Coker Tire Company FAQ and Tech Articles


  • 1.Do I have to be home for my items to be delivered?
  • 2.Do you have an outlet near me?
  • 3.How do I get FREE mounting and balancing?
  • 4.I ordered a catalog two weeks ago and have not seen it yet. Did you get my request?

FAQ Topics

Tech Articles

  • 1.When Are Tubes Necessary?
  • The first place to look is our product listing to see if the tire is designated as a "tubeless" tire. We always list this on our our website product page, or in our catalog. If our tire is listed as a tube type, that means you must also buy tubes for it. This sounds logical, but we do run into cases where a customer buys tires and forgets about the tubes. Also, any time you buy new tube-type tires, we suggest buying new tubes...that's not a sales pitch, it's the right thing to do. Tubes wear out and deteriorate just like the tires, so it's cheap insurance against a tube failure. For a more comprehensive look at tubes, follow the link below to a full article.

  • 2.What is Aspect Ratio?
  • A tire's aspect ratio determines the height of the sidewall, which ultimately determines the overall diameter of the tire. The aspect ratio is a percentage of the section width. So if you have a 70-series tire, that means the sidewall height is 70 percent of the tire's overall width. Aspect ratio for most bias ply tires is somewhere around 80 or 90 percent. Numeric sized tires (such as 6.00-16 or 6.70-15) that end in zero feature a 90-series aspect ratio, while numeric sizes that end in five (such as 6.95-14) feature an 80-series aspect ratio. Alpha numeric sizes (such as F70-15 or G78-14) have the aspect ratio clearly stated in the size.

  • 3.How Do I Measure Wheel Bolt Pattern?
  • Wheel bolt pattern is all over the map for collector vehicles. Even if you have a basic five-lug pattern, what is the bolt circle, and what wheels fit? We have spent countless hours researching the subject and we're always willing to help customers figure out the bolt pattern on their classic car or truck. Most of the time, it's as simple as one of our Sales Representatives looking through our bolt pattern database, but sometimes it requires measuring the car or wheel to determine proper fitment. Our database includes many four-lug, five-lug and six-lug applications but read the article linked below for a full explanation on how to measure your bolt pattern. 

  • 4.Do You Have A Tire Size Cross Reference Chart?
  • Tire sizes can be a bit confusing, as the size designations changed a lot over the years. From standard bias ply sizes such as 6.70-15 to Alpha Numeric sizes like F70-15, all the way up to modern P-Metric sizing, such as 205/75R15. Even the most savvy car guys have trouble decoding certain sizes, so take a look at this handy chart, and it should help you figure out the bias ply and radial tire size cross reference!

  • 5.When Is a Tire Too Old to Use?
  • Tire age is a tricky subject at Coker Tire, because we manufacture NEW tires that look like old tires. There can be some confusion in regard to tire age, and that's why we wanted to put together this guide to decoding your tire and therefore determining the tire's age. The tire industry has some loose guidelines on tire age that call for tire replacement after 6 to 10 years of service. On a daily driver, you'll likely wear out the tread before the 6-10 year window, but on a collector vehicle, the tire could expire long before the tread is worn out. Even if a car is stored inside and the tires pass a visual inspection (no cracks, dry-rot or other visible deterioration) we typically suggest replacement after 10 years if you plan on driving it.


General Questions

  • 1.I ordered a catalog two weeks ago and have not seen it yet. Did you get my request?
  • Please understand that our catalogs are sent out bulk mail and can take 3 to 4 weeks to arrive. If you submitted your request online or over the phone, chances are we have it in our database, but it just hasn’t reached your house yet. Our entire catalog is also instantly available online by searching our Online Store, or by download at

  • 2. Are all radial whitewall tires the same?
  • There are different types of whitewall tire construction. Our tires are designed and built from the start to be a whitewall radial. Our tires come from the mold with the whitewall built in; we do not add it after the tire is made.

  • 3.What Tires Do I Need for My MOPAR E-Body ?
  • Looking for the correct tire fitment for your E-Body Project? Check out this quick E-Body Tire Guide to get you started.


Shipping & Pickup

  • 1.Do I have to be home for my items to be delivered?
  • No. If you are unable to be home for delivery, the FedEx representative will leave your package in a safe place so that it’s available when you arrive home. Please be on the look out for the tires or packages. If the driver feels that it would be unsafe to leave the package without anyone being home, the packages will be brought back to the FedEx facility and you will be contacted to arrange pickup.

  • 2.How do I get FREE mounting and balancing?
  • We offer free mounting and balancing when you order a set of both tires and wheels on the same order. A vintage tire specialist then does the mounting and balancing at our warehouse and ships them out ready to go on your car.