I have just been reading the Bike Commuting Advice pages from British Cycling and on one page about workplaces there is a picture of a bike with a strange contraption on the wheels.

I cant copy the image alone but here is the link to the page.

Can anyone tell me what that strap contraption is on the back wheel?

It looks like it would rub on the wheel to me.

Thanks



http://www.britishcycling.org.uk/tra...--Workplaces-1