Neil,
One could say that there are no such things as Diamond Back tires. DB is a
company that galvanizes white walls to tires of your choice brand. Or, if
you do not have any preference, they'll pick the brand for you.
Because US laws mandatory require tire specifications on the outside
sidewall on each tire, DB applies the white walls to the inside sidewall of
the tire, saving the tire specifications, and the tires are to be mounted
with the outside sidewalls in. Unlawful, so to speak.
So, you most likely can read the maximum pressure/load info on the inside.
Happily you told us before it reads 'Federal MH311 LRV 215R14C 8PR
112/110N', which makes things a lot easier here!
You tires are Light Truck/Trailer 82 series 215R14C (equalling 75 series
215/75R14) www.federaltyres.com/ms311. LRV probably meaning something like
'Light Recreational Vehicle' in Taiwan?
'C' stands for load range C, which is a hefty 50 psi maximum load (the
tire's pressure under which it's able to carry it's maximum weight).
112/110N is the load index/speed symbol, '112/110' meaning it can carry
2470/2337 lbs and 'N' meaning you shouldn't go over 87 mph. The latter might
be something of your concern...
8PR means 8 Ply Rated, which is slightly over the given load range C,
actually equals load range D, which has a 65psi max load.
All this info can be read on this nice site:
www.tirerack.com/tires/tiretech/tiretech.jsp
So, to answer your question: yes, you can safely use 40 psi with your tires
and you can even go to 50 psi! Probably more, but you'll have to read the
small print on the inside sidewall of your tire for that.
Jim.
'57 Dodge x2.
-----Oorspronkelijk bericht-----
Van: Forward Look Mopar Discussion List [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]
Namens eastern sierra Adj Services
Verzonden: woensdag 11 april 2007 7:31
Aan: L-FORWARDLOOK@xxxxxxxxxxxxx
Onderwerp: [FWDLK] You load 40 LBS; whaddaya get?
I just happened to increase the pressure on my Diamondback radials to 40
PSI , on the front tires; the rears are still at about 34 PSI, and
noticed greatly improved handling & braking response.
Has anyone run a high-air-pressure on their radial tires? Any negative
results?
Back-in-the-day, road testers said they applied
around 36 PSI to the bias ply tires , so, maybe 40 isn't too high. What
WOULD be too high?
Neil Vedder
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