Posted by npowell on January 23, 2019 at 10:22:31 from (151.207.250.51):
Gentlemen,
I have a 2013 Subaru Forester. Three months ago, I gashed one tire on a curb (at speed) and replaced just that tire with the same size, but different brand of tire. The other three tires are original and have about ¼ of their useful life left.
It just came to my attention that the Owner’s Manual specifies all four tires should always be replaced simultaneously to avoid mismatched rotation speeds, which could damage the center differential (the one in the transmission/transfer case that accommodates speed differences between the front and the rear). Conceptually, I knew it could be an issue, but I really didn’t think that tread wear difference on the same size tires would be enough to cause a problem. Now, I am seeing things online that suggest otherwise.
Per the link at the bottom, Tire Rack indicates Subaru’s spec is within ¼ inch of tire circumference or 2/32 tread wear. On my car, as far as I can tell, the difference between the new tire and the originals is probably about twice that. The attached driver’s side pic shows the difference in rotation that accrued over approximately 150 feet of straight driving. By my math, it seems the rear probably does about 5 more rotations per mile than the front (which is around 1%). For reference, I’ve also attached a pic of the passenger side after the same 150 feet of driving; surprisingly well-matched.
I suppose I ought to suck it up and do something about it (either have the new one shaved or get four new tires on the car). Before I leap, I figured I might check around to see if anyone knows if the Spec/Owner’s Manual is a spook story to sell tires, or if that much mismatch really can damage the car.
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - On the Road with Dave Gohl: Auction Musings - by Dave Gohl. I was thinking the other day about all the auctions I've been to in the last few years. There've been many. Some have been very good, some have been well, disappointing to say the least. But no matter how good or bad auctions may be, we always seem to stay until the item we've come for or are interested in is on the block. I've been to some auctions near and far. I think the furthest has been the Two Cylinder 7 in the Amana Colonies last year. Lots of stuff, lots of people. I've also atten
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.