Why can they not directly connect the drive shaft to the engine? Electric motor powered cars do not have transmissions why?
01. in an internal combustion engine, we cannot control the minimum speed (rpm) as a electri motor. becouse it stops. 02. a vehicles with an internal combustion engines are heavy and tough. we dont have enough torque in the engine to give a starting move. but we have more rpm. so we convert the excessive rpm to more torque (Nm) with the transmission. the most torque is required during the begining of moving. so we use higher gear ratio (1st,2nd) which gives big torque and low r.p.m. as the vehicle starts moving, it takes lesser power from the engine side to increase its speed. so we shift to 3rd 4th like that when u drive in top gear, the gear ratio in ur transmission is 1:1. some cars have a further drive call OD (over drive) gear which gives very high r.p.m with very little amount of Newton meters. But if u want to build a electric heavy vehicle, of couse u need a transmission.
Get your car aligned first to see WHY the rears are wearing out faster, ALSO rotate your tires regularly, every 5000 miles is a good rule of thumb.
The same reason bicycles need more than 1 gear. A bike with many gears is faster than a bike with only one gear. I don't about all electric cars, but many of them do have transmissions.
Electric motors can start from zero RPM. Engines cannot. Engines also only make sufficient power at a certain range of RPM, typically from 1500 to 3500 RPM (for normal everyday drivers). About the slowest a gas or diesel engine can run around 600 RPM. Going lower than that will cause it to stall.
Stop smokin' those tires! If you don't accelate heavily, see your mechanic for the reason that they are wearing so quickly. Tires wear in different patterns. This indicates the problem. They also need to be kept inflated properly, which means adjusting when the weather temperature changes. Perhaps a wider tire would help. Or a different brand or style. It's not one size fits all.
