TL;DR version: what causes a nervous front end that feels too light, with regards to tire choice? Grab a coffee for this quick back story: last year I had new K760 Trakmaster II front and rear (80/100R21 and 110/100R18) that I used with moderately good success. I'm ok with the wear, but the front tire has an annoying tendency to slide sideways in the mud at low speed, I'm told due to the tread pattern. Last fall, I was prepping for a trip to TX that had me buy new tires. I got another K760 rear, though due to availability I got a wider rear, a 120/100R18. For the front, a friend recommended a K772 Parker DT front tire, which I got in 80/100R21. The first test drive revealed a very nervous front end at 80kph+. I could feel it wobble on pavement, but on a gravel road it was downright dangerous. I came home and remounted the tire in reverse, since the Parker DT has a different tread pattern in each direction; the result was exactly the same. I also checked the steering head bearings for any sign of wear and found none. After two more remounts trying different things, I remounted my old K760 Trakmaster II front tire, in reverse of the previous mount direction. A test drive showed the bike riding like it use to ride, smooth and predictable. The K772 Parker DT is narrower and lighter than the K760 Trakmaster. Is this the reason for this result? Perhaps it is exaggerated by the heavier and wider rear tire? I'm still in need of a new front tire that is good in mud and DOT approved. Some people have recommended the Pirelli MT-21, but I don't want to buy new tires again until I understand why I had this problem in the first place. I'm also up for experimenting solutions with the Parker DT. Thanks for the help.