No, i'm not talking about those rail-like pieces like under the Sky Diver cars or Flying Bobs cars, but something else. They were ski decals that replicated actual skis like a snowmobile would have up front of it, or an actual sled / sleigh in the snow. When the Flying Bobs cars would "fly" up over the hills, you would see them underneath the cars. Tolve Presentations' Bobs had them in 1988 at the Mule Days carnival, and i think Strates' Bobs had them underneath their Bobs cars at the '91 NC State Fair back then. The replica skis decals were just an added feature to give the cars more realistic-feel to them, to give riders like they were riding real sled cars with a snow theme around the ride. Powers' topless Bobs does look good, but i'm sold on Hildebrand's Flying Bobs. lol [:o)] I mean, have you guys & gals seen Hildebrands' Bobs? Wow! Looks MINT! They must take really good care of it, and yes, it has the top to it.