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Logic for or against the tire-rotation pattern X > H > X > H
On Monday, September 4, 2017 at 10:06:10 AM UTC-10, micky wrote:
> In rec.autos.tech, on Sat, 29 Jul 2017 15:10:12 -0700 (PDT), dsi1 > <dsi1yahoo.com> wrote: > > >On Saturday, July 29, 2017 at 11:26:32 AM UTC-10, Andy wrote: > >> On Saturday, July 29, 2017 at 12:21:28 PM UTC-5, dsi1 wrote: > >> > On Friday, July 28, 2017 at 9:44:45 AM UTC-10, Roy Tremblay wrote: > >> > > What do you think about the 4-tire rotation pattern below? > >> > > X > H > X > H year 1 > >> > > X > H > X > H year 2 > >> > > etsetera > >> > > > >> > > Basic assumptions: > >> > > Assume the alignment is within spec. > >> > > Assume the fronts consistently wear differently than do the rears. > >> > > Assume that F->B differential wear is symmetric per axle. > >> > > Assume the spare is a donut and therefore out of the picture. > >> > > Assume a rotation every change of seasons (about 4K miles roughly).. > >> > > Assume bidirectional tread. > >> > > Assume whitewalls on one side (otherwise I could flip them on the rim). > >> > > Assume USA crowns, which is to say almost no crown most of the time. > >> > > > >> > > How does the logic of this X > H > X > H rotation pattern look to you? > >> > > > >> > > Assume tires go on in year 1, front to back, numbered: > >> > > 1 2 > >> > > | > >> > > 3 4 > >> > > > >> > > The first X-pattern rotation in Spring of year 1 gets us: > >> > > 4 3 > >> > > | > >> > > 2 1 > >> > > > >> > > The H pattern in Summer of year 1 gets us to: > >> > > 2 1 > >> > > | > >> > > 4 3 > >> > > > >> > > The X pattern of Fall of year 1 gets us to: > >> > > 3 4 > >> > > | > >> > > 1 2 > >> > > > >> > > And then, finally, the Winter H pattern of year 1 gets us back to: > >> > > 1 2 > >> > > | > >> > > 3 4 > >> > > > >> > > At the end of the year, with this X > H > X > H pattern I devised, I think > >> > > the tires would have been on every combination but always as a set per axle > >> > > because my fronts wear differently than do my rears. > >> > > > >> > > If I flip them on the rim, does that help in giving me rotation options? > >> > > >> > My guess is that tire rotation is mostly a device used by tire companies to get people to come into their shops on a regular basis. I've never done it nor am I likely to ever start. I don't have enough time and money to just toss it into the wind. > >> > >> Rotating tires and re-balancing increases their life and places like Discount Tires do not charge for the service. > >> > >> Not doing so is "tossing money into the wind". > >> But tire companies love you. :-) > >> > >> Andy > > > >No charge, that's great! Now if they can rotate the tires in 60 seconds or less, I'd go for it. Ideally, you want your tires to be rotated every night while you're sleeping. I believe that would be the best way to go. > > My tires rotate whenever I drive. I've checked. I had someone else > drive the car in a parking lot in circles and sure enough, the tires > rotate. You are smart to make sure your tires are rotating. Most people just assume that all their tires are rotating. Non-rotating tires will wear out faster than you can say "Tire Wearhouse." That is, of course, unless you have four non-rotating tires in which case, the tires will pretty much last forever.. |
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