Making my cargotrike a climber...

[Hiver]

Hi all, newbie here. I have a Christiania trike, but a special version with gear deraillor(spelling?)/7 speed casette. (See photo)

This is to be a summer house bike, for me to bike with my two daughters (so a heavy load altogether) and there is a mean hill going to and from the house. So I need to make this bike a climber with lots of torque, so will probably need to exceed the 250 watts limit. (EU-Denmark based)

Question: What solution will you recommend? I am tempted by the hub based BPM-CST 500 W, nicknamed 'the climber'...but unsure if a center based engine is a better bet? (But looking at the frame I understand most advice against this due to lack of clearance)

Thanks, Mads

 

[soundwave]

5000w bit expensive tho

http://www.hi-powercycles.com/hpc-striker-mountain-climber-complete-kit/

 

[Nealh]

For torque over speed go for a 201rpm motor which will still manage 25km/h.
The Bafang bpm/cst is about 4.3kg and 180mm dia alternatively a Q128c 500w comes in at about 3kg and is only 120 mm dia and highly rated.
A crank drive/center drive (BBS) would hang a little low but should have enough clearance otherwise (if dimensions are known) you may be able to fit BBS in the triangle area. A BBS would be the easier build if it was to fit, where was you thinking of putting the battery ? 3 options; A: In the carrier, B: On a rear rack or C: Bolted to the back of the carrier's rear bulkhead.

 

[Hiver]

5000w bit expensive tho

http://www.hi-powercycles.com/hpc-striker-mountain-climber-complete-kit/

My goodness, probably would be terrified to get on the thing even if I could afford it

 

[Hiver]

For torque over speed go for a 201rpm motor which will still manage 25km/h.
The Bafang bpm/cst is about 4.3kg and 180mm dia alternatively a Q128c 500w comes in at about 3kg and is only 120 mm dia and highly rated.
A crank drive/center drive (BBS) would hang a little low but should have enough clearance otherwise (if dimensions are known) you may be able to fit BBS in the triangle area. A BBS would be the easier build if it was to fit, where was you thinking of putting the battery ? 3 options; A: In the carrier, B: On a rear rack or C: Bolted to the back of the carrier's rear bulkhead.

Interesting, will look into the q128c, and BBS. Battery should probably be outside carrier, so leaning towards C.

Thanks!

 

[Cyclezee]

Hi Mads,

If you are anywhere near Copenhagen check out Thunderfist, they are dealers for eZee conversion kits which would be ideal for your Christiania trike.
http://thunderfist.dk/produkt/ezeebike-electric-bike-kit/

 

[Kinninvie]

It may be possible to fit a BBS02 with the motor above the bottom tube.
Here is the diagram with the dimensions.
Measure your frame and see.