for those interested, just put tyre "name, model and tramline" word and google it..
for every tyre you may find an owner talking about tramlining..
but high performance tyres "interestingly" without exception..
I do hope your not finding SMD's and TheBoys problems with tramlining amusing cem.
all wide tyres tramline less or more.. full stop.. and if you expect something different , you will be dissappointed..
and I think you are playing for the tribunes again Chris..
I'm guessing you have never tried Sport Maxx TT on your Omega cem? On a properly set up chassis, pumped to around 30-32 psi, then you will get an idea of stability. And grip, as it happens, as well. And this remains like this from new, all the way to well beyond the legal limit in the UK (1.6mm), come rain or shine. In fact the first thing that alerted me to how worn they were was a high speed rear end aquaplane moment on one of the negative camber sweepers on the A43 about 7 miles from here on Christmas Eve (boy, was it raining).
Or Dunlop Sport 9000. Again, stable until about 3mm (then they absolutely fall off a cliff - more than once I've though something had broken).
Or Conti SC2/3 (generic). I always felt the SC2 had more grip than SC3, so after 1 set of SC3s, always shyed away from them.
As to holding the wheel tighter, thats ridiculous, and shows a lack of understanding of what the problem is. You need to feed in corrections to make the car go straight. If you rigidly held it in one place on a straight piece of road, you'd soon be off the black stuff.
Driving on the motorway (UK motorways have quite wide lanes), you daren't do more than a very quick glance in the mirrors, as you need to be looking at keeping the car in your lane.
Moderate braking, you need room, as the front of the car will squirm violently left to right. In the dry, you can hear the tyres fighting for grip as it does so.
All of this proved to be tyres. 100%. The advantage of 2 Omegas is I can swap wheels, and see where the fault moves.
SC5s are unsuitable for the Omega