RE: [DML] Tire pressure was proper wheel alignment specs
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RE: [DML] Tire pressure was proper wheel alignment specs




 Interesting. I posed a question in this same vein nearly 2 yrs ago when my room mate at Boy Scout Camp told me he inflates his Ford SUV to max press. (45 PSI) because it was on the TIRE. The answer concensess seemed to be: Adhere to vehicle specs, not what is on the tire. My '38 Buick tires are low press., & after 70 yrs and wearing modern tires, I still use the VEHICLE specs.   ALSO, my orig. rear NCT's wore out in the middle at 25,000 mi. As noted, I am a stickler for proper air press. so I was puzzled at that wear pattern (as well as the early replacement).   Feed back from T-Town.      Drive Stainless     Robert  VIN 6924   
----------------------------------------
> To: dmcnews@xxxxxxxxxxxxxxx
> From: brobertson@xxxxxxxxxxxx
> Date: Tue, 29 Jan 2008 18:52:06 +0000
> Subject: Re: [DML] Tire pressure was proper wheel alignment specs
> 
> Max pressure cast into the sidewall is max recommended for that tire
> alone -- that's it, nothing more. Of course Goodyear and Firestone
> have no idea what kind of vehicle that tire will ultimately be
> installed on. For example, the exact same Goodyear Integrity,
> 235/75-15, runs 26-28 PSI on my Lincolns and 35 PSI on my F-150.
> That's why manufacturers post their own recommended inflation pressures.
> 
> Use the manufacturer's specs of course.
> 
> That being said, there are other considerations. For example, higher
> inflation pressures yield slightly better fuel economy. Ford gradually
> increased inflation specs on my Lincolns from 26 (1977) to 28 (1979).
> Vehicle didn't change a lick -- it was merely an attempt to meet CAFE
> standards. Of course higher inflation pressures sacrifice road
> adhesion. That's why the DeLorean has a surprisingly low 23 PSI up
> front (I round mine up to 25).
> 
> Higher inflation on a steering axle tends to wear the center tread
> faster. Lower inflation moves that wear towards the edges. Rear axles
> don't have radical geometry changes so it doesn't matter as much.
> 
> Higher inflation makes the tire harder and less able to absorb
> pavement imperfections. Lower inflation makes the tire softer and less
> able to support axle weight.
> 
> How about spares? I try to keep mine at max sidewall pressure (my
> vehicles carry full size spares). I figure the extra air can be bled
> off when I put them into use. The key word in that sentence is "try"
> This Xmas, enough had bled off of one of my trucks' to actually be a
> few lbs low.
> 
> Bill Robertson
> #5939
> 
> >--- In dmcnews@xxxxxxxxxxxxxxx, Bryan Pearce <bryanp@...> wrote:
> >
> > All:
> > 
> > Occasionally I catch a post that I feel compelled to respond to.  The  
> > tire pressure comment below is one such post.  IMO, using the tire  
> > pressure listed on the tire is not the way to go with the DeLorean.   
> > This is particularly true for the front tires.
> > 
> > I am curious as to what other owners have experienced regarding this  
> > issue.
> > 
> > -- 
> > ===============================================
> > Bryan Pearce
> > Pearce Design Components
> > ===============================================
> > 
> > 
> > On Jan 27, 2008, at 6:02 PM, Bruce Alan wrote:
> > 
> > > Be sure to keep your NEW tire pressure correct for the vehicle (NOT
> > > according to the veh sticker but according to the rating on the  
> > > tires),
> > 
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
> 
> 
> 
> 
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> 
> 
> 

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