First build. Max speed 25 mph, Range 60 miles, 28 inch

[Claudioa]

Hello, everyone, I am looking to convert my bicycle into an e-bike, I've made some research and am wondering if I can get some advice from someone with more experience on the field.

My bicycle is a old, 28 inch wheels, kalkhoff, I don’t know the specifics but you can see the pictures attached, I will probably install a disk brake in the front wheel (will be using a rear hubmotor with rim brake on it) and some dropouts in the back to improve safety.
I use it as my primary transport in Lisbon (the 7 hills city). I want to add a pedal assisted hub motor to climb easier, spend less energy and ride faster. I plan also to make longer trips from 50 to 100 km, (or 30 to 60 miles) in 1 charge.

Basically I want an ebike where I can reach and maintain a speed of 40 km/h (25 mph) on flat ground while pedaling, and get a good help when climbing. Once I succeed I will convert my wife’s bicycle too, and she should maintain the same speed.

I see that the prices have a wide range, either for the kits or the parts individually.
I heard good things about the MagicPie3 Hub motor:
https://bmsbattery.com/ebike-kit/429-magicpie3-sine-wave-rear-driving-ebike-hub-motor-ebike-kit.html
But also some bad things about the controller (they even send you an extra one..)
The price seems cheap, and it is easy to install, and I am not sure that it can be used with PAS (Pedal assist).
I see the rated RPM of the motor nowhere, so I don’t know how to calculate my actual top speed, it has 54 poles thought, If I knew the frequency I would get the rpms I guess.

This battery also from bms, seems a good fit for what I am looking for since it has around 1kwh.
https://bmsbattery.com/ebike-battery/161-48v20ah-38120-lifepo4-battery-32-cells-2p16s-ebike-battery-pack-battery.html?search_query=38120+&results=14

Any advice?

Despite being a first timer on ebike attempts, I have big plans, including being able to charge my bicycle with solar panels. On a trip I would pedal a maximum of 4 hours per day and take advantage of the sunny hours to charge the batteries for the next day. I wonder on how the weight increase in cargo will impact my top speed and battery range.

Thanks in advance, Claudio.

 

[Claudioa]

The pics.

 

[contador]

Hi Claudio,welcome to ES.

Living in Portugal,you could start by checking this .

http://www.greentarget.pt/kit_crystalyte.php


Santi.

 

[Claudioa]

I just saw it, seems really nice, the only problem is the price, with a good battery will be over $1500, why so expensive?

 

[contador]

It is the battery what is more expensive.The higher the capacity the higher the price ,but you could ask them for a kit without the battery and save some bucks from shipping rates and taxes.

 

[Rodney64]

Hello, everyone, I am looking to convert my bicycle into an e-bike, I've made some research and am wondering if I can get some advice from someone with more experience on the field.

My bicycle is a old, 28 inch wheels, kalkhoff, I don’t know the specifics but you can see the pictures attached, I will probably install a disk brake in the front wheel (will be using a rear hubmotor with rim brake on it) and some dropouts in the back to improve safety.
I use it as my primary transport in Lisbon (the 7 hills city). I want to add a pedal assisted hub motor to climb easier, spend less energy and ride faster. I plan also to make longer trips from 50 to 100 km, (or 30 to 60 miles) in 1 charge.

This distance you would need a 2 kilowatt pack. Maybe 1.5 with a lot of peddling which is an expensive pack. It maybe possible those distances on a Kilowatt pack, the 48 volt pack you mentioned may achieve it but your max speed would need to be around 25KPH and you would need a controller that's limited to 250 watts.

Basically I want an ebike where I can reach and maintain a speed of 40 km/h (25 mph) on flat ground while pedalling, and get a good help when climbing. Once I succeed I will convert my wife’s bicycle too, and she should maintain the same speed.

I see that the prices have a wide range, either for the kits or the parts individually.
I heard good things about the MagicPie3 Hub motor:
https://bmsbattery.com/ebike-kit/429-magicpie3-sine-wave-rear-driving-ebike-hub-motor-ebike-kit.html
But also some bad things about the controller (they even send you an extra one..)
The price seems cheap, and it is easy to install, and I am not sure that it can be used with PAS (Pedal assist).
I see the rated RPM of the motor nowhere, so I don’t know how to calculate my actual top speed, it has 54 poles thought, If I knew the frequency I would get the rpms I guess.

This battery also from bms, seems a good fit for what I am looking for since it has around 1kwh.
https://bmsbattery.com/ebike-battery/161-48v20ah-38120-lifepo4-battery-32-cells-2p16s-ebike-battery-pack-battery.html?search_query=38120+&results=14

Any advice?

Despite being a first timer on ebike attempts, I have big plans, including being able to charge my bicycle with solar panels. On a trip I would pedal a maximum of 4 hours per day and take advantage of the sunny hours to charge the batteries for the next day. I wonder on how the weight increase in cargo will impact my top speed and battery range.

Thanks in advance, Claudio.

 

[dogman dan]

1500 watt hour pack (1.5 kilowatt hours) will be enough, for a slow speed run that distance. That's about 48v 30 ah, or 36v 40 ah.

No way around the cost of 1.5 kwh of battery. But if you can charge at 30 miles, a 750 wh, 36v 20 ah pack will do.