I purchased and had installed the Luna Cycle 60t stainless steel sprocket. My desire for more lower end torque over top end prompted me to purchase one of Eric’s units. Went on easy as can be. My only concern is that the included chain extension takes the chain adjusting screws to almost the end of their reach. Not a big deal, but I will probably remove a link to keep the rear axle in the middle of the adjustment range. The added torque down low changes the personality of the Sur Ron more to my personal taste. Exiting a corner and the ability to climb steep hills has always been good, but now it’s great!
Tonight I wanted to see just how much the 60t sprocket reduced my top speed. (like I need ANY excuse to ride!) Luna states that it will max out the top end at 28MPH. Another user stated he obtained a top speed of 32 MPH. Tonight I got 36 MPH measured via a GPS app on flat ground. The hill climbing with the larger sprocket is incredible especially for a bike this small and this light. For what I use my bike for anything over 30 MPH is plenty. My top track speed on my RC51 was 168 MPH so if I want top end I’ll ride that bike! LOL
I’m not sure what the angle degree it is to get up to this spot, but it’s easily over 30 degrees. No question if the Sur Ron would climb this hill, not even a slight hesitation. Remarkable.
I want to dispel a myth that even folks at Luna support. I’m living proof that the 60 tooth sprocket CAN BE USED with the pedal kit. Enough said! LOL
Once I installed the Gen1 USA X controller I decided to remove the 60t sprocket and reinstall the 48t. Why? Because the added torque of the controller made the 60t redundant for what I ride.