Originally Posted by
dabac
Why not do a net search on "steerer tube extenders"?
I'm only coming with adaptors that are advertised for Ahead systems (I'd have to read more on those to see how they differe from standard threadless headsets). A couple of examples:
Satori Heads-Up Stem Extender
http://www.sjscycles.co.uk/zoom-head...rks-prod18251/
Zoom HEADSUP2 Steerer Extender
http://www.jensonusa.com/Zoom-HEADSUP2-Steerer-Extender
BBB BHP-22 Steerer Tube Extender
http://www.wiggle.com/bbb-bhp-22-steerer-tube-extender/
I haven't found any comprehensive reviews on them, mostly on whether they are safe/recommended/reliable/etc.