Larger tires and PSI
I bought an older 5th wheel last fall, tires were poor at best (date code 2003. I bought new tires and wheels last week, went from a 205/75-14 to Goodyear Marathons, 225/75-15s. New tires have max of ...
Forum Discussion
wa8yxm wrote:Tireman9 wrote:
because the tires are not turning and pointed toward the center of the true circle.
Please explain, Thank you.. Epically the "Not pointed toward the center of a true circle" part... They should be pointed tangentially to a true circle,
While I am not Tireman9, I am a colleague of sort. Perhaps I can explain where he is coming from.
First, the axles on a trailer are parallel, so the tires can't be tangential when the vehicle is going around a curve. Each tire is at some angle to tangential and each is different.
Second, in order to develop a side force to turn the mass of the vehicle, the tires have to develop a slip angle - a difference between the direction the tire is pointed vs the direction it is actually rolling. When going around a corner all these slip angles are away from the direction of travel, so that makes the situation actually worse (and more complicated.) If you draw the lines, you'll find the resulting vector is aft of the axle centerlines.
