They're steel so they're not that light, I have used Yoke A008 tires on them now, so I couldn't get you an exact weight, but I can get you a ballpark...
They're my only autox tires, so I would want to work out a trade + some cash for something bigger, 13x7 or 13x8 (yowsers), w/ or w/out tires.
Do you know anyone selling 13x7s for a Rabbit?
PJ
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83 Rabbit GTI - future ITB