Originally Posted by
brakemeister
if it is a dahon revolve stem ...than yes it could be replaced by a Radius 5 ( V ) .... lets say you have a non height adjustable radius 3 than you could switch to a 2 piece version of it....
The OP has a Downtube Nova which takes a standard 1 1/8 inch headset and stem so I don't think any Dahon handleposts (except pre - 2005) would be compatible.