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What Is The Torque Specification And PSI Rating For A ST175/80R13 Tire?  

Updated 06/29/2026 | Published 06/24/2026

Question:

What is the tork specifications for the lug nuts on a ST175/80R13 C rated radial 5 hole steel rim ? What should the tire pressure be ?

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Expert Reply:

Hey Twig, thanks for reaching out. Most 13" trailer wheels use 1/2" studs, and the recommended torque spec for those is 75-85 ft-lbs.

As for tire pressure, trailer tires should always be inflated to the maximum PSI listed on the sidewall. The Kenda # KE35EV you're looking at has a maximum inflation pressure of 50 PSI, but this can vary depending on the tire. I'd recommend checking the sidewall of your tire to verify the correct pressure for your specific application.

What kind of trailer do you have?

expert reply by:
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Jesse M
Kenda Karrier KR53 ST175/80R13 Radial Trailer Tire with 13" Silver Mod Wheel - 5 on 4-1/2
Kenda Karrier KR53 ST175/80R13 Radial Trailer Tire with 13" Silver Mod Wheel - 5 on 4-1/2
(click to enlarge)

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