I've converted two mtb now, one for me and one for the other half. I must be misunderstanding something because they perform in a way I wouldn't expect from what I've been trying to learn on here.
Hers is a ebc kit fitted to a gt mtb. Their info says it is a 36v low rpm motor:
IMG_20170516_173045494 by alex sally, on Flickr
It is very smooth. It has that electric "whirr" noise to it , even after a couple of hundred miles'. the tech spec says
Technology – Brushless Geared Motor
RPM – 100 – 235
Max Torque – 15N.m
With the lower rpm I would expect it to be better on hills but....
My bike, not that it matters which we ride, is similar with a 36v hub like this.http://www.ebay.co.uk/itm/Retrofit-Kit-36V350W-26-Rear-Motor-Cassette-E-Bike-Hub-Conversion-LCD-Display/302237557385?_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=47048&meid=c43a889177df4451a5515f56eff14ec1&pid=100678&rk=3&rkt=9&mehot=lo&sd=132319907149&_trksid=p2481888.c100678.m3607&_trkparms=pageci%3A6b241f90-9549-11e7-a412-74dbd1806b18%7Cparentrq%3A662da8f915e0ab1caccf3987ffff10f1%7Ciid%3A1
On paper it looks the same but it's marked/ sold as 350w (which I understand is just marketing)
my bike looks like this:
IMG_20170613_183405 by alex sally, on Flickr
My other half thinks this one is quite a bit better. Both bikes deal with a hill upto 20% but mine is quieter (almost silent tbh). more torque and more assisted. I can go most places on 1-3 and only 5 for the 20% bits.
They both use the same rated controller and both do about 25mph with the wheel in the air. Mine is a cassette fitting which I doubt makes much difference.
So, I emailed ysbattery because at £199 I was going to order another hub and swap hers out...In the email I asked what rpm the motor was , expecting them to say "201rpm" which I gathered might be what gave the extra torque. they emailed back and said
"the kits are all 300-320rpm"
I gathered that that high rpm would be lower torque but it feels higher??? 15a controller and 36v. mmm
I'm tempted not to worry about the science (although its bugging me) . my only obstacle is fitting the cassette hub in her bike which has and had a freewheel but I guess I can get a cassette easy enough.
So is the 350w hub really more torque than the 250w?
BTW anyone reading this who has never converted or ridden an ebike. This is a side by side comparison. Both are great. Either will do a 10 mile mountain trek around mid wales without problem. The ysbattery kit or elfieshop kit are better connectors etc but both are very good value. If i was doing it again I would probably have gone crank because I see woosh have bbs02 at £399...where torque etc would not be an issue I doubt.
Alex
Hers is a ebc kit fitted to a gt mtb. Their info says it is a 36v low rpm motor:
IMG_20170516_173045494 by alex sally, on FlickrIt is very smooth. It has that electric "whirr" noise to it , even after a couple of hundred miles'. the tech spec says
Technology – Brushless Geared Motor
RPM – 100 – 235
Max Torque – 15N.m
With the lower rpm I would expect it to be better on hills but....
My bike, not that it matters which we ride, is similar with a 36v hub like this.http://www.ebay.co.uk/itm/Retrofit-Kit-36V350W-26-Rear-Motor-Cassette-E-Bike-Hub-Conversion-LCD-Display/302237557385?_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=47048&meid=c43a889177df4451a5515f56eff14ec1&pid=100678&rk=3&rkt=9&mehot=lo&sd=132319907149&_trksid=p2481888.c100678.m3607&_trkparms=pageci%3A6b241f90-9549-11e7-a412-74dbd1806b18%7Cparentrq%3A662da8f915e0ab1caccf3987ffff10f1%7Ciid%3A1
On paper it looks the same but it's marked/ sold as 350w (which I understand is just marketing)
my bike looks like this:
IMG_20170613_183405 by alex sally, on FlickrMy other half thinks this one is quite a bit better. Both bikes deal with a hill upto 20% but mine is quieter (almost silent tbh). more torque and more assisted. I can go most places on 1-3 and only 5 for the 20% bits.
They both use the same rated controller and both do about 25mph with the wheel in the air. Mine is a cassette fitting which I doubt makes much difference.
So, I emailed ysbattery because at £199 I was going to order another hub and swap hers out...In the email I asked what rpm the motor was , expecting them to say "201rpm" which I gathered might be what gave the extra torque. they emailed back and said
"the kits are all 300-320rpm"
I gathered that that high rpm would be lower torque but it feels higher??? 15a controller and 36v. mmm
I'm tempted not to worry about the science (although its bugging me) . my only obstacle is fitting the cassette hub in her bike which has and had a freewheel but I guess I can get a cassette easy enough.
So is the 350w hub really more torque than the 250w?
BTW anyone reading this who has never converted or ridden an ebike. This is a side by side comparison. Both are great. Either will do a 10 mile mountain trek around mid wales without problem. The ysbattery kit or elfieshop kit are better connectors etc but both are very good value. If i was doing it again I would probably have gone crank because I see woosh have bbs02 at £399...where torque etc would not be an issue I doubt.
Alex
