posting top speed reports soon of this sprocket on both Super Moto bikes and Mx Bikes.


1 Review

RC Jul 11th 2019

Great upgrade

The Luna Cycle 54T sprocket for my Sur Ron X has made a notable difference in performance. It has not transformed the bike into a wheelie machine, as some folks have noted about the 60T version. But there is a good deal more pep and improved climbing ability. I live in a relatively mountainous area and was finding the stock 48T underwhelming on select hills. The 54T seems just right. (Still want more Power! Need ElectricRT battery and controller mod). Who knows, maybe I’ll also get the 60T. It’s such a fun bike and the sprockets change the feel, making it even more fun. I should also note, the sprocket seems well made and durable. Install was fine, but IF you have the Sur Ron X, you will need a new 120 link 420 o-ring chain, cut down to the appropriate size. The links included by Luna only work with the Sur Ron MX (non sealed/no o-ring chain). A chain breaker tool is therefore handy for the install. Thanks Luna!

Add a Review