View Single Post
Old 06-01-2015, 10:27 PM   #34
Gordy
Senior Member
 
Join Date: Dec 2003
Location: Grand Forks BC Canada
Posts: 170
Default

So the new Freightliner Cascadia with an18000 lb front axle has 315 80R22.5 tires on it. This tire is spec'd at 9090 lbs per tire at 130 psi.
When I ordered my 2007 Century with a 16000 lb front axle the 315 were the tires that came from the factory.
After the conversion and I scaled at 17500lbs I bumped the pressure to 130 (for the load capacity) and talk about a rough ride.
Then I upgraded my Freightliner from 16000 to 18000lb capacity. I bought new Alcoa 10.5 rims and put 365 70R22.5 Michelin XZA. These are rated at 10500 lbs and to carry 18000 I only carry 100 psi, which makes for a way smoother ride than the 315's I took off.
Not sure how Freightliner calculates tire capacity today but it does seem different than the way they used to.
Gordy is offline   Reply With Quote