Think about buying a Yose power need help guys

[Michael 2025]

Right am thinking about buying a Yose power 350w 36v rear hub kit ( cassette)
Looking to install it on 20inch frame carrea hellcat ltd edition 29 inch wheels,
the carrea a have has 8 speed cassette


1 few questions Yose power 350 w only have 28 inch kits will this be compatible with my 29 inch tyres .

2 will a be able to install 10 speed cassette on Yose power kit ?

what’s the batterie life and speed on these kits
It’s to go to work & back 10 mile each way
Looking to hit speed 22 mph and few hills but mainly flat ?

Am about 15 stone

thanks guys

 

[saneagle]

Right am thinking about buying a Yose power 350w 36v rear hub kit ( cassette)
Looking to install it on 20inch frame carrea hellcat ltd edition 29 inch wheels,
the carrea a have has 8 speed cassette


1 few questions Yose power 350 w only have 28 inch kits will this be compatible with my 29 inch tyres .

2 will a be able to install 10 speed cassette on Yose power kit ?

what’s the batterie life and speed on these kits
It’s to go to work & back 10 mile each way
Looking to hit speed 22 mph and few hills but mainly flat ?

Am about 15 stone

thanks guys

Where do you live? The 350w one is illegal in UK, and so is 22 mph unfortunately. The 250w one would be better in a large wheel. The 350w one might feel a bit gutless and won't climb as well.

There's some good info here:

Yosepower Rear Hub Motor Comparison Test

I've now converted three bikes using Yosepower rear hub motors and been able to make some comparisons. They are:- AKM95RX RC 250w. cassette 700c. wheel. Yosepower claim 25Km/h top speed (with a speed-limited 15A controller) and 58Nm torque. AKM95RX RC 350w. cassette 26" wheel. Yosepower claim...

www.pedelecs.co.uk

 

[Michael 2025]

Where do you live? The 350w one is illegal in UK, and so is 22 mph unfortunately. The 250w one would be better in a large wheel. The 350w one might feel a bit gutless and won't climb as well.

Uk. , a don’t mind been little bit over the legal limit it’s not to go crazy on it’s just get work and back will be installing 36 v 13/or 14 amp battery and the 10 speed cassette to hide the rear motor bit ,

 

[saneagle]

Uk. , a don’t mind been little bit over the legal limit it’s not to go crazy on it’s just get work and back will be installing 36 v 13/or 14 amp battery and the 10 speed cassette to hide the rear motor bit ,

You don't really need 10 speed when you have a motor. It won't hide anything. the police simply look for the markings on the motor, and if it doesn't have any, you'd need to provide receipts. Does your bike already have 10-speed? If not, I wouldn't bother.

Can you actually pedal comfortably at 22 mph when going downhill? Your bike has pretty low gearing with the standard 34T chainring and 12T top gear.

Five or ten years ago, nobody cared about speed limits, but it's getting very dodgy now. Only you know what sort of risks you want to take.

 

[Michael 2025]

Where do you live? The 350w one is illegal in UK, and so is 22 mph unfortunately. The 250w one would be better in a large wheel. The 350w one might feel a bit gutless and won't climb as well.

There's some good info here:

Yosepower Rear Hub Motor Comparison Test

I've now converted three bikes using Yosepower rear hub motors and been able to make some comparisons. They are:- AKM95RX RC 250w. cassette 700c. wheel. Yosepower claim 25Km/h top speed (with a speed-limited 15A controller) and 58Nm torque. AKM95RX RC 350w. cassette 26" wheel. Yosepower claim...

www.pedelecs.co.uk

Very interesting read that , and no me bikes got 8 speed , so 250 w with separate control would be more beneficial for me , would that take to 20mph ?

 

[Cadence]

Very interesting read that , and no me bikes got 8 speed , so 250 w with separate control would be more beneficial for me , would that take to 20mph ?

Since I posted that comparison I am pleased to say all three are still going strong without any major problems, although I've upgraded two of them (28" 250w. cassette and 26" 350w. freewheel) with KT controllers.
"Out of the box" the Yose 250w rear cassette is completely legal and a slightly better hill climber. You won't be able to set the top speed higher than the legal 15.5mph unless you replace the controller - although you can with the standard 350w. kits. The 250w. won't go much above 18mph anyway due to the motor gearing.
I have found that as I've used them more I don't feel the need to go above 15.5mph - my local pot holed roads are not very safe or comfortable at any higher speeds and I just wear the brakes out more.
I can easily pedal manually downhill above the cut-out limit into the mid-20's if I want (48T front - 11T rear gears) but it is just an occasional "thrill"!

 

[saneagle]

Very interesting read that , and no me bikes got 8 speed , so 250 w with separate control would be more beneficial for me , would that take to 20mph ?

Here's some ideas that might help you.

• Any 36v motor will go 30% faster when you run it with a 48v battery and controller.
• Any motor marked 250w is legal, regardless of what you do with it, though your bike would be illegal if it can go with power above 15.5 mph (+10%) without pedalling or if you can get power without pedalling above 4 mph.
• If you want to pedal at 20 mph, you need suitable gearing. That would typically be a chainwheel of around 48T with an 11T top gear for a 26" wheel or 42T chainwheel for a 29" one - maybe 38T if you like pedalling fast. Your top gear is 12T, so I'd think about getting another cassette as part of your conversion. 8-speed are really cheap.
• The Yose controllers are not very good. A KT one at about £70 is a lot better and you get access to all settings.
• Different motors have different speeds (RPM). Most 250w ones are around 250 rpm, which would give good power up to 15 mph in a 29" wheel. From there the power would ramp down to zero at around 21 mph. You need to check the exact max rpm in any listings, but they often don't give this important characteristic.
• 29" wheels are not the best for typical hub-motors because the wheel turns slower, which reduces efficiency, and you get worse hill-climbing because of the lower leverage.
• The Yose 250w motor is wound for low speed, so gives good efficiency and better climbing than a faster one.
• There's never an exact answer to what you want. If you want a ready made kit, you have to find the one that's the best fit to your requirements, otherwise, you can make your own kit with mix-and-match parts from Chinese resellers, Amazon or Ebay.

 

[Baz the balloon man]

I had a 350W YOSE AKM motor I think it was but it had Bafang 250w stickers on it along with CE markings ECT.

I really liked it on a classic light weight Giant and the AKM is good value for money .

I found I did not use the gears much and turned off the power going down hill so used a small battery as the bike was also easy to ride as a bike with no power.

I could do 25MPH with no power on the down hill and flat using the pedals.

As to fitting of 29 inch wheels not sure but if you look on the classified ads on here I have some Bafang Rear hub motors for sale Free wheel I think you may be able to get a 10 speed freewheel but again I am not sure on this .

Just get one of these fitted into your 29 inch rim by a professional wheel wright .

I think some of the older 250W motors can do more speed with the right controller KT kit would work well for you and you can password protect when on the road and get that little bit more speed you are looking for with minimal risk if that’s what you intend to do.

 

[Baz the balloon man]

Not sure about the new ish Suntours 250W motor but the pre 2022 ones will definitely give more speed when hooked up with China components but they are expensive new or used compared to AKM ECT

 

[Michael 2025]

Here's some ideas that might help you.

• Any 36v motor will go 30% faster when you run it with a 48v battery and controller.
• Any motor marked 250w is legal, regardless of what you do with it, though your bike would be illegal if it can go with power above 15.5 mph (+10%) without pedalling or if you can get power without pedalling above 4 mph.
• If you want to pedal at 20 mph, you need suitable gearing. That would typically be a chainwheel of around 48T with an 11T top gear for a 26" wheel or 42T chainwheel for a 29" one - maybe 38T if you like pedalling fast. Your top gear is 12T, so I'd think about getting another cassette as part of your conversion. 8-speed are really cheap.
• The Yose controllers are not very good. A KT one at about £70 is a lot better and you get access to all settings.
• Different motors have different speeds (RPM). Most 250w ones are around 250 rpm, which would give good power up to 15 mph in a 29" wheel. From there the power would ramp down to zero at around 21 mph. You need to check the exact max rpm in any listings, but they often don't give this important characteristic.
• 29" wheels are not the best for typical hub-motors because the wheel turns slower, which reduces efficiency, and you get worse hill-climbing because of the lower leverage.
• The Yose 250w motor is wound for low speed, so gives good efficiency and better climbing than a faster one.
• There's never an exact answer to what you want. If you want a ready made kit, you have to find the one that's the best fit to your requirements, otherwise, you can make your own kit with mix-and-match parts from Chinese resellers, Amazon or Ebay.

Sorry for the late reply , was on night shift last night

there some good idea there a think will hold off buying at the moment have good think about it
instead just jump in going for 350w

What do you think about 250 w paired up with KT Controller 20amp and either 36v 0r 48v am looking at that idea , money not really option as long as a can get something to get there back from work with minimal effort just peddling with minimal risk , a travel back early hours the morning so not going go stupid. Or draw attention to my self . Like them big 2k watts hub what the police are after .

 

[Michael 2025]

I had a 350W YOSE AKM motor I think it was but it had Bafang 250w stickers on it along with CE markings ECT.

I really liked it on a classic light weight Giant and the AKM is good value for money .

I found I did not use the gears much and turned off the power going down hill so used a small battery as the bike was also easy to ride as a bike with no power.

I could do 25MPH with no power on the down hill and flat using the pedals.

As to fitting of 29 inch wheels not sure but if you look on the classified ads on here I have some Bafang Rear hub motors for sale Free wheel I think you may be able to get a 10 speed freewheel but again I am not sure on this .

Just get one of these fitted into your 29 inch rim by a professional wheel wright .

I think some of the older 250W motors can do more speed with the right controller KT kit would work well for you and you can password protect when on the road and get that little bit more speed you are looking for with minimal risk if that’s what you intend to do.

This what am more after light peddling 22 mph and get up few medium hills

 

[Michael 2025]

So this controller paired with a 250w or 350 w better that the Yose power controller ??

 

[Wayners]

Reading up I think the Kt 15amp controller works with the 250w motors.
Any harm in getting a 20amp controller?

Edit
Found this.

Max amps

Hi good morning people just need a answer on my sw900 display Says P14 The Current-limiting of Controller. The original Current is 12A. Range:1-20A Please check the current your controller and the hub motor can handle. Set the limit accordingly. Does this mean I can only get 20amps from the...

www.pedelecs.co.uk

To answer. Maybe. Maybe not.
Think I'll stick to 15amps.
I'll be running at 48v so I think Ill be better off.

 

[Baz the balloon man]

Buy a really good top end road bike light and easy to ride .
Put a fully road legal kit on it and only use the e power when you need it ie going up hill on your way home from work for instance.

Spezalised , Giant, ECT then modify the bike to suit your needs needs suspension or bigger tyres to suit your road conditions best way to go faster than 15MPH if that’s what you want to do .

Cheaper than buying a 3K Carbon e bike for instance .

 

[Baz the balloon man]

Reading up I think the Kt 15amp controller works with the 250w motors.
Any harm in getting a 20amp controller?

Edit
Found this.

Max amps

Hi good morning people just need a answer on my sw900 display Says P14 The Current-limiting of Controller. The original Current is 12A. Range:1-20A Please check the current your controller and the hub motor can handle. Set the limit accordingly. Does this mean I can only get 20amps from the...

www.pedelecs.co.uk

To answer. Maybe. Maybe not.
Think I'll stick to 15amps.
I'll be running at 48v so I think I be better off.

I think 17amp would do for 250W that said my 15amp KT works well with 250 W motors on the bench all different brands .

 

[Wayners]

@Michael 2025

eBay. Item 256369636190

Here

That's what I've ordered

I'm winging it with some advice from here so I am no expert

 

[saneagle]

The average 250w medium sized geared hub-motor can manage about 22A at 36v and 17A at 48v. If you go higher than that, there's a good chance you'll strip the gears.

How much power you need depends on your weight and how steep the hills are.

 

[Nealh]

From experience I prefer the 22a S09S over the S06S , but that is down to my use and my slowish cadence .
Downside is the 9fets are in a larger size box.

 

[Michael 2025]

The average 250w medium sized geared hub-motor can manage about 22A at 36v and 17A at 48v. If you go higher than that, there's a good chance you'll strip the gears.

How much power you need depends on your weight and how steep the hills are.

Weight is 15 half stone
Hill grade about 5% to 10 % no heigh than that
10 miles there and back to work

 

[Wayners]

I was also considering the battery required for a 17amp controller vs 15amp.