Australian term for bicycle, the shortened version of deadly treadly commonly associated with mountain bikes because of knobbly tread on the tires.

Deadly treadly is fondly used by owners of bikes who have to wear their cajones on a frequent basis, namely BMXers, freeriders and dirt jumpers or basically any bike that can and usually does result in death or serious injury.
I just picked up a sweet freeride treadly, now Im gonna bomb off 12 foot drop offs and go hucking like a motherfucker
by Coinage September 12, 2006
(Aus) Bicycle.

Australian expression for push-bike
"Catchyalayda mate. I'll be round on my deadly treadly"
by Gari July 30, 2005