Tire Pressure

[Al Spivey]

I left Williamsburg, Va. this morning and before I left, I made sure the tire pressure was exactly 90 lbs. (cold pressure). I know this was right because I used 2 different tire gauges. When I arrived home in NC, I checked the pressure again. After driving over 250 miles, the pressure show 102 lbs. I had the same slamming and bamming again on some very sorry roads. Does this sound right that (hot tires) can build up to that much pressure? All I know is that it was a very stressful day over some bad roads. My coach gave a new meaning to the term, Rock and Roll. I have just about decided to go with the Koni Shocks that everyone has suggested. Now, what should I do about tire pressure?? I started the day with 90 lbs in all tires. Reason being is that I have been on a trip and I was getting close to full weight with fuel, water and supplies, etc. Where can I get a realistic price on Koni shocks?? What amount of pressure has proven best for 22.5 inch tires?? Thanks for any help or suggestions. Al

[Al Spivey]

I left Williamsburg, Va. this morning and before I left, I made sure the tire pressure was exactly 90 lbs. (cold pressure). I know this was right because I used 2 different tire gauges. When I arrived home in NC, I checked the pressure again. After driving over 250 miles, the pressure show 102 lbs. I had the same slamming and bamming again on some very sorry roads. Does this sound right that (hot tires) can build up to that much pressure? All I know is that it was a very stressful day over some bad roads. My coach gave a new meaning to the term, Rock and Roll. I have just about decided to go with the Koni Shocks that everyone has suggested. Now, what should I do about tire pressure?? I started the day with 90 lbs in all tires. Reason being is that I have been on a trip and I was getting close to full weight with fuel, water and supplies, etc. Where can I get a realistic price on Koni shocks?? What amount of pressure has proven best for 22.5 inch tires?? Thanks for any help or suggestions. Al

[smlranger]

Al:

I think most will agree that whatever pressue you decide to use based on actual weights and the appropriate tire load/inflation chart, the target is when the tire is cold. I suspect the increase to 102 was normal due to heat.

IMO, the Koni FSD's are well worth the money. They certainly softened the ride on my Journey without any adverse effect on handling. I got a good price from KONIrv.com (FMCA members pay no shipping).

[DAN L]

AL,
use find, then search to check previous posts, including mine, about tire pressures, pressure rise, temperatures, ir temp gauges, thumping tires, etc.
SHOX.COM has the best prices on konis that i have found so far, and includes shipping. over $100 less than koni.com including shipping.

[AFChap]

Al

The best pressure for your tires is the recommended pressure by the tire mfg for the weight you are carrying on that tire. The only way to know that pressure is to know the four-wheel weight of your RV as you travel, and then refer to the mfg tire pressure chart. If you absolutely cannot get a four-wheel weight, you can approximate it by getting axle weights.

As mentioned, the recommended pressure is "cold", before hitting the road. Hot tires will show an increase in pressure, and you should NEVER let air out of a hot tire to adjust pressure downward to the recommended level.

[FDchief]

Very normal pressure on a hot tire. Altitude will also increase your tire pressure. Here is an experiment for you; place a bag of chips in your hot trunk at sea level, then drive to 6,000 feet of elevation. You will have a oblong beach ball when you get there.

[Pubtym]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by FDchief:
Very normal pressure on a hot tire. Altitude will also increase your tire pressure. Here is an experiment for you; place a bag of chips in your hot trunk at sea level, then drive to 6,000 feet of elevation. You will have a oblong beach ball when you get there. </div></BLOCKQUOTE>

Exactly...greatest pressure change rate occurs from sea level to 5000 pressure altitude. Also NEVER readjust-lower tire pressure at 5000' or above if you will be decending to much lower terrain on your trip..