Quote:
Originally Posted by Kevin M
Tramlining is primarily a function of tread design, then sidewall, then compound. Responsive tires tramline more than softer, squishier tires.
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So, I think you just made my point that his old tires were more responsive, right? And Yes and no depending on what you mean by squishier. Squishier could mean stickier compound...
Let's be more specific.
Hunting, or Tramlning is what happens when the tires follow the groves in the pavement. since the only thing operating is tread block to asphalt adhesion/friction, it is the primary cause. Alignment can exacerbate it, but is not the cause. Anything that permits lateral displacement of the tread blocks or sidewalls can reduce it's effects.
Take a racing slick. There is very little ability for the next rubber that will be contacting the road surface to move left or right of that which is currently in contact, so they tend to continue in the same direction. Only actual slippage of the tire really permits it to move laterally.
With a new all season with tall, thin and thus flexible tread blocks, the next tread block could easily land a mm left or right of where the last one currently in contact did assuming the later is being deflected by the lateral pull of the surface. No slippage is really required for this.
If the groves are fairly straight and parallel to the direction of travel, the sidewall flex can also dissipate the hunting as long as it does not exceed the sidewall's ability to deflect. The mass of the car want's to keep moving in the same straight line. If the sidewalls can flex left and right to permit that without transmitting much force to that mass, the driver will feel it less even if the contact patch is actually hunting all over the place.
If two tires have the same tread, but one is of a less friction/adhesive compound, that one will hunt less as the blocks are more likely to slip.
So, as I said, a tire with larger shorter tread blocks and stickier rubber in that order will tramline more.
And Cody, go right on convincing yourself tire A is better than B. Unless you actually drive them in the same condition back to back against a clock, your opinion is just that. No one can make a remotely objective comparison of their worn out old tires to whatever they just put on and spent much money on. Thus user reviews are marginally better than a poke in the eye.
And if you honestly believe AVS 100s do not kick the RE92s ass in every performance respect except maybe snow traction and "comfort", you need to have your butt accelerometer adjusted.
The data says you are very, very wrong.