Love this idea: You carry around a little Motor/battery pack and pop it on any bike. Rubbee is taking pre-orders on their Kickstarter page.

Specs:

  • Installs in 1 minute
  • 25km (15 mile) /charge with a 2 hour recharge.
  • 25km range
  • Top speed: 25Km/hr
  • 6,5 (kg)/13,2 (lb)
  • Battery pack: 14,4V/ 20Ah/280Wh

The Rubbee Drive system fits every standard bicycle tyre from 16 in to 29 in (700c). Smaller tyre sizes may interrupt a smooth operational use. Width of the bicycle tyre may vary between 20mm to 60mm. expand full story