Help! RockRider ST100 Conversion KIT HELP Needed!

[saneagle]

If you have freewheel gears, you could try sendin a message to PSWPower and Yose, like this.
"I need ebike kit:

• 27.5" rear wheel
• 250w rear freewheel motor (screw on gears)
• 36v battery
• 36v 15A controller

Please tell me if you can supply and the price.
If not now, when can I get one"

 

[DenisFpsXIV]

That looks OK, apart from the fact that it's a cassette motor. You didn't tell me how many teeth your top gear has, which is important.

let me go back down to my bike and start counting xD

 

[saneagle]

You can still use that cassette motor if you have freewheel gears, but you'd have to buy a 7-speed cassette. A freewheel motor would be better because they're easier to fit, more reliable and normally cheaper.

Shimano Tourney HG200 7s 12-28T/12-32T 8s 12-32T Cassette CS-HG200-7 / CS-HG200-8 For MTB Mountain Bike Bicycle Original Shimano - AliExpress 18

Smarter Shopping, Better Living! Aliexpress.com

vi.aliexpress.com

 

[DenisFpsXIV]

That looks OK, apart from the fact that it's a cassette motor. You didn't tell me how many teeth your top gear has, which is important.

Ok so the front one the bigger one has 42 teeths meanhwile the rear one the biggest has 28 teeth I hope this is right xD, i dont mind if i will have to pedal a little bit more or faster it still gonna be way better that what it is now lol

 

[saneagle]

Ok so the front one the bigger one has 42 teeths meanhwile the rear one the biggest has 28 teeth I hope this is right xD, i dont mind if i will have to pedal a little bit more or faster it still gonna be way better that what it is now lol

Top gear is the smallest cog at the back - the one that's nearest the frame. It'll have 14T,13T,12T or 11T.

 

[DenisFpsXIV]

Top gear is the smallest cog at the back - the one that's nearest the frame. It'll have 14T,13T,12T or 11T.

that one has 14 teeths, had to count 4 times

 

[saneagle]

OK, It's a freewheel. I think the best strategy is to send the message to both Yose and PSWPower to see what they have. In the meantime, watch this so that you understand the difference. It's important so that you can recognise the type of motor being offered. A freewheel motor would be preferable.

 

[DenisFpsXIV]

OK, It's a freewheel. I think the best strategy is to send the message to both Yose and PSWPower to see what they have. In the meantime, watch this so that you understand the difference. It's important so that you can recognise the type of motor being offered. A freewheel motor would be preferable.

thanks a lot for everything, sorry it took this long like i said in the begging im a complete begginer with bikes xD

 

[Peter.Bridge]

they have a 350w freewheel kit with battery

E-Bike Conversion Kit 36V 350W 27.5" Rear Motor Kit for Freewheel with 36V 13Ah Battery and Charger

1. Technical Description1) 36V 350W brushless geared rear freewheel motor, suitable with 6/7/8/9 speed freewheel;2) comes with 27.5" double wall rim and 12G silver spokes, fit for 27.5" bikes;3) 36V 13Ah downtube battery, the range is about 40-50km, comes with 42V 2A charger;4) the max speed of...

yosepower.com

 

[saneagle]

More here:

 

[saneagle]

they have a 350w freewheel kit with battery

E-Bike Conversion Kit 36V 350W 27.5" Rear Motor Kit for Freewheel with 36V 13Ah Battery and Charger

1. Technical Description1) 36V 350W brushless geared rear freewheel motor, suitable with 6/7/8/9 speed freewheel;2) comes with 27.5" double wall rim and 12G silver spokes, fit for 27.5" bikes;3) 36V 13Ah downtube battery, the range is about 40-50km, comes with 42V 2A charger;4) the max speed of...

yosepower.com

350w is not legal in Italy, though!

 

[DenisFpsXIV]

350w is not legal in Italy, though!

nope thats why max i can mount is 250w

 

[saneagle]

nope thats why max i can mount is 250w

Please let us know what response you get from any messages to PSWP or Yose, otherwise all you can do is search through Amazon and Aliexpress for a 250w rear 27.5" freewheel motor kit. If you find one that looks OK, show it so that we can pass comments. One other point is that some of the cheap kits have really bad controllers that have a delay before the power kicks in and they run on for a bit after you stop pedalling. They're better than nothing, but I think it's better to pay more for a better control system.

Another possibility is to build your own wheel, either yourself, a friend or a local bike repairer. You can buy the motor for £70, the controller kit for £50, the battery for £150, the is spokes for £10 and the rim for about £15, which is about £300 or 350 Euros. A repairer would charge about 50 Euros to build the wheel, though most of them aren't setup to deal with motors. You can learn to build a wheel yourself. All you need is a spoke spanner that costs about 10 Euros, a brain that can figure things out and some good instructions, which you can find in Youtube and here:

Wheelbuilding

A tutorial on how to choose parts for, build and true a spoked bicycle wheel

www.sheldonbrown.com

You use an on-line spoke length calculator to get the length of the spokes. I recommend 14g spokes in a 2-cross pattern.

 

[DenisFpsXIV]

Please let us know what response you get from any messages to PSWP or Yose, otherwise all you can do is search through Amazon and Aliexpress for a 250w rear 27.5" freewheel motor kit. If you find one that looks OK, show it so that we can pass comments. One other point is that some of the cheap kits have really bad controllers that have a delay before the power kicks in and they run on for a bit after you stop pedalling. They're better than nothing, but I think it's better to pay more for a better control system.

Another possibility is to build your own wheel, either yourself, a friend or a local bike repairer. You can buy the motor for £70, the controller kit for £50, the battery for £150, the is spokes for £10 and the rim for about £15, which is about £300 or 350 Euros. A repairer would charge about 50 Euros to build the wheel, though most of them aren't setup to deal with motors. You can learn to build a wheel yourself. All you need is a spoke spanner that costs about 10 Euros, a brain that can figure things out and some good instructions, which you can find in Youtube and here:

Wheelbuilding

A tutorial on how to choose parts for, build and true a spoked bicycle wheel

www.sheldonbrown.com

You use an on-line spoke length calculator to get the length of the spokes. I recommend 14g spokes in a 2-cross pattern.

thanks ive found this ones on aliexpress they should be all right with all the informations i have now, chatgbt said everything is compatible and by looking at reviews this have the most and pretty good ones aswell
1st link is the wheel CSC Electric bicycle kit 36V 250w freewheel
2nd link is battery Electric Bicycle Battery Hailong 21700 18650 Cells Pack 36V 13Ah
3rd link also this battery has good sales aswell

CSC Electric bicycle kit 36V 250W 350W 500W Electric bike Conversion Kit 48V 1000W 1500W ebike conversion kit MTX Wheel motor - AliExpress

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Electric Bicycle Battery Hailong 21700 18650 Cells Pack 48V 36V 13Ah 20Ah Powerful ebike Lithium Battery for bafang tsdz2b - AliExpress 18

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36V 48V 52V 13ah 20AH Lithium Yingwu Electric Bike External polly Battery For 250W 500W 750W 1000W Bafang Motor 21700 18650 Cell

Smarter Shopping, Better Living! Aliexpress.com

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will let you know what i get told by pswp or yose i already messaged them

 

[saneagle]

thanks ive found this ones on aliexpress they should be all right with all the informations i have now, chatgbt said everything is compatible and by looking at reviews this have the most and pretty good ones aswell
1st link is the wheel CSC Electric bicycle kit 36V 250w freewheel
2nd link is battery Electric Bicycle Battery Hailong 21700 18650 Cells Pack 36V 13Ah
3rd link also this battery has good sales aswell

CSC Electric bicycle kit 36V 250W 350W 500W Electric bike Conversion Kit 48V 1000W 1500W ebike conversion kit MTX Wheel motor - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

vi.aliexpress.com

Electric Bicycle Battery Hailong 21700 18650 Cells Pack 48V 36V 13Ah 20Ah Powerful ebike Lithium Battery for bafang tsdz2b - AliExpress 18

Smarter Shopping, Better Living! Aliexpress.com

vi.aliexpress.com

36V 48V 52V 13ah 20AH Lithium Yingwu Electric Bike External polly Battery For 250W 500W 750W 1000W Bafang Motor 21700 18650 Cell

Smarter Shopping, Better Living! Aliexpress.com

vi.aliexpress.com

will let you know what i get told by pswp or yose i already messaged them

That kit looks OK. They show KT controllers in the photo list, but they don't give the option to select them. It might be asking them if they can supply the kit with a 15A KT controller and LCD3, which are significantly better than the SW900 one that you can select.

 

[DenisFpsXIV]

That kit looks OK. They show KT controllers in the photo list, but they don't give the option to select them. It might be asking them if they can supply the kit with a 15A KT controller and LCD3, which are significantly better than the SW900 one that you can select.

great to hear that at least this kit and battery are decent since are well inside the budget i will look around to find it with a 15A KT controller and LCD3 after that im pulling the trigger and getting them xD

 

[DenisFpsXIV]

That kit looks OK. They show KT controllers in the photo list, but they don't give the option to select them. It might be asking them if they can supply the kit with a 15A KT controller and LCD3, which are significantly better than the SW900 one that you can select.

asked all the sellers on aliexpress that i could find sadly on europe they cant customize the controllers they come all with the SW900 so i would have to get that separately or just keep the kit ones