HUGE difference between the two. I won't ride k70's even if period correct. The profile of the tire is quite flat. They look like they'd do a fine job on fireroads and the like but I ride strictly on paved roads. In the '60's and 70's every K70 I ever saw that had some miles on it was scalloped from uneven wear. Modern construction methods may have changed all this, I wouldn't know since I won't buy them.
The K81's rival modern tires in grip and wear, look the part and are not all that expensive either.
Are you all getting real sick of seeing the red headed, bugeyed skank and her loopy girlfriend on the top of nearly every web page? I would be looking for ways to REDUCE size if she was stalking me, that's for sure.
1957 Triumph 6T Thunderbird
1962 Triumph 6T Thunderbird
1974 Norton 850 Commando
1980 Kawasaki KZ550 mule
Last edited by SirDooby; 01-23-2010 at 05:36 PM.