Motorized Streetmachine

[Holli]

Hi,

I would like to motorize my Streetmachine GT recumbent bike.
In the short list are Tongxin or Bafang at my 20” front wheel
Now my problem:
My (spring-loaded) wheel fork allows an inner width of 100mm (close to axes) but narrows after only 30mm (from centre) to 80mm (due to springs).
The dimensional sheet of Tongxin states a width around the axis of 105mm, which narrows to 101mm.
For Bafang, I have no dimensions.
The nuts of both of the motors seem to be M12. My fork has a 10mm slot.
I could get a (inelastic) fork with a 100mm width (with 10mm slots)
Does anybody know if this might fit?
Is it possible to expand a fork a “bit”?
Or –better- has anybody done the same retrofitting recently...
Thanks for your help

Greets Holger

 

[Brad]

How about a rear hub motor? or
Brad Hori's 2007 HP Velotechnik SpeedMachine

 

[seeker]

How about a rear hub motor? or
Brad Hori's 2007 HP Velotechnik SpeedMachine

Hi Brad,

I'm suprised flecc hasn't built himself one of these from scratch.

Though if anything's going to get a coppers attention, whizzing by at 40+ on your back on one of these is sure. I bet 'Mussels' is itching to chuck one down one of his hills

regards

seeker

 

[Mussels]

Hi Brad,

I'm suprised flecc hasn't built himself one of these from scratch.

Though if anything's going to get a coppers attention, whizzing by at 40+ on your back on one of these is sure. I bet 'Mussels' is itching to chuck one down one of his hills

regards

seeker

I'd love a go but not on a public road, that little front wheel looks decidedly twitchy.