Community Forums

cyko · 06-07-2007, 10:56 AM

I just bought a set of Goodyear 670 275/70R22.5 tires for my 03 Journey DL. My original Michelins were 5 1/2 years old and had about 47000 miles on them. They looked ok but I decided to play it safe. Anyway, the dealer inflated them to 125 lbs which was correct according to the chart he showed me. I showed him another chart, accessible through the Goodyear website, in which my load (measured at about 4200 lbs per tire) corresponded to a pressure of 90 pounds or less for this size tire. I had them adjust the pressure down to 90 lbs. Is this ok, or should I up the pressure?

cyko · 06-07-2007, 10:56 AM

I just bought a set of Goodyear 670 275/70R22.5 tires for my 03 Journey DL. My original Michelins were 5 1/2 years old and had about 47000 miles on them. They looked ok but I decided to play it safe. Anyway, the dealer inflated them to 125 lbs which was correct according to the chart he showed me. I showed him another chart, accessible through the Goodyear website, in which my load (measured at about 4200 lbs per tire) corresponded to a pressure of 90 pounds or less for this size tire. I had them adjust the pressure down to 90 lbs. Is this ok, or should I up the pressure?

The Clock Meister · 06-07-2007, 11:50 AM

I would feel comfortable using the Goodyear published pressure charts based on your actual axle weights.

Likely that the tire shop was going by the maximum pressure.

Chris

Harry B · 06-07-2007, 11:58 AM

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Anyway, the dealer inflated them to 125 lbs which was correct according to the chart he showed me. I showed him another chart, accessible through the Goodyear website, in which my load (measured at about 4200 lbs per tire) corresponded to a pressure of 90 pounds or less for this size tire. I had them adjust the pressure </div></BLOCKQUOTE>

The proper way to adjust tires is by the weight of the heaviest tire on a given axel.

Then it is recommended to go up one step higher on the chart provided by the tire manufacturer for safety purposes.

So if you are sure of your loaded coach weight, then you are inflating the tires properly.
As was stated before the tire shop probably inflated to the maximum pressure allowed per tire, which gives you a harsh ride and reduces your tire foot print (traction)

bellsharbor · 06-08-2007, 09:53 AM

cyko,

Just did the same thing and asked this question in a post about a month ago. Go with the Goodyear chart. I am running 90lbs front and back while others with the same rig are running just a little higher. 125lbs would give you a very hard ride. So far I am pleased with the ride at 90lbs with the G670's and new Koni shocks.

John