This fall, i decide to buy an ebike. It is a Rize City MD. Beautiful bike. I just unbox it yesterday. Run a couple of km. It was -1° cel. I am not planning to use this one in winter. So i can't wait for next spring. Sadly during my ride i've got problem with the derailler. I guess that it was not well adjust and it got entangled in the spokes of the wheel and broke. My bike is unusable. I write this morning to the company for the warranty. I'm waiting.