well our freindly road dept was Milling and preping the road for re-paving, and let me say that a milled road is rather rough...
but the really bad stuff is that creosote mixture of oil and stuff they spray on the road just prior to paving. AAWWWWWWCrapppp.
I ran through a patch of that oily goo and it made that gound up road stuff stick to the tires. Instant mountian tire nobbs
My tires were rubbing the brakes by the time I was back.
I took a ice scrapper and pushed most of the road crap off the tires and then wiped them down with a light mixture of paint thinner it removed all the tar. Wiped all that stuff off to prevent the tire from dissolving.
PS I do have some nice poka dots on my legs and ars from the tar...
well that was a fun cleaning of the bike, and that chain was pretty messed up too.