Traction Tires from the 2016 SEMA Show

A few tires that got my attention at the 2016 SEMA Show.

Cooper Discoverer STT PRO in 40×13.50R17LT

Cooper STT PRO 40”

We really live in a super-sized America, maybe world? Tires that would have been almost monster truck worthy a few decades ago are now produced in highway-rated, easy to balance radial designs. Cooper introduced their fantastically rugged, yet tame on-road, Discoverer STT PRO in a new 40×13.50R17LT size.

Cooper has manufactured 40” tires for subsidiary and private label brands; however, this is the first to wear the flagship Cooper name. Two other big sizes were introduced, the 38×15.50R18 and 38×15.50R20. As sizable as these may sound, 35×12.50” tires can be fitted to Fourth Generation Ram Cummins Turbo Diesels with no lift,  stock wheels, and only minimal rubbing.

Mastercraft CXT, a new commercial traction design

Mastercraft Courser CXT

This past summer Cooper subsidiary Mastercraft introduced their latest commercial traction tire, the Courser CXT. The CXT features: variable full-depth siping, silica-rich compound for wet/winter traction (M+S rated), large scallops on the outer lugs and generous sidewall shoulder rubber. They are available in 29 sizes, each with a generous 18.5/32” tread depth. A friend and I have been logging miles on a set, accumulating wear data from two Ram/Cummins trucks. 

Detailed look at the Mastercraft Courser CXT: Mastercraft CXT part one

Mickey Thompson’s new Deegan 38, 5-rib all-terrain design.

Mickey Thompson

Mickey Thompson introduced the Deegan 38 All-Terrain for wheels from 15” to 22”. Twenty-nine sizes are available now, with two more coming in April, and the final two sometime in the second quarter of 2017. Light-truck sizes come with a 55,000-mile tread-wear warranty, and P-metric sizes have a 60,000-mile tread-wear warranty. Mickey Thompson says the new design features a “silica-reinforced compound and special siping for great traction, superior cut and chip resistance, and excellent handling and braking in wet and off-road conditions. Tread element tie bars enhance stability and responsive handling on changing road conditions. Angled shoulder scallops and aggressive two-pitch SideBiter’s enhance traction.”

Ridge Grappler from Nitto Tire

Nitto Ridge Grappler

The newest LT design from Nitto looks like a winner. A hybrid all-terrain with traction lugs for the outer ribs and a slightly lower-void center, it looks like noise should be well controlled. The shoulder tread is beefy, and, as with all Nitto LT tires, there is a different design on each side; you choose. Several sizes are made for 17” to 22” wheels.

Toyo’s Open Country C/T mountain-snowflake rated

Toyo C/T

Manufactures are offering enthusiasts traction tires that are much quieter and less aggressive than mudders but with superior all-weather traction characteristics over a traditional all-terrain or all-season. Toyo eliminated all doubt about the target market by putting it right in the name; C/T stands for commercial traction. The Toyo Open Country C/T was originally only available in Canada, but it was released for sale in the USA in 2016. The C/T meets the mountain snowflake/Alpine severe winter spin-up test requirements. 

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