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X5 E70 (2007 - 2013)
E70 BMW X5 produced between 2007 and 2013. Discuss the E70 X5 with other BMW owners here.

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  #1  
Old 03-20-2013, 09:13 AM
Ace88 Ace88 is offline
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Question Tire pressure for our 20" Dunlops etc..?

Hi all,

Did a search here and there doesn't seem to be much discussion on specific tire pressures for our 20" tire package. My door placard states 33 front / 35 rear. I have been following this like gospel and use a very expensive US made gauge to maintain it but I question...Is this the optimal proven pressure range for best wear?

Thanks
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  #2  
Old 03-20-2013, 10:44 AM
rodnjen rodnjen is offline
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That seems a little light for the weight of that vechicle. I have the Dunlops and need new front tires at 14k miles, backs are great. I run 42-43 most of the time.
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  #3  
Old 03-20-2013, 10:55 AM
Alpine300ZHP Alpine300ZHP is offline
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My x5M has the same size wheels and tires and the recommended pressure in that car is 38/38. I find that to be in line with what I thought was appropriate and that is what I am using so far.
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  #4  
Old 03-20-2013, 04:37 PM
Ace88 Ace88 is offline
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I had a feeling the responses would be all over the place. I agree that 33 front and 35 rear sound low but I've been maintaining that as BMW has it posted on the X5 for the 20" tire set-up. I also think 42-43 sounds too high as 44 lbs is the max on the tire itself.

I'm just wondering if there is a proven happy medium that provides great wear, handling, and comfort.

Interesting to see who else chimes in and kind of take an average from all the responses.

Thanks
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  #5  
Old 03-20-2013, 07:14 PM
brian5 brian5 is offline
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Mein Auto: 08 X5 4.8i
For 20" tires, it's on my X5's B-pillar and also in the manual under "Tire inflation pressures".

2 rows of seats with or without sports package:
Up to 100mph (all load sizes). 32 psi front and 32 psi rear

3 rows of seats with or without sports package:
Up to 100mph (all load sizes). 32 psi front and 35 psi rear

I have 3 rows of seats and have always run mine at 32 psi in front and 35 psi in rear. My tires have worn evenly so this seems to be correct pressures for the 2008 X5 (3.0si and 4.8i models).

Last edited by brian5; 03-20-2013 at 07:16 PM.
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  #6  
Old 03-20-2013, 07:54 PM
Ace88 Ace88 is offline
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Here are the door stickers on my 2012 X5 35D

My 2012 X5 35 Diesel with 20" Dunlops has these stickers on the drivers door jamb.

The small yellow sticker states 38 Front / 41 Rear for speeds ABOVE 100 mph, for speeds UP TO 100 mph it states to use the psi numbers on the larger sticker which are 33 Front / 35 Rear.

Of course I don't drive at speeds above 100 mph so I have been using the 33/35 settings.
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  #7  
Old 03-20-2013, 07:56 PM
Ace88 Ace88 is offline
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Sorry the pic is upside down
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  #8  
Old 03-23-2013, 12:19 PM
Ben_XI Ben_XI is offline
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Mein Auto: 2011 X5 50i
I'm running the Bridgestone Duelers in 20" at 42 psi all-around. This was recommended by the shop who did my alignment for even tread wear. About 5K miles now and so far so good.

The Duelers max psi is 50.
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  #9  
Old 03-23-2013, 10:09 PM
Ace88 Ace88 is offline
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Quote:
Originally Posted by Ben_XI View Post
I'm running the Bridgestone Duelers in 20" at 42 psi all-around. This was recommended by the shop who did my alignment for even tread wear. About 5K miles now and so far so good.

The Duelers max psi is 50.
Hi Ben,

Does your door sticker state 33 front and 35 rear like mine does? 42 psi sounds so high to me. And shouldn't the fronts vs. the backs be at different PSI because they are different size tires? Maybe not....I have no idea. I have to get Ard involved in this one.
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  #10  
Old 03-24-2013, 05:47 AM
brian5 brian5 is offline
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It's obviously not the same recommendations for every X5 model. Even for my model year, it differs if you have 2 rows of seat vs. 3 rows of seats.

If you buy the X5 with 20" wheels, the door sticker gives you the psi. If you didn't, consult the "Owner's Manual". It does not need ard's input on this one. It requires RTFM...
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  #11  
Old 03-24-2013, 05:57 AM
RockChips RockChips is offline
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Quote:
Originally Posted by brian5 View Post
consult the "owner's manual". It does not need ard's input on this one. It requires rtfm...

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  #12  
Old 03-24-2013, 08:44 AM
ard ard is online now
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I run 38F 35R... Mich latitude 255/50-19

The car never has a load in the rear, with more weight up front hence the higher pressure where their is more load.

I tended tontitrate tire pressure based on handling and tire wear...I ignore e manual and door placard.

I've found that lower pressures (ie what bnw recommeds) will result in excessive edge wear..especially up front as the tires tend to roll on cornering and scrub the edges.

I'll point out that the blind 'follow what BMW says' mentality' - be that no tire rotation, or lifetime ATF fluid, or 100,000 mile fluid changes, or just let the computer tell you what to do- has failed owners.... Most short term owners will not realize thins, but those that keep cars 100, 200k will understand. IMO

A
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  #13  
Old 03-24-2013, 09:07 AM
brian5 brian5 is offline
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ard,

Not disputing that people should not just blindly follow what BMW says. I'm saying that there appears to be different recommendations for different models of different years. The place that one should start is the owner's manual. There is no one that can be expected (e.g. ard) to be able to make recommendations for a particular model. My dealership always like to put more into the air every time they get their hands on my car.

The OP's question was about 20" tires.

As stated earlier, I have found that my tires have worn perfectly evenly at the BMW recommended 32 psi front and 35 psi rear for both sets of my 20" tires so I have no reason to change that.
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  #14  
Old 03-24-2013, 10:53 AM
Ace88 Ace88 is offline
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Quote:
Originally Posted by brian5 View Post
It's obviously not the same recommendations for every X5 model. Even for my model year, it differs if you have 2 rows of seat vs. 3 rows of seats.

If you buy the X5 with 20" wheels, the door sticker gives you the psi. If you didn't, consult the "Owner's Manual". It does not need ard's input on this one. It requires RTFM...
I didn't need a cocky response from you. I've read the owners manual inside out. There are many variables (including 3rd row) and there seems to still be much variation when talking apples to apples. This also includes alignment numbers as what BMW recommends is NOT the best for all and may or may not be advantageous to tire wear.

Tried and true time tested feedback (such as from Ard) has been the biggest help, your feedback has not, I'm not trying to be a dick here but lets be a little more helpful.

Thanks
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  #15  
Old 03-24-2013, 10:58 AM
RockChips RockChips is offline
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Quote:
Originally Posted by ard View Post
'follow what BMW says' mentality' - be that no tire rotation

My dealer always recommends tire rotation. It is listed with all the other services on the computer printout.
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  #16  
Old 03-24-2013, 10:59 AM
Ace88 Ace88 is offline
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Quote:
Originally Posted by brian5 View Post
ard,

Not disputing that people should not just blindly follow what BMW says. I'm saying that there appears to be different recommendations for different models of different years. The place that one should start is the owner's manual. There is no one that can be expected (e.g. ard) to be able to make recommendations for a particular model. My dealership always like to put more into the air every time they get their hands on my car.

The OP's question was about 20" tires.

As stated earlier, I have found that my tires have worn perfectly evenly at the BMW recommended 32 psi front and 35 psi rear for both sets of my 20" tires so I have no reason to change that.

Brian,
I thought that by stating in my earlier posts that I don't drive in excess of 100 mph and that by displaying my door placard that states I have 2 rows of seats and NOT 3 rows that I'd get some similar feedback from other 20" tire owners of the 35 diesel.
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  #17  
Old 03-24-2013, 11:04 AM
Ace88 Ace88 is offline
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Coming from three Porsche's in my past, tire pressures and oil were very common discussions at Rennlist, on the X5 35d not that much. I am anal about taking care of my vehicles and always look for that perfect blend of proven recommendations in care and maintenance.

Thanks
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  #18  
Old 03-24-2013, 11:11 AM
Ace88 Ace88 is offline
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Quote:
Originally Posted by ard View Post
I run 38F 35R... Mich latitude 255/50-19

The car never has a load in the rear, with more weight up front hence the higher pressure where their is more load.

I tended tontitrate tire pressure based on handling and tire wear...I ignore e manual and door placard.

I've found that lower pressures (ie what bnw recommeds) will result in excessive edge wear..especially up front as the tires tend to roll on cornering and scrub the edges.

I'll point out that the blind 'follow what BMW says' mentality' - be that no tire rotation, or lifetime ATF fluid, or 100,000 mile fluid changes, or just let the computer tell you what to do- has failed owners.... Most short term owners will not realize thins, but those that keep cars 100, 200k will understand. IMO

A

Hi Ard,

The Michilins you are running are NON run flat aren't they?? Don't the run flats have stiffer side walls than non run flats? If so I'd probably want to try a TP slightly less than your running due to maybe less roll on cornering with the run flats?
Thx
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  #19  
Old 03-24-2013, 12:15 PM
ard ard is online now
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Quote:
Originally Posted by Ace88 View Post
Hi Ard,

The Michilins you are running are NON run flat aren't they?? Don't the run flats have stiffer side walls than non run flats? If so I'd probably want to try a TP slightly less than your running due to maybe less roll on cornering with the run flats?
Thx
No, they are runflts- ZP or "Zero Pressure' in michelin speak.

Some rfts DO have stiffer sidewalls and some RFTs DO have worse rides/handling. But I've really liked the last 45k miles on two sets of Latitude Runflats on two different X5s. ( Have PS2s on two other cars, ATX on a truck and Cross terrains on an SUV. I may have bought the Koolaid, but I have never had a bad experience with Mich.)

Back to air presssure- I am of the opinion that above the placard and below the maximum on the tire, knock yourself out. In this area you are 'safe', and you are titrating handling and wear. Figure out what works for YOUR roads, YOUR loads, YOUR driving style

A
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Last edited by ard; 03-24-2013 at 12:16 PM.
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  #20  
Old 03-24-2013, 01:17 PM
Ben_XI Ben_XI is offline
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Quote:
Originally Posted by Ace88 View Post
Hi Ben,

Does your door sticker state 33 front and 35 rear like mine does? 42 psi sounds so high to me. And shouldn't the fronts vs. the backs be at different PSI because they are different size tires? Maybe not....I have no idea. I have to get Ard involved in this one.
Ace88,

my door sticker reads 32 front and 35 rear, but this is for the 18" set-up. My vehicle did not come stock with 20".

Since the load in my vehicle varies, I just keep it the same all-around.
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  #21  
Old 03-24-2013, 01:21 PM
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ndabunka ndabunka is offline
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Quote:
Originally Posted by rodnjen View Post
That seems a little light for the weight of that vechicle. I have the Dunlops and need new front tires at 14k miles, backs are great. I run 42-43 most of the time.
No WONDER you are wearing them out early! That is a REALLY high pressure for run flats. You are probably wearing the centers out, right? It probably also rides like a rock, doesn't it?
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Last edited by ndabunka; 03-24-2013 at 01:22 PM.
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