Tire pressure for radials

WINST10 · May 2024

Hi everybody! This question has probably been asked dozens of times, but what tire pressure would you use for radial tires on a stepdown? I have a '51 Pacemaker and I am running Diamond Back Auburn Deluxe radials size 710R15. Thanks!

ratlee2 · May 2024

I run Diamondback I tires with a 3" whitewall in a 225/75R15. When I reached out to Diamondback and asked if I need to run a higher tire pressure to keep the wide whitewall from separating, they recommended keeping them at 40PSI. That seemed a bit high, so I bumped them back to 38PSI.

atc · May 2024

Yes, I also have Diamond Back radials (wide whites, 215/75R15) on my Hornet. They are high inflation high speed tires and DB recommended 44-46 pounds for my application. Their motivation is keeping the white wall straight and prevent separating.

WABOOM · May 2024

Interesting. I have DB's on my Hornet and actually made a warranty claim for bubbled white walls, they replaced the 2 affected tires. But they never mentioned tire pressure.

atc · May 2024

This is the tire I'm using. It talks about speed ratings and specifies the inflation rating of 44PSI.

Diamond Back I - 14 Inch White Wall Tires & 15 Inch White Wall Tires

https://openforum.hetclub.org/home/leaving?allowTrusted=1&target=https%3A%2F%2Fdbtires.com%2Fproduct%2Fdiamond-back-i%2F

Diamond Back Classic Tires is an online tire shop that creates tires such as the Diamond Back I. Diamond Back creates white wall tires, redline tires, blueline tires, goldline tires and other vintage tires for pre-1976 vehicles including Corvettes, Mustangs, prewar cars, postwar cars, European cars and more.

It's probably worth talking to a rep to be sure what's right for you. I dont know if OP is using these or not of course!

Tire pressure for radials

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Diamond Back I - 14 Inch White Wall Tires & 15 Inch White Wall Tires

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