[darkpuppet]

Looks like someone found a way to make a tire with retractable studs..

from citynews.ca

Quote:Retractable Snow Tires Could Be The Real Wheel Profit Deal - But Will Ontario Get On Board?
Monday March 31, 2008
CityNews.ca Staff
They will be mandatory next fall in Quebec. They're recommended but not required in Ontario. And police say you'll be safer if you use them. But many feel they're an added expense, require a twice-yearly trip to the dealers or simply aren't really necessary. And you can't keep them on permanently because they'll damage the pavement.

They're snow tires and as the winter driving season mercifully seems ready to come to an end in the GTA, the switch back to regular treads for those who have them becomes a 6-month chore.

But what if you never had to make that decision and could avoid the hassle of going from one to the other? That's where a product called "Q Celsius Tires" comes in. The wheels are a remarkable breakthrough in tire technology and could save a lot of lives and a lot of trouble in Canada. 

They feature retractable studs that emerge with the flick of a switch from inside the car. Hit a bad patch of road in the dead of winter and they provide more traction. Reach a section where it's smooth sailing and draw them in.

interesting indeed...