I saw an add on rcu that had a Marder with ribbed front tires on fg rims. I wrote the seller to ask what the front tires were from and he said they were made by fg, but I wrote advance hobbies and they said fg doesn't sell a ribbed tire. I have looked all over different sites but haven't found any. I'd really like to put ribbed tires on front. does anyone know what tires would work?