This is my first eBike build so its not going to be power monster.
I have an old 2005 Jamis Dakar XLT 1.0 that I used to ride offroad with. The Jamis is super comfortable to ride on the road as it has very plush suspension. Its basically a burly XC bike with 5" of travel front and back. http://www.bikepedia.com/quickbike/BikeSpecs.aspx?year=2005&brand=Jamis&model=Dakar+XLT+1.0
The idea was to convert it into a commuter bike. I live in a very hilly area. The commute home involves one long nasty climb of about 20% grade. Most of the commute into the city is along dedicated bike paths and is about 25km return. This means I wasn't after top speeds, but decent torque to go up hills. Along the route there are a few light XC trails that would be fun to fang through. No big jumps or anything just some easy single trail. I don't need huge range. I decided a top speed of at least 50kph and a cruising speed around 30~40kph would be nice.
I like the idea of having a well balanced eBike that still feels like a bike. The goal was to keep the weight low down and central inside the frame.
Being a daily commuter I wanted a no fuss battery system, so I ruled out using LiPO's and went with LiFePO's instead. (Plus I think LiPO's on my first build is not a great idea.)
I worked out what sort of battery configuration I could fit in the frame. The usual suspects didn't quite work out in the frame due to the rear suspension linkage.
I ended up getting a custom battery made to fit. It uses 10Ahr LiFePO4 pouch cells in a 20s configuration for 64v and 70ish off the charger. The cells can handle 3C continuous and 5C peak, so the battery can handle 30A continuous.
View attachment 1
I wanted to find a suitable hub motor that would suit 30A @ 64v and provide good torque. The MAC 10T seemed to fit the bill. In particular the upgraded MAC 10T from cellman. (Upgrade stator, wiring, temp sensor, etc.) The geared motor suits the torque requirement, as well as being fairly light and inconspicuous. The ability to freewheel also had great appeal. From a bit of math the MAC 10T should do about 50~55kph with 64v in a 26" wheel.
A smallish controller able to put out 30A continuous and support 64v was also in order, as well as a few chargers, a CA3, and quite a few spares.
I decided that most of this could be ordered from cellman as well to save quite a bit on shipping.
I have an old 2005 Jamis Dakar XLT 1.0 that I used to ride offroad with. The Jamis is super comfortable to ride on the road as it has very plush suspension. Its basically a burly XC bike with 5" of travel front and back. http://www.bikepedia.com/quickbike/BikeSpecs.aspx?year=2005&brand=Jamis&model=Dakar+XLT+1.0
The idea was to convert it into a commuter bike. I live in a very hilly area. The commute home involves one long nasty climb of about 20% grade. Most of the commute into the city is along dedicated bike paths and is about 25km return. This means I wasn't after top speeds, but decent torque to go up hills. Along the route there are a few light XC trails that would be fun to fang through. No big jumps or anything just some easy single trail. I don't need huge range. I decided a top speed of at least 50kph and a cruising speed around 30~40kph would be nice.
I like the idea of having a well balanced eBike that still feels like a bike. The goal was to keep the weight low down and central inside the frame.
Being a daily commuter I wanted a no fuss battery system, so I ruled out using LiPO's and went with LiFePO's instead. (Plus I think LiPO's on my first build is not a great idea.)
I worked out what sort of battery configuration I could fit in the frame. The usual suspects didn't quite work out in the frame due to the rear suspension linkage.
I ended up getting a custom battery made to fit. It uses 10Ahr LiFePO4 pouch cells in a 20s configuration for 64v and 70ish off the charger. The cells can handle 3C continuous and 5C peak, so the battery can handle 30A continuous.
View attachment 1
I wanted to find a suitable hub motor that would suit 30A @ 64v and provide good torque. The MAC 10T seemed to fit the bill. In particular the upgraded MAC 10T from cellman. (Upgrade stator, wiring, temp sensor, etc.) The geared motor suits the torque requirement, as well as being fairly light and inconspicuous. The ability to freewheel also had great appeal. From a bit of math the MAC 10T should do about 50~55kph with 64v in a 26" wheel.
A smallish controller able to put out 30A continuous and support 64v was also in order, as well as a few chargers, a CA3, and quite a few spares.
I decided that most of this could be ordered from cellman as well to save quite a bit on shipping.