Eton Viper 90R 4 stroke.
I use 2 5/8 " mylar spacers on our Viper 90R, thus adding over 5" to the width, but then again the 22" mudlite rear tires (which replaced the 18" stock tires) also added to the height. Overall, stability is great and so is the ride.
I also changed to a bigger rear sprocket, in order to get back some of the power that was lost when I went to the bigger rear tires. In any case, there is plenty enough power for my 65 lb. daughter, and I can toot around on it as well.
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