Ebike rider
1 mW
Hello . I want to install a motor 1000w , 48v to a bicycle , and it will be connected to the gears on the rear wheel.. so is the motor of 3500rpm ( 1000w , 48v , 2.7N.m ) is suitable ? Thanks
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Yes sir. . Sorry I was a little busy ..Your 26" wheel only spins at 160 rpm to go 12 km/hour. While you said your motor is 3500 rpm, is it like the MY1018 which has reduction gears to slow that down to about 400-500 rpm? Otherwise, you cannot do it.
Thanks for you first .You want to match the motor kv with the battery to match your speed requirements, whats your wheel size, or you going for a hub motor acting as a mid drive?
Without knowing the grade of the hills, total weight of the bike and rider, wheel diameter, or other details, there's no way to tell. My guess is you'll need a 150 to 200 tooth rear if the motor is only capable of 2.7Nm, but your idea of steep may be different from mine.Thanks for you first .
I want to put it near the pedal and by chain connect it to the rear gear .
My question just about that the motor is a low torque motor and high rpm and 11 teeth .
so could the rear gear of 36 teeth be enough to increase the torque and let the bike climb hard streets? No matter about speed I seek a high torque not a high speed .
Thanks for you and for every one may gives a consultation.
Yea yea you are right , but I did not think about that .. I want to realize that the new torque will serve me in what I want ..You do realize that 165T is about the same diameter as a 26" rim, if the chain link length is same as a standard bicycle chain (1/2"), I saw a post on this website where someone actually put gear teeth around the rim of his rear wheel to do this. Or it might have been a belt/pulley.
Thanks brother. I think you are right. Let us say 165t. While the motor has 11t. (165/11= 15 ) , ( 3100rpm / 15=206 rpm).
That means reduce the rpm from 3100 to 206 which means incraes the torque from 2.7 to 46N.m.
Do you think 46N.m could help climbing slops ?? ( I think bike and rider are 120kg .
Do you agree ? Or it may be weak , or I need a motor of high torque and less rpm ( ratio ) .
Torque to a small wheel gives more thrust than equal torque on a larger wheel. OP stipulated that he has 20 inch wheels.I think 46 Newtons/meter is a little light. Don't quote me on it -- I mean I'm not positive -- but I think 60nm is more or less the minimum if you want to be able to handle the steepest inclines.
It is clear ..thanks alot brotherI think 46 Newtons/meter is a little light. Don't quote me on it -- I mean I'm not positive -- but I think 60nm is more or less the minimum if you want to be able to handle the steepest inclines.
Sure. Its 20 inch .. sure if it were more than 20 , it would need larger torque. Thanks alot sirTorque to a small wheel gives more thrust than equal torque on a larger wheel. OP stipulated that he has 20 inch wheels.
Wait, so why isn't 20" the standard for brand bikes?Torque to a small wheel gives more thrust than equal torque on a larger wheel. OP stipulated that he has 20 inch wheels.
Because 20" wheels have other limitations and compromises. They have reduced ride quality and traction, increased rolling resistance, limited ability to surmount obstacles, and their momma dresses them funny.Wait, so why isn't 20" the standard for brand bikes?
Hello sir. So also why isn't 10 , 5 the stander ?!!Wait, so why isn't 20" the standard for brand bikes?
Don't you sir see that 26 or 29 wheel needs more effort for riding : for ebike or normal bycycle ! And needs more torque for climbing slops ! Because it is faster depending on its longer diameter ....Because 20" wheels have other limitations and compromises. They have reduced ride quality and traction, increased rolling resistance, limited ability to surmount obstacles, and their momma dresses them funny.
CPSC compliant e-bikes have no problem hitting their power and speed limits without resorting to small diameter wheels. However, many of the most popular turn-key e-bikes use 20x4" fat tires. Those make the hub motor work better while making the bike much worse (but the intended buyers don't know any better).
Don't you sir see that 26 or 29 wheel needs more effort for riding : for ebike or normal bycycle !
And needs more torque for climbing slops !
Thanks anywhere brother.If you think that, you haven't ridden both kinds. Bigger is always easier (with like tires).
I said so myself. That's easily correctable with gearing on a pedal bike or mid drive, but not a hub motor.
How easy it is to put feet down is a function of bottom bracket height and seat angle, not wheel size.
Thanks for youput the feet down is the key function, dont care about leg angle, pedal height, only watts and volts, the more the better.
The motor (or your legs) only provide a fixed amount of power. The key is to match the wheel speed to the speed that amount of power can provide, in the conditions you want to ride. That's why gearing-- or changing the effective gearing by changing the wheel size-- matters so much.Thanks anywhere brother.
Notice that one pedaling means longer distance when the wheel is bigger .. which means more power !
If you think that, you haven't ridden both kinds. Bigger is always easier (with like tires).
Alright, I like to think of myself as a relatively smart cookie, but I have to admit that this isn't making any sense to me (and very little bothers me more than not understanding things, for better or worse). Maybe if I just ramble for a paragraph, somebody will be able to notice what I'm not getting and point it out or something.The motor (or your legs) only provide a fixed amount of power. The key is to match the wheel speed to the speed that amount of power can provide, in the conditions you want to ride. That's why gearing-- or changing the effective gearing by changing the wheel size-- matters so much.