Mysky

from Boost-bikes ?

Balga: we bought a Oset 20R for our boy, Oset Australia dealer Pete had recommended a Boost-bikes lithium batteries as a backup at that time ,comparing standard SLA battery, this one lasts almost a whole afternoon and still extra miles left, now almost 20months old still same good power delivery, my boy just loves it than anything. Maybe you can check with local dealer in Australia also.

yeah, as gwhy mentioned ,indeed a bigger front sprocket or smaller rear sprocket will actually put more stress on the motor/controller and battery. I had asked similar question for my boy 20R, dealer here had told me same thing, better no change or look help from the dealer which you bought this bike.