There are matching ones out there. If you were in Canada I'd suggest checking out PMC Tire. We bought some Toyo Winters off them and they've been good. They also have Minerva, Wanli, Kuhmo and Continental winter tires that fit the Smart.I've also read that Contiwintercontact tires are not great on icy roads... I guess they have good traction in snow, but not ice. I've been looking for tires day and night and can't find ANY that match the OE size other than the Conti's... I guess the conti's will still perform better this winter than all season tires in general so I'll have to buy them. I hope they at least make a difference!