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metalfab
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PostPosted: Thu Mar 02, 2006 3:12 pm    Post subject: Tires: OEM presure or... Reply with quote

The door info says the OEM tire presure should be 35 PSI however, if you have replaced the tires with a different size and brand what rating should you follow?

My 225/60/15 tires say Max inflation to 50 PSI. Now I know I won't be maxing them out but since they are a larger tire should I go more than 35...say 40 PSI? I ask because they sometimes feel too soft at current presure.

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
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metalfab
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PostPosted: Thu Mar 02, 2006 3:52 pm    Post subject: Re: Tires: OEM presure or... Reply with quote

Just called the local Mazda dealer. They said its something you'll have to try on your own as it is a wider tire. I was told to try 3 PSI more as a base point and go from there.
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
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subearu
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PostPosted: Thu Mar 02, 2006 7:58 pm    Post subject: Re: Tires: OEM presure or... Reply with quote

It's too early to tell yet, but you can watch tire wear too to see if it's underinflated or over inflated. Somewhere in between 35-40 is probably just right.

I'll be getting new tires for our ES within a couple weeks and will very likely have to do the same increase in psi.

-Brian

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atam
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PostPosted: Thu Mar 02, 2006 9:18 pm    Post subject: Re: Tires: OEM presure or... Reply with quote

I know the manual recommends 37psi for the winter tires. I forgot to check my tire pressure last month and let it drop to 30psi. When I brought all 4 tires back to 38psi, I noticed an improvement in the response ot the van especially when cornering. Sometimes in the beginning of the winter, I will inflate to 40psi, knowing the temperature will drop within the next month. Are you tires H rated? I read somewhere that the speed rating of the tire also affects how the van handles.
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subearu
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PostPosted: Thu Mar 02, 2006 11:24 pm    Post subject: Re: Tires: OEM presure or... Reply with quote

Yep, H tires will tend to be firmer riding than T rated ones. But, other members have replaced the OEM H rated tires with the T's (and have received confirmation from Mazda that these are acceptable). Just stay in the same load rating (95).

-Brian

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JMTRANSAMSD455
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PostPosted: Fri Mar 03, 2006 3:24 am    Post subject: Re: Tires: OEM presure or... Reply with quote

DW's 03ES with OEM Dunlop SP4000 215/60-17 HR tires run great at 38-40 lbs air pressure cold. When MPVs are shipped from Japan, all tires are at 60lbs pressure during shipment so the tires don't develop flat spots. Jack.
2003 ES Sunlight SilverMobil 1,K&N 102,800m Hers,2015 CX-5 Grand Tour AWD2.5 Meteor Grey Mica MOLY oil29,000m2016.5Mazda CX5 TouringAWD DeepChrystalBlue MazdaMOLY GF5 Oil 29,8005m,Son,2008 MAZDA 3S TOURING 2.3L HATCH Aurora BlueK&N Mobil1 78,800m,2015 MAZDA3HATCH 2.5GT Liquid Silver 9000mMOLYOil ,2016 Subaru Forester Limited2.5AWD Quartz Blue Pearl MolyGF5Oil5,115mHers,1974 Trans Am LS-2 Bucanneer Red113Km SOLDr
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metalfab
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PostPosted: Fri Mar 03, 2006 3:39 am    Post subject: Re: Tires: OEM presure or... Reply with quote

atam wrote:
Are you tires H rated? I read somewhere that the speed rating of the tire also affects how the van handles.


Yes, Nokian WR are H rated, load rating is 96.

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
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RallyD
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PostPosted: Sat Mar 04, 2006 5:04 pm    Post subject: Re: Tires: OEM presure or... Reply with quote

forget about the tire placard on the door.

I usually go a few pounds less than the max on the sidewall of the tire i am using. For example if my max press is 44psi i will run 38-40psi.

Its a compromise between tire wear, comfort and fuel economy.

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metalfab
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PostPosted: Sat Mar 11, 2006 5:56 pm    Post subject: Re: Tires: OEM presure or... Reply with quote

I think I found the sweet spot. I was using 35PSI, I tried a few numbers higher and have settled at 42PSI. No more soft corners and the comfort is still there.
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
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mikebai1990
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PostPosted: Sun Mar 12, 2006 11:34 am    Post subject: Re: Tires: OEM presure or... Reply with quote

I usually keep the psi around 3-4 above the recommended pressure. Personally, I don't mind some bumps in exhange for better fuel economy. Smile
2005 MPV LX+ Package, Black Mica, Traction Control, Side Airbags, Wheel Locks, Roof Rack

1993 Acura Vigor GS

http://www.cardomain.com/id/mikebai1990

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atam
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PostPosted: Sun Mar 12, 2006 2:30 pm    Post subject: Re: Tires: OEM presure or... Reply with quote

The temperature in Toronto can be as low as 30F at night and high as 50F during the day. For every 10degree change in temperature, the pressure increase or decrease by 1 PSi. Even if you set the temperature in between, the pressure will still be off by 1 psi.
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SilverMPnyc
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PostPosted: Fri Apr 21, 2006 1:08 am    Post subject: Re: Tires: OEM presure or... Reply with quote

39 front, 35-34 rear. Running 225/55/17 Michelin Synchrones
2005 Subaru Outbact XT 6spd.

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*RIP* 2003 Subaru Legacy L "Special Edition" -6 Spd. & ej205 swap vf23, 1993 Ford Taurus LX
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03LX_ZoomZoom
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PostPosted: Tue Jul 18, 2006 8:13 pm    Post subject: Re: Tires: OEM presure or... Reply with quote

Falken 225/55/17

I use 40 PSI for between 55F - 80F

& 37 PSI for between 80F - 100+F

There's only one way to enjoy driving.... "zzzzzzoooooommmmmmmmmmmm".



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