Joined: 08 Oct 2005
Location: Burnaby, BC, CA
|Posted: Thu Jun 29, 2006 11:55 am Post subject: Tire Load Ratings
|Not a very technical report, just a hands-on observation I have experienced
The load rating for any tire (load index) indicates the maximum weight that each tire is able to support. Below is a quick rating of common Load Indexes start at 94 (the recommended minimum for the MPV):
Load Rating / Load per tire in lbs:
94 - 1477
95 - 1521
96 - 1565
97 - 1609
98 - 1653
99 - 1708
100 - 1764
In my case the tire size was a bit different, going from 255/60 96H to 215/65 100H. I noticed when I went from a 96 to a 100 load rating with the same tire make and model that the cornering improved dramatically. Spungyness is gone. Overall driving 'feel' was better as well. I use the recommended 35PSI now as well where as the 225 I had was at about 40PSI.
Feels like a new drive
2015 Mazda 5 GS w/CP
Mazda OEM rack w/Thule Atlantis 1600
Mazda 1.25" Hitch w/ Thule Helium Aero
Past: 2014.5 Mazda CX-5 GT, 2012 Mazda 5 GS, 2003 Mazda MPV DX
The Wonder from Downunder
Joined: 23 May 2006
Location: Brisbane, Australia
|Posted: Fri Jun 30, 2006 4:36 am Post subject: Re: Tire Load Ratings
|I am folowing your experience closely metalfab as we will be coming up to replace the tyres in the next six months.
We have 94 on at the moment, and I know what you mean about the spongy side of this. I personally think this is an under rating for the Mazda and it's weight.
But then again who am I to question the wisdom a a car manufacturer.
2000 MPV Seychelles Green 279,000 km
Custom Cold Air Intake, K&N Panel Filter
Custom Equal Length Headers and Y pipe
Hi Flow CAT, 2 1/2" with straight through exhaust....ohhhh it makes you smile......
MPV Club Sticker to finish off the package
MPVClub Posting Maniac
Joined: 30 Mar 2003
Location: Tokoroa, New Zealand
|Posted: Mon Jul 03, 2006 3:53 am Post subject: Re: Tire Load Ratings
|The load rating is specifically related to the load the tire is designed for. The sidewalls have to carry the vertical load of the mass of the vehicle at 1G, the stopping load of the car at about 1.0G at max, the cornering G's of about 0.5G and acceleration of 0.45G's.
All of them stress the tire carcase differently. Obviously, the higer the load rating, the higher the number of plies and the stiffer and stronger the sidewalls get. This will also be translated as a stiffer ride and better cornering stability. It may be noisier and "rougher" on the roads even at the recommended tire pressures, and that may not be desirable on a long journey or on rough roads around NY But perhaps the NY residents need the extra load rating to help their tires last longer!!
Graeme + 1 + 4
93 Efini V6 162km
87 Capella/626 1.8i 176km
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78 20ft Trlr Camper