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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 09-28-2012, 10:10 AM
dfgoss dfgoss is offline
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530i sport pkg tires

Owners manual for 2003 530i w/ sport pkg shows 235/45/17 tires on front rear shows to go up to 255/40/17. Car has 245/45/17 on all 4.
Should 255/40/17 be or rear? If 235 or 245/45 are on all 4 what are the issues?
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  #2  
Old 09-28-2012, 10:50 AM
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champaign777 champaign777 is offline
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245/45/17 on all 4 is a stantdart setup 255 rear is more like a staggered
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Last edited by champaign777; 09-28-2012 at 10:54 AM.
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  #3  
Old 09-28-2012, 11:20 AM
aioros aioros is online now
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There are no issues. It's just a different set up. Most standard-factory tire/wheel set ups for the e39 are 235/45R17 (non M cars). But some have the staggered set up from the factory with 235/45R17 fronts and 255/40R17 rears.
As a matter of fact, I wanted to put 245/45R17 in all 4 corners of my ride, but went with the 235s. Next time around I will.

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  #4  
Old 09-28-2012, 11:40 AM
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Fudman Fudman is offline
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For the 530 sport package, 235/45-17 is the standard tire size on all four wheels. Changing tire size is a matter of personal taste and affects appearance as well as performance. Increasing or decreasing tire size has its tradeoffs. Increasing the tire width of the rear relative to the front (so called staggered setup) will induce greater understeer than the current same size tire on each corner. This is why Porsche 911 have staggered setups, to compensate for the oversteer that is inherent due to the rear weight bias of the rear engine design. The tradeoff is you can't rotate tires and you will lose a little (a few %) acceleration and gas mileage as larger tires weigh more. Increasing understeer on an e39 is usually not desirable as the factory already makes the car inherently understeer for safety reasons. Better to go straight off the road facing forward than to go off the road ass backwards in an uncontrolled spin. Most folks prefer a neutral balance, so they add a larger rear sway bar to induce greater oversteer. Unless you know exactly what you want to achieve with your car and how to achieve it using aftermarket parts, I would suggest leaving your wheels/tires and suspension bone stock and investing in driving lessons.
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  #5  
Old 09-28-2012, 12:24 PM
Newbie528 Newbie528 is offline
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Quote:
Originally Posted by aioros View Post
As a matter of fact, I wanted to put 245/45R17 in all 4 corners of my ride, but went with the 235s. Next time around I will.

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How are 235's working for you? Is it on the standard 245 sport pkg rims for 530i)? Those would be a little skinny and hard to get on the rim. Not sure why you'd do that, unless got a great deal on the tires...



To answer the OP - I've got the same car and I have 245's on all 4's. I believe to have the 255 (as you mentioned), your car would have to come equiped with wider rims to accomodate the extra width of the tire. If that's the case, by all means get the wider tires. But I wouldn't put 255/40 - they are close to the diameter of the 245 - but you won't get that exact handling the car is made for. And here's the bonue - you can rotate the tires often to increase the life of tires, and they are cheaper than the 255's. Make sure all 4 rims are same size or not; get it checked out by a tire shop for free! (I'm sure someone can correct me on this if I'm wrong. But that's basically how it works).

Last edited by Newbie528; 09-28-2012 at 12:32 PM.
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  #6  
Old 09-28-2012, 01:53 PM
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Fudman Fudman is offline
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Quote:
Originally Posted by Newbie528 View Post
How are 235's working for you? Is it on the standard 245 sport pkg rims for 530i)? Those would be a little skinny and hard to get on the rim. Not sure why you'd do that, unless got a great deal on the tires...

To answer the OP - I've got the same car and I have 245's on all 4's.


235/45-17 are the standard size tires on a 530 sport pkg. 245s are NOT standard. Anyone who has 245s on their car had them put on AFTER purchase. And wheel width are measured in INCHES, not mm. Tire width is given in mm. And the 235s fit the OEM wheels just fine.
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  #7  
Old 09-28-2012, 02:55 PM
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seemyad seemyad is online now
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I have 235/45ZR17 on all four tires. Purchased new set one year ago.

I drive the 530i with Sports Package

Last edited by seemyad; 09-28-2012 at 04:37 PM.
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  #8  
Old 09-28-2012, 03:54 PM
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tmvE39/E53/Z32 tmvE39/E53/Z32 is offline
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Originally Posted by Newbie528 View Post
How are 235's working for you? Is it on the standard 245 sport pkg rims for 530i)? Those would be a little skinny and hard to get on the rim. Not sure why you'd do that, unless got a great deal on the tires...
.......
235/45/17 is OEM size on sport pkg 525i, 530i
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Last edited by tmvE39/E53/Z32; 09-28-2012 at 03:57 PM.
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  #9  
Old 04-18-2015, 10:49 AM
RaleighDodger RaleighDodger is offline
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E39 525i Sport Tire Options

My daughter recently purchased a 2003 E39 525i Sport. We are going to need to replace the tires by summer. She said last night that she did not want the "low profile" tires next time. Currently she has the standard 235/45R17 tires. It is a daily driver for a mom around town; no high performance requirements. Any suggestions?
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  #10  
Old 04-18-2015, 11:00 AM
Wgosma Wgosma is offline
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For the 525i unless you move to smaller diameter wheel you really need to stay with 235/45 to retain proper rolling diameter. Lots of good tires, I run Yoko YK580's all season tire on my 528i....225/55/16- good wearing tire with good grip and smooth quiet ride.
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  #11  
Old 04-18-2015, 11:30 AM
RaleighDodger RaleighDodger is offline
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We are not interested in changing the wheels ..... just interested in increasing the Aspect ratio (to minimize the "low profile" appearance.
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  #12  
Old 04-18-2015, 12:00 PM
mss1 mss1 is offline
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255 40 17 should be just fine in the rear and 245 40 17 up front works too. I personally like the stagger look on bimmers 40's it's not a bad tired not a very low or high profile...
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  #13  
Old 04-18-2015, 12:02 PM
EconoBox EconoBox is offline
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MY 530i sport package came with 235-45-17
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  #14  
Old 04-18-2015, 01:10 PM
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Fudman Fudman is offline
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Sounds like you want to increase sidewall height to improve ride quality and gas mileage.
The standard 235/45 tire have a sidewall of 105.75 mm.
245/40 have a sidewall of 980 mm, so that will not accomplish what your are seeking.
255/45 have a sidewall of 114.75 mm, so that will accomplish what your are seeking but you risk tire rubbing with the fender.
245/45 are also an option. Thy have a sidewall of 110 but may risk tire rubbing with the fender.

255/40 is the largest size recommended by BMW for the 17" Style 42 8" wide wheel and has a sidewall of 102mm so that is the best option for your needs with the lowest risk.

Last edited by Fudman; 04-18-2015 at 01:13 PM.
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  #15  
Old 04-18-2015, 01:27 PM
RaleighDodger RaleighDodger is offline
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Thank you Fudman ... you comments suggest anything wider than 235 brings risk of rubbing the fenders. Is there anything O.k. going the other way,i.e., keeping the width (235) and increasing the Aspect ratio? .... 235/50? 55? 60?R17 = 117.5? 129.25? etc
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  #16  
Old 04-18-2015, 04:10 PM
Wgosma Wgosma is offline
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Quote:
Originally Posted by RaleighDodger View Post
Thank you Fudman ... you comments suggest anything wider than 235 brings risk of rubbing the fenders. Is there anything O.k. going the other way,i.e., keeping the width (235) and increasing the Aspect ratio? .... 235/50? 55? 60?R17 = 117.5? 129.25? etc
If you ARE seeking improved ride quality and better tire life I'd suggest you speak to a tire store or consult the TireRack website about a tire that will help in this area..... AND strongly consider staying with the 235/45 setup. There is a LOT of difference in ride quality/tire life depending upon the manufacturer and type of tire (summer, all season, etc.). This will most likely get you closer to the two factors I've mentioned if you're sticking with the 17' wheels.

If the car has the same wheel width on all 4 corners you can run same tire size all around and rotate the tires front/rear- in doing so you will see significant increase in tire life; you just need to rotate at frequent/regular intervals of about 5K-7K miles to insure you wear all 4 tires with basically the same 'pattern'; these car's have a good deal of negative rear camber (compared the fronts), therefore the wear pattern differs front to rear....much more so than on most other mid-sized sedans.

Good Luck/Bill
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  #17  
Old 04-19-2015, 06:43 AM
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Fudman Fudman is offline
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Quote:
Originally Posted by RaleighDodger View Post
Thank you Fudman ... you comments suggest anything wider than 235 brings risk of rubbing the fenders. Is there anything O.k. going the other way,i.e., keeping the width (235) and increasing the Aspect ratio? .... 235/50? 55? 60?R17 = 117.5? 129.25? etc
You can go narrower. However, the BMW recommendations suggest that the 105.75mm sidewall (when using a 235mm wide tire) is the maximum allowable sidewall with the original Style 42 wheels to avoid rubbing. If you are seeking an improvement in ride quality, do what Bill suggests and search the Tire Rack website for tires that have good ride quality. While physically the same size, all 235/45 tires have different sidewall characteristics that affect handling and ride qualities, as well as steering feedback and road noise. While you typically sacrifice some handling and steering qualities, you can significantly improve ride quality by your tire selection. Protection against pothole damage is another issue entirely. For that, get an SUV.
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