Cheap Brompton Conversion Kit?

[Leccy]

I'm toying with the idea of getting an electric kit for the Brompton.

Whats the current best option?

Looking for pedelec ideally rather than just throttle.

 

[patpatbut]

Nano or keyde conversion is nearly the best for lightweight setup. Please tell us what is your requirement so we can help a bit more
Pat

 

[shemozzle999]

I'm toying with the idea of getting an electric kit for the Brompton.

Whats the current best option?

Looking for pedelec ideally rather than just throttle.

If your feeling adventurous Leccy you could be the first to try this motor with their torque sensor and lcd display together with a frog battery system:

http://sempumotor.en.alibaba.com/product/1918631484-221832943/36V_250W_front_hub_motor.html

http://sempumotor.en.alibaba.com/product/1919438876-219984346/BB_Torque_Sensor.html

 

[jerrysimon]

If its pedelec you want the Keyde is a nice solution. Just follow my build thread on here. It pretty fast 17mph on the flat in fact almost too fast (you will spin out) for the two speed setup if you want to keep it light.

For thumb throttle only (much simpler) go with a Tongxin.

Specify 28h flanges to keep things simple rim wise.

Jerry.

 

[shemozzle999]

Not a bad price:

Motorlife 2016 Latest 36v 250w 80mm Brompton Ebike Conversion Kit - Buy Brompton Ebike Conversion Kit,Ebike Conversion Kit,80mm Brompton Ebike Conversion Kit Product on Alibaba.com

 

[Swytch Bike]

We have ordered 3 sets of these kits to try out - ETA arrival in April (via sea freight).

Let us know if you're interested - we will be avoiding the cost of air freight so could probably do a competitive price for you compared to buying directly and shipping on a plane.

Not a bad price:

Motorlife 2016 Latest 36v 250w 80mm Brompton Ebike Conversion Kit - Buy Brompton Ebike Conversion Kit,Ebike Conversion Kit,80mm Brompton Ebike Conversion Kit Product on Alibaba.com

 

[Bernard Manansala]

Hi, I'm new to this page.

I got a question about 16" Rims in regards to this conversion kit...

http://www.afterpartz.com/us/36v-electric-bicycle-conversion-kit-front-hub-motor-16.html/

What are the chances that this kit uses a 349 rim?

I did shoot them an e-mail but I'm still waiting for a reply from them.

 

[Deleted member 4366]

zero

 

[patpatbut]

We have ordered 3 sets of these kits to try out - ETA arrival in April (via sea freight).

Let us know if you're interested - we will be avoiding the cost of air freight so could probably do a competitive price for you compared to buying directly and shipping on a plane.

Have you got the kits yet? Interested to see how it fits and performs

Patt

 

[Bernard Manansala]

zero

So my best option with this kit is to source an Brompton Rim and lace the hub myself.

Thank You

 

[shemozzle999]

Hi Bernard,

You would need a rim drilled with 36 spoke holes for the kit you linked to plus a set of spokes manufactured to the right length.

 

[Bernard Manansala]

Hi Bernard,

You would need a rim drilled with 36 spoke holes for the kit you linked to plus a set of spokes manufactured to the right length.

I've built my own wheels before. I've already sourced a rim, just waiting for the kit to arrive so can take measurements for the proper spoke length.

 

[shemozzle999]

Please let us know how you get on with the build.

 

[Deleted member 4366]

So my best option with this kit is to source an Brompton Rim and lace the hub myself.

Thank You

Yes, but you'll have trouble finding spokes the right length. I cut longer ones down and threaded them myself. You can get a 14g threading tool from Ebay. Alternatively, you can probably get them from a specialist spoke maker. Q85 is a good motor for a Brompton. It has just about the right power and plenty of torque for steep hills (only in 16" wheel).

 

[Bernard Manansala]

Yes, but you'll have trouble finding spokes the right length. I cut longer ones down and threaded them myself. You can get a 14g threading tool from Ebay. Alternatively, you can probably get them from a specialist spoke maker. Q85 is a good motor for a Brompton. It has just about the right power and plenty of torque for steep hills (only in 16" wheel).

I can source the proper spokes, just waiting on delivery of the the rim and kit.

 

[shemozzle999]

Cheap spreading tool - do not know if it is safe to use or man enough for the job:

http://en.hollandbikeshop.com/bicycle-tools-maintenance/bicycle-tools/bicycle-tire-tools/fork-spreader/icetoolz-fork-spreader-black/

They sell others too:

http://en.hollandbikeshop.com/bicycle-tools-maintenance/bicycle-tools/bicycle-tire-tools/fork-spreader/

or the new IceToolz E263 Frame and Fork Spreader shown on the Motorlife link available on ebay:

http://www.ebay.co.uk/itm/New-IceToolz-E263-Frame-Fork-Adjuster-Tool-/141469857589?hash=item20f042b735:g:GWUAAOSwMKpUZAo3

 

[Bernard Manansala]

Cheap spreading tool - do not know if it is safe to use or man enough for the job:

http://en.hollandbikeshop.com/bicycle-tools-maintenance/bicycle-tools/bicycle-tire-tools/fork-spreader/icetoolz-fork-spreader-black/

They sell others too:

http://en.hollandbikeshop.com/bicycle-tools-maintenance/bicycle-tools/bicycle-tire-tools/fork-spreader/

or the new IceToolz E263 Frame and Fork Spreader shown on the Motorlife link available on ebay:

http://www.ebay.co.uk/itm/New-IceToolz-E263-Frame-Fork-Adjuster-Tool-/141469857589?hash=item20f042b735:g:GWUAAOSwMKpUZAo3

Going to use the threaded rod method and use vice grips to bend the drops parallel. Which brings up another question, can I get by without bending the drops parallel to each other?

 

[Bernard Manansala]

Just got tracking info on my kit, should be coming in this Friday. Rim probably next week. Battery is going to take a while.

 

[anotherkiwi]

Yes, but you'll have trouble finding spokes the right length. I cut longer ones down and threaded them myself. You can get a 14g threading tool from Ebay. Alternatively, you can probably get them from a specialist spoke maker. Q85 is a good motor for a Brompton. It has just about the right power and plenty of torque for steep hills (only in 16" wheel).

Do you ever have any problems with your threads bing cut and not rolled? The strength issue has been putting me off threading my own spokes.

 

[shemozzle999]

Going to use the threaded rod method and use vice grips to bend the drops parallel. Which brings up another question, can I get by without bending the drops parallel to each other?

The drop outs on the Brompton are quite thin and the anti rotation washer tabs are positioned at the very end of the drop outs and have to be filed down to the same thickness as the drop out to ensure the hub nut sits flush when clamped up.

If you don't bend them parallel it could be difficult to get the tab to hold in the correct position while clamping.

You may also need an extra spacer washer each side to ensure the motor body clears the inside face of the forks.