Need Help identifying a set

Dadofquads · 2013-09-16T01:13:50.000Z

I just this week end brought a batch of bulk legos (new hobby) and unfortunately there are no instructions. Usually I can use the parts to find the set, but this one has me stumped. The set has 14 (2 1/2 inch) 6 spoke wheels without any tires. there is on center hole with the X slot and then 6 round holes at the end of each spoke. These are dark gray. These came with a lot of other sets. Hope someone can help me. Thanks in advance