When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
So I got my new tires put on Saturday. Cooper Discoverer AT3s in 285/65-18. Only problem is that there is one that won't balance so Discount Tire is sending a replacement. The balancer is calling for almost three pounds of weight for one tire!
How do tire manufacturers measure their tires? On Cooper's website, it says this size is about 32.5" tall and around 11.5" wide. When I measure them on the truck (on stock 18" wheels) they measure just under 32" tall and only 10" wide. What gives?
I would imagine that they are measuring in most cases, with the tire NOT installed, inflated on a standard rim. On your truck you will probably have at least a half inch of squish due to the weight.
As for the width, my Nitto's seem to be pretty accurate in real life compared to their advertisements. Perhaps on the width they include the bulge of the sidewall for Cooper? No really sure.
__________________
www.BoostKingTuning.com
2022 F150 Tremor - Current - BoostKing Custom Tuned 440whp on 93. --- 2022 Expedition Stealth H.O. - JB4 Only --- 2018 Mustang Hellion Sleeper - 907 whp on E85
I would imagine that they are measuring in most cases, with the tire NOT installed, inflated on a standard rim. On your truck you will probably have at least a half inch of squish due to the weight.
As for the width, my Nitto's seem to be pretty accurate in real life compared to their advertisements. Perhaps on the width they include the bulge of the sidewall for Cooper? No really sure.
I did measure the tires before they were installed and they measured about the same as installed. Still less than the website specs. The width could be with the sidewall bulge. Don't get me wrong, they look good and they are still larger than stock but I just don't know how they came up with those measurements.
I did measure the tires before they were installed and they measured about the same as installed. Still less than the website specs. The width could be with the sidewall bulge. Don't get me wrong, they look good and they are still larger than stock but I just don't know how they came up with those measurements.
I think they include bulge. Tire rack shows 3 different widths (rim, tread, overall), unfortunately they don't carry Cooper. But the overall (Sect. Width) seems to match to mfgr specs. KO2:
I think they include bulge. Tire rack shows 3 different widths (rim, tread, overall), unfortunately they don't carry Cooper. But the overall (Sect. Width) seems to match to mfgr specs. KO2:
Maybe they measure the tire mold...don't know. Either way, the new treads look and drive good so I'm happy!
Just got my 35s on. Put icon stage 5 kit on, factory block out back and truck sits dead level. Wheels are 17x8.5 method NV's 0 offset. Lots of trimming was required and had to fold the pinch weld on the front edge of firewall as well as trim front valance.
Last edited by Alex Kenison; 09-02-2016 at 12:18 PM.
I don't want to be a noob that asks questions in the wrong place, but I have a 2wd 2013 STX with stock rims and 265/65/17 tires that were on the truck when I bought it. I want to know if I can run these on the stock rims. They're 285/70/17
I know my speedo will be effected by it, but will they fit without a level? I am also looking at leveling it any way, but just wanted to see if anyone has done something similar. I've seen a few in regards to Fx4's, but they do stand a few inches taller in both the front and rear.
08-22-2016, 07:33 AM
