Got a new rear tyre, horrible. Almost worse than my last square one.
Its a k60 so fairly nobbly, great in damp sand, grass and chunky gravel, but in fine gravel (forest road stuff) and on tarmac its a liability. Might be something to do with width/profile compared to the rim. Its a 4" DID rim (I think) with a 5.1" tyre on it (130mm/80% approx), so as factory recommends, but the body of the rear tyre just sits flat and then falls away very steeply. So as you enter a corner it tips in fast, and then just falls to nothing no support. Maybe should go up a size which might force the tyre into a more rounded shape?
Might also have a swing arm problem, no play with arm or any pivot when on centre stand but I suspect it has some movement mid stroke, thing will stop wiggling down the road regardless of camber or how smooth, will have to drop shock out and have a wiggle (annoying as did all the bearings only a year ago).
Today ran without panniers and junk (30-40kg probably) but same tyre pressure (38psi in rear), so much better. Maybe these new tyres (tube type with a tube rather than tubeless with a tube) are much more supple in the sidewall, so need another 5 psi in them, they are no PS4's but certainly better.