installed 19" & 20" rims on E60
07-28-2010, 05:59 AM
#13
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My Ride: Jan 2006 E63 650i Sport
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Sport version (includes: sport-seats, sport-suspension, M-Sport steering wheel, Anthracite headliner, Shaddow Line), Saphire Black, Black Dakota Leather, Anthracite Maple Wood trim, Steptronic Auto, Xenons, NAV-Professional with Voice Control, TV, CD-Changer, Bluetooth, Logic7, Head-up Display, Comfort Access, Seat Heating front, Auto Dimming & Folding Mirrors, Extended Auto Air Conditioning, PDC.
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Mods:
Spacers 5mm front & 15mm rear
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Wheels:
20" Alpina Softline (Classic) with Dunlop Sport Maxx non-RFT (255/35/20 & 285/30/20)
From an overall wheel (rim+tyre) perspective there is only a difference of 5mm / 0.2" between the 19" and 20" wheels the OP listed.
That's less than the difference between my 255/30/R20 and 285/25/R20, which is 12mm / 0.5", and that runs fine.
As for looks, correct hub fit or why 2 different rim sizes, that's a different matter!
That's less than the difference between my 255/30/R20 and 285/25/R20, which is 12mm / 0.5", and that runs fine.
As for looks, correct hub fit or why 2 different rim sizes, that's a different matter!
07-28-2010, 06:36 AM
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My Ride: 2007 530i. Purchased 6/28/07. Titanium Silver Metallic, Black Dakota Leather, Dark Poplar Trim, Steptronic, Premium Package, Cold Weather Package, Bluetooth, Adaptive Control Xenons. 10/30/07 Added OEM 124s with 245/40/18 & 275/35/18 Michelin Pilot Sport A/S tires. Installed red Cal Covers� from BavAuto. 11/21/07 Added OEM all-weather floor mats (for winter, carpet in summer) and coat rack. 6/26/08 installed M5-style rear spoiler. 6/30/08 put on red reflectors. 8/22/08 Euro turn signal stickers applied. 3/20/09 Installed Shadowline Trim. 3/27/09 Added Matte Black Kidney Grilles from Trinity. 4/03/09 Installed Bimmian Shadow Matte Black 530i Badges. 4/04/09 Installed LED license plate lights from Trinity. 5/01/09 Installed Brabus Interior LED Kit and White Angel Eyes. 5/02/09 Put in Brabus 6K Fogs. 5/14/09 Removed charcoal filter. 5/15/09 Installed light smoke LED side marker lamps from Trinity. 5/21/09 Sprint Booster. 6/12/09 Painted exhaust tips flat black. 6/13/09 Pulled red Cal Covers and painted calipers low gloss black. 6/27/09 RPI Ram Air Scoop from Trinity. 8/15/09 Installed Brabus's silver invisibulbs front and rear. 9/24/09 Installed R-Dash license plate LEDs from Brabaus (John).
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07-28-2010, 08:44 AM
#15
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My Ride: Bmw 530d 2004
xBMWx: It does make an 1 inch difference in overall diameter between his front and rear wheels and tyres with the tyre sizes he mentioned.
245/35 R19
285/30 R20
245/35 R19
285/30 R20
07-28-2010, 10:21 AM
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Which brand tires do you have?
Some of the cheaper tires aren't actually always 100% round. On my car I just put on a set of cheapish tires, noticed some vibration and went back to the tire shop. Watched as they rebalanced the wheels and noticed that the front tires wasn't circular when rotating!!! (Tire shop guy noticed it as well). It wasn't very much and it's hardly noticeable during driving but it actually is quite noticeable during braking at certain speeds.
Check that your rims are centered correctly on the hub and then check if tires are circular... !
Some of the cheaper tires aren't actually always 100% round. On my car I just put on a set of cheapish tires, noticed some vibration and went back to the tire shop. Watched as they rebalanced the wheels and noticed that the front tires wasn't circular when rotating!!! (Tire shop guy noticed it as well). It wasn't very much and it's hardly noticeable during driving but it actually is quite noticeable during braking at certain speeds.
Check that your rims are centered correctly on the hub and then check if tires are circular... !
07-29-2010, 12:34 AM
#17
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My Ride: Jan 2006 E63 650i Sport
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Options:
Sport version (includes: sport-seats, sport-suspension, M-Sport steering wheel, Anthracite headliner, Shaddow Line), Saphire Black, Black Dakota Leather, Anthracite Maple Wood trim, Steptronic Auto, Xenons, NAV-Professional with Voice Control, TV, CD-Changer, Bluetooth, Logic7, Head-up Display, Comfort Access, Seat Heating front, Auto Dimming & Folding Mirrors, Extended Auto Air Conditioning, PDC.
.
Mods:
Spacers 5mm front & 15mm rear
.
Wheels:
20" Alpina Softline (Classic) with Dunlop Sport Maxx non-RFT (255/35/20 & 285/30/20)
In my haste I took details from the wrong post and thought it was a 285/25/20 and not a 285/30/20.
Apologies for any confusion caused. You are right, its 1 inch difference with that size tyre.
07-29-2010, 05:08 AM
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My Ride: 2008 BMW 528i
Please post some picture of your car after you have corrected the problem. I am interested to see how it looks. I have a staggered 19" setup on my car and a couple of people have commented on how the rear wheel looks a little small.
07-29-2010, 06:36 AM
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My Ride: 2008 550i M-sport, retrofitted heated M-sport steering wheel with paddles, Sport-auto transmission
On a rear wheel drive car-its fine to have bigger diameter in the rear however the car has to be setup to do so-I dont think that is the cauzse of your problems you describe-however a different set of problems like severe handling problems with that setup since none of the other suspension is set up for that difference in diameter.
In the OP's setup, with larger overall wheel/tire diameters in the rear the car's sensors will read that the front wheels are turning faster than the rears (which should almost never happen unless you are losing traction while braking!?) and attempting to apply ABS to the affected wheels to bring your car out of the loss of traction it "thinks" you are in. At slower speeds, if my logic holds (and I'm by no means an expert with our traction control system's overall workings), the relative speed difference would be small and within acceptible tolerances of the system, but at higher speeds you exceed the threshold and the traction control kicks in.
OP - try disbling your traction control system and seeing if this removes the issue... (do a search, but iirc this involves holding down the DTC button for 5 seconds or something like that). If it does, then you should seriously consider changing your setup to one with identical or near-identical overall wheel diameters.
Let us know how it turns out....
07-29-2010, 10:02 AM
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My Ride: Bmw 530d 2004
I disagree that it's "fine" to have bigger overall diameter in the rear for RWD cars, at least on most modern cars, as this would confuse the heck out of the traction control... if you think about it, the car's electronics are monitoring wheel speeds and generally expecting them to be roughly the same (allowing for differences while turning, etc.).
In the OP's setup, with larger overall wheel/tire diameters in the rear the car's sensors will read that the front wheels are turning faster than the rears (which should almost never happen unless you are losing traction while braking!?) and attempting to apply ABS to the affected wheels to bring your car out of the loss of traction it "thinks" you are in. At slower speeds, if my logic holds (and I'm by no means an expert with our traction control system's overall workings), the relative speed difference would be small and within acceptible tolerances of the system, but at higher speeds you exceed the threshold and the traction control kicks in.
OP - try disbling your traction control system and seeing if this removes the issue... (do a search, but iirc this involves holding down the DTC button for 5 seconds or something like that). If it does, then you should seriously consider changing your setup to one with identical or near-identical overall wheel diameters.
Let us know how it turns out....
In the OP's setup, with larger overall wheel/tire diameters in the rear the car's sensors will read that the front wheels are turning faster than the rears (which should almost never happen unless you are losing traction while braking!?) and attempting to apply ABS to the affected wheels to bring your car out of the loss of traction it "thinks" you are in. At slower speeds, if my logic holds (and I'm by no means an expert with our traction control system's overall workings), the relative speed difference would be small and within acceptible tolerances of the system, but at higher speeds you exceed the threshold and the traction control kicks in.
OP - try disbling your traction control system and seeing if this removes the issue... (do a search, but iirc this involves holding down the DTC button for 5 seconds or something like that). If it does, then you should seriously consider changing your setup to one with identical or near-identical overall wheel diameters.
Let us know how it turns out....
Good advice and thoughts.
- Antti -
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