so, true story, threw a chain on my r6, went through the case, soaked everything in oil, sold it, dude rebuilt it, ran it all last year on the same rear tire that was literally soaked in oil. now, he's also been riding for around 40 years and way more experience than me. i don't have the confidence to use an oil soaked tire, however, once cleaned properly, which i've been told there are a variety of ways, they are fine. however, i have no confidence to do so and i dont recommend it either. i've come to find confidence, is what makes or breaks ya on a bike.