I rode up the Clackamas River highway and headed off on an unpaved Forest Service road. There had been a big rain and wind storm the day before so there was a lot of tree debris everywhere. Soon the one lane paved road ended and I was on gravel and mud.
I practiced a few slow speed turning maneuvers, then started veering off the side of the road through big puddles and shallow mud bogs. The Heidenau K60’s gave me tons of grip and really inspired my confidence in what the bike could do.
I went over some grapefruit-sized rocks, through puddles up to the axles, and up muddy slopes. Only once did I dab my foot down for stability, and that was because I did a tight left turn at really slow speed in the middle of a muddy slide. The tires themselves gave me good grip the whole time.
So far, I’m very impressed with these Heidenau K60’s. They buzz slightly at moderate speed, but any knobby tire will do that and it doesn’t bother me in the slightest. I look forward to seeing how many miles I can get on them with the upcoming riding season.