Thought you might like to see what Heidenau K60s look like on a WR250R. I have a giantloop with ortlieb bag on the rack and the luggage weight is less than 25kg fully packed.
This is the 90/90 front tyre after 9,900miles of tarmac across Europe, Iran and Central Asia..
This is the 120/90 front tyre after those same 9,900miles...
The front IS noisy and should be run backwards
They are cheap here in Europe (GBP87 for a SET)
They give great road holding and encourage good lean angles on my R
They lack the proper drive of a knobblie tyre offroad but maintain control offroad when laden
These tyres DO need to be balanced. They needed a fair bit of weight to balance.
They are a versatile choice for long journeys where it's mostly tarmac/piste with a little rough stuff.