Radical monotube
step thru height (monotube) The monotube is identical to the cityflitzer, but for the main frame. The step-through height is only slightly higher than the chainwheel. The maintube measures 55 mm, and is ovalized at both ends.

(the bike in the background is a Moulton AM 7)

radical monotube Standard framecolor is red, but this prototype was painted blue to emphasise the different frame

The red bits are identical to the standard Radical
Weight  Weight increase approximately 0.5 kgs
Delivery time Special order only, approx 8 weeks