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Balto
Extreme Veteran
Date registered: Mar 2012
Location: Scottsdale, AZ
Vehicle(s): 2002 G500
Posts: 368
| RE: 463 with larger tires - ESP problems solved
4x4abc - 10/13/2014 6:57 AM
any tire larger or smaller than 265/60R18 will affect ESP
as long as the replacement tires have about 675 revs per mile or 2367 mm circumference in their spec sheets, they are safe to use
Thank you |
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Balto
Extreme Veteran
Date registered: Mar 2012
Location: Scottsdale, AZ
Vehicle(s): 2002 G500
Posts: 368
| RE: 463 with larger tires - ESP problems solved
4x4abc - 10/13/2014 6:57 AM
any tire larger or smaller than 265/60R18 will affect ESP
as long as the replacement tires have about 675 revs per mile or 2367 mm circumference in their spec sheets, they are safe to use
Also,
You mention earlier that with adjusting your computers that +10% MPG was achieved? I'm guessing this is only because you lost MPG after the tire size switch and more or less went back to the MPG that you got with factory sized tires?
Do you happen to know what the max size we can get under our G without modification to the fenders/anything else and only have to get the computers adjusted? Guessing 33's and maybe "some" 34's?
Thank you |
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4x4abc
Date registered: Apr 2006
Location: La Paz, Baja California, Mexico
Vehicle(s): 02 G500
| RE: 463 with larger tires - ESP problems solved
the size I am using currently, 295/75R16, rubbed in the upper rear fender wells
used spring spacers to remedy that
used the same spacers also for the front to keep the vehicle balanced
in the front the tires rub on the leading arms and on the steering box pitman arm
only wheel spacers (or a different ET) will cure that
I decided against it and therefore have to avoid hard left or right |
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traveller09
Member
Date registered: Feb 2012
Location: Renton, WA
Vehicle(s): 95 911, 08 Volvo S60 T5, 2005 G500
Posts: 29
| RE: 463 with larger tires - ESP problems solved
Hi guys, My rig is in the shop overnight and my MB dealer is willing to make the changes to the computer for me, but they are at a loss as to what to change the settings to. I went with Duratrac 275/70 R18 and of course there is no tire setting for that size. I searched the forum and this tread seemed to fit the bill. I believe I now have 33's on there? Which would indicate a transmission setting of 4.857? What tire sized settings do I use for the odometer change, or keep it stock? Is it ok if they only change the transmission setting without the odometer changing?
Thanks in advance. David From Haralds post: 5.286 gears would accomodate 35" to 36+" tires (U=2790 to 2870 mm)
4.857 gears would accomodate 32" to 33+" tires (U=2550 to 2630 mm)
stock 4.375 gears shoul be good up to 31+" tires (U=2360 to 2470 mm)
stock:
265/60R18, U=2367 mm, 29.66"
265/70R16, U=2357 mm, 29.54"
235/85R16, U=2442 mm, 30.60" -
255/85R16, U=2545 mm, 31.89" - 7.5% loss
265/75R16, U=2450 mm, 30.80" -
275/70R16, U=2416 mm, 30.28" -
285/75R16, U=2545 mm, 31.89" - 7.5% loss
295/75R16, U=2590 mm, 32.46" - 10% loss
305/70R16, U=2540 mm, 31.83" - 7% loss
305/75R16, U=2681 mm, 33.60" - 13% loss
stock diffs 4.375:1
optional 4.857:1 = 11% gain
optional 5.286:1 = 20% gain
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thebigblue
Date registered: Jan 2012
Location:
Vehicle(s):
| RE: 463 with larger tires - ESP problems solved
I´m on 285/65-18 and did not change anything, the speedometer is around 10% too low from factory, mine now is a few % below correct speed. Since the odometer is not 10% above from factory, I just know that my figures will be 10% to high, so I subtract 10% from fuel consumption etc.
But it looks like the 4.857 setting will get things back to "normal" 
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Balto
Extreme Veteran
Date registered: Mar 2012
Location: Scottsdale, AZ
Vehicle(s): 2002 G500
Posts: 368
| Re: 463 with larger tires - ESP problems solved
Just went with a set of 265/70R18 BFG KO2s and am going to take the G into my shop to get the calibration adjusted.
Anyone have tips on what to tell them the settings should be? Thanks |
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kotton
Regular
Date registered: Sep 2014
Location: California, Orange County
Vehicle(s): 2006 G-500
Posts: 84
| Re: 463 with larger tires - ESP problems solved
Balto - 12/2/2015 7:13 PM
Just went with a set of 265/70R18 BFG KO2s and am going to take the G into my shop to get the calibration adjusted.
Anyone have tips on what to tell them the settings should be? Thanks
I just got the same tire mounted Monday but in 275/70/R18 with no rubbing on a stock G500 BTW for anyone reading this in the future. The way I've read through this thread is the new tire is 33.2" tall compared to the stock size of 30.5". Since 33.2 is 8.14% taller than the stock size I would have to look for some combo in the system close to that, which would either be 4.111 gears(+6.04%) plus 235/75/R17.5 (+2.87%) = 8.91% of total correction. Or not touching the gears and just selecting the 8.25R16C tire option, but im not exactly sure how to read that type of numeric sizing. From using my google fu it looks like its a around a 33" tire but I dont know for sure as some guys on the defender forums claim its a 34" tire.
Balto in your case I would just have your shop choose the 4.111 gears which is a 6.04% increase that matches your 6.16% taller tires pretty well.
Edited by kotton 12/2/2015 3:05 PM
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TD1
Member
Date registered: Apr 2015
Location: Brooklyn, NY
Vehicle(s): 2004 G500 // 97 Disco
Posts: 22
| Re: 463 with larger tires - ESP problems solved
Kotton- on those tires i rubbed at full right turn lock on the metal right next to the steering box. |
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kotton
Regular
Date registered: Sep 2014
Location: California, Orange County
Vehicle(s): 2006 G-500
Posts: 84
| Re: 463 with larger tires - ESP problems solved
TD1 - 12/3/2015 1:52 PM
Kotton- on those tires i rubbed at full right turn lock on the metal right next to the steering box.
Its real close, but I have a good 1/4" to 1/2" of clearance at full lock. Its hard to snap a pic, but this at least shows the pitman arm clearance.
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Balto
Extreme Veteran
Date registered: Mar 2012
Location: Scottsdale, AZ
Vehicle(s): 2002 G500
Posts: 368
| Re: 463 with larger tires - ESP problems solved
Thanks man! That's exactly what I needed! |
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kotton
Regular
Date registered: Sep 2014
Location: California, Orange County
Vehicle(s): 2006 G-500
Posts: 84
| Re: 463 with larger tires - ESP problems solved
Balto - 12/4/2015 1:34 PM
Thanks man! That's exactly what I needed!
I should say thats only if you have the normal 4.375 gears installed, so you should double check that when you go in. |
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512bbi
Expert
Date registered: Jan 2007
Location: North western US and Europe
Vehicle(s): 05G55kge,Range rover classic,clk55amg,ML 430
Posts: 1313
| RE: 463 with larger tires - ESP problems solved
When I installed 10% higher profile tires on my g55k soon after I got it I experienced a noticeable difference on how much more lazy the esp had become if I provoked oversteer or understeer on a loose surface.
Most of all, my electronic traction control (ETC) became a lot worse than stock size tires.
When I adjusted the settings at an MB shop everything got a little better, but when later I purchased a star diagnosis system I had my mechanic adjust the settings to the max for the largest possible tires and the transmission module for the largest tire setting possible.
Right away my esp went to almost better mode than stock and so did the ETC which now was working again at full flex and loose traction situations that I needed the lockers before
I am sorry is too many years and I do not remember the numbers on the settings but I do remember if I went to the setting on trasmission module as if running largest possible tire like 35s so the trasmission module was adjusted for the tallest gears possible.
With a diameter of 32.7 inches I do not touch anywhere with the stock amg wheels and 286-65-18s.
I find that size ideal as I get full flex and steering with out the issues of only an additional third of an inch of rubber, and perfect function of electronics with esp and etc
The e load rating revo 2s ride smooth,soft and handle on both pavement and all types of dirt ,rocks,snow ,ice and more with out any flats or balancing issues
Set your speedo for 33s and your transmission module to the highest setting....it worked for me good enough I can slam corners at 75 and esp works fast and perfect as stock
Mario |
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kotton
Regular
Date registered: Sep 2014
Location: California, Orange County
Vehicle(s): 2006 G-500
Posts: 84
| RE: 463 with larger tires - ESP problems solved
512bbi - 12/5/2015 3:34 AM
When I installed 10% higher profile tires on my g55k soon after I got it I experienced a noticeable difference on how much more lazy the esp had become if I provoked oversteer or understeer on a loose surface.
Most of all, my electronic traction control (ETC) became a lot worse than stock size tires.
When I adjusted the settings at an MB shop everything got a little better, but when later I purchased a star diagnosis system I had my mechanic adjust the settings to the max for the largest possible tires and the transmission module for the largest tire setting possible.
Right away my esp went to almost better mode than stock and so did the ETC which now was working again at full flex and loose traction situations that I needed the lockers before
I am sorry is too many years and I do not remember the numbers on the settings but I do remember if I went to the setting on trasmission module as if running largest possible tire like 35s so the trasmission module was adjusted for the tallest gears possible.
With a diameter of 32.7 inches I do not touch anywhere with the stock amg wheels and 286-65-18s.
I find that size ideal as I get full flex and steering with out the issues of only an additional third of an inch of rubber, and perfect function of electronics with esp and etc
The e load rating revo 2s ride smooth,soft and handle on both pavement and all types of dirt ,rocks,snow ,ice and more with out any flats or balancing issues
Set your speedo for 33s and your transmission module to the highest setting....it worked for me good enough I can slam corners at 75 and esp works fast and perfect as stock
Mario
Where did you purchase your STAR system from? |
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512bbi
Expert
Date registered: Jan 2007
Location: North western US and Europe
Vehicle(s): 05G55kge,Range rover classic,clk55amg,ML 430
Posts: 1313
| RE: 463 with larger tires - ESP problems solved
I have to look it up I do not remember their name
It was from England with all the trimmings and it was not cheap
Moderator G AMG gave me his blessing on it since I did not know who is what on this subject and my mechanic had no issues with it.
I would ask him if you want an opinion you can count on
Mario |
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kotton
Regular
Date registered: Sep 2014
Location: California, Orange County
Vehicle(s): 2006 G-500
Posts: 84
| Re: 463 with larger tires - ESP problems solved
Thanks for the info 512.
Does anyone remember where I need to go in order to change the speedometer settings to a larger tire size? Some threads I dug up in other forums suggest its in the NAV settings on the comand unit, but I'm unsure if that updates the speedometer or just the GPS unit.
I'm taking out the comand soon anyway to install a new head unit, so I assume I'll have to set the speedometer another way anyway. |
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512bbi
Expert
Date registered: Jan 2007
Location: North western US and Europe
Vehicle(s): 05G55kge,Range rover classic,clk55amg,ML 430
Posts: 1313
| RE: 463 with larger tires - ESP problems solved
I am nor sure since it has been years but I do remember that where the tire sizes where in there to choose from the largest diameter was a metric tire that would equal a 33 inch one,but setting the tire diameter would fix the speedo but will have no effect on the function of the esp and traction control.
The transmission module section that lists different gear settings was the one that effected the function of electronics
I do not know if they connect in function or not but when I changed the tire size only first the speedo worked accurately tested by GPS but that by it self had no effect on the workings of esp, when later we changed the settings on transmission module it all worked fine
Mario |
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8899
Member
Date registered: Jan 2017
Location: Northern Virginia
Vehicle(s): 1994 E500; 2003 W210 4Matic Wagon; 2008 G55
Posts: 14
| Re: 463 with larger tires - ESP problems solved
I recently exchanged some emails with Darren at Collie regarding tire size options for my 2008 G55. He indicates that adjustment of tire size programming in STAR is not possible as it is "scn" coded and therefore to not change tire size beyond stock. This is unfortunate news since the stock tire size options are slim pickings. Has anyone else with a 2008 G55 been successful in moving to a 31" or 32" tire size??? |
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thebigblue
Date registered: Jan 2012
Location:
Vehicle(s):
| Re: 463 with larger tires - ESP problems solved
I have moved from stock to 33" (285/65-18) with no issues. I have a 2005 that also don´t have the option to change tire-size in the settings. |
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8899
Member
Date registered: Jan 2017
Location: Northern Virginia
Vehicle(s): 1994 E500; 2003 W210 4Matic Wagon; 2008 G55
Posts: 14
| Re: 463 with larger tires - ESP problems solved
Just to update....I went ahead and bought a set of the stock G500 wheels (18" x 7.5" ET 43) and instead of mounting the stock tire size (265/60; 30"), I mounted 275/60 (31") Yokohama GEO AT G015 tires. No problems with ESP. First impression is that the tires are great...very quiet considering the AT tread design. I will run them until the spring at which time I will remount the stock G55 wheels and tires. |
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Jesse
Member
Date registered: Aug 2017
Location: Massachusetts
Vehicle(s): 2005 G55
Posts: 9
| Re: 463 with larger tires - ESP problems solved
I know this thread is quite old, but the information is EXTREMELY helpful. Thank you to all those who contributed to the content. I am posting my experiences here in case it is useful to others.
My vehicle is a 2005 G55 with stock suspension (as far as I know)
I installed BFG AT KO2 265/70-18 tires on OEM G550 18" wheels. There no rubbing issues in normal driving lock to lock. I have done a few days of mild off roading (Class 4 roads in Vermont) and have not had any contact issues there either.
My speedo was off and the truck was not shifting when it should. The most noticeable shifting issue was not downshifting when needed on long steady hills. So, with the help of this thread, I decided to make a few edits to the settings.
My axle ratio was set to 4.111 and tire size was set to 265/60R18. When I compared the tire sizes, I needed to increase the tire size by roughly 10%. Unfortunately, in my 2005 G55, there were only a couple tire options. I decided on the following changes.
In the VG (Transfer Case) section, under Read Coding and Change if Necessary, I set the tire size to 235/85R16 and the Axle Ratio to 4.375. That works out to be almost exactly 10%. I also set the tire size under Special Equipment in the Instrument Cluster section to the same 235/85R16 in order to fix the speedo.
The speedo is now very close. It reads ~1MPH low at 65MPH. The shifting is now much smoother when accelerating and downshifts on the hills where I was manually downshifting in the past is very smooth. Acceleration also feels faster, although that could be mental.
Thanks again for all those who have posted in this thread and especially to Harald and Karl for the screen shots and clarifying details that helped me figure this out.
Thanks,
- Jesse
Edited by Jesse 1/3/2018 4:03 PM
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