There seems to be a problem with the mig21 when you taxi. When you turn the wheels dig into the tarmac as if the tires have almost no air in them. When you straighten out after a couple of meters they pop out of the ground again.
I have tried this on all maps, all airfields, problem persists across all states. I attached 2 track files, one with full pylons and one with a empty plane, when weight is added it is much worse. I have re downloaded DCS and all modules and I use no mods. No other plane I own does this.
To recreate the problem load in the mig with some bombs, and turn while