Help! New rims...Need tires
08-09-2005, 07:36 PM
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Hello, I have a 05 530i w/sport package and just aquired a set of 20x8.5 front and 20x10 rear GFG wheels. I bought them with tires 245/40 and 275/35 that came off a 745. Well the back ones look like they will rub and the front ones didn't go on at all. Tire brand are Mechelin pilot sport a/s. I have read and noted different tire sizes but still unsure. Does sport package matter on choosing tires? Brand?
08-09-2005, 11:49 PM
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My Ride: 2004 520i, mystic blue, steptronic, beige leather, pdc, bluetooth, rain sensor, BMW sport kit fitted, 18" 166 rep BMW rims , de-badged, cherished reg. chrome grill,
Originally Posted by firmsE60' date='Aug 10 2005, 04:36 AM
Hello, I have a 05 530i w/sport package and just aquired a set of 20x8.5 front and 20x10 rear GFG wheels. I bought them with tires 245/40 and 275/35 that came off a 745. Well the back ones look like they will rub and the front ones didn't go on at all. Tire brand are Mechelin pilot sport a/s. I have read and noted different tire sizes but still unsure. Does sport package matter on choosing tires? Brand?
[snapback]157727[/snapback]
Hope this helps
08-10-2005, 06:55 AM
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My Ride: (USA) 645Ci, Silver Gray, Chateau, Cold Weather PKG, Premium Sound PKG, Sport PKG, Step, NAV [Std Equip in 645], HUD, Satellite (SIRIUS) Radio, Aux Input, Bluetooth enabled using iPhone 3GS w/ adapter cradle - Build date - 01/05, Baby delivered 2/24/05
Originally Posted by firmsE60' date='Aug 9 2005, 11:36 PM
Hello, I have a 05 530i w/sport package and just aquired a set of 20x8.5 front and 20x10 rear GFG wheels. I bought them with tires 245/40 and 275/35 that came off a 745. Well the back ones look like they will rub and the front ones didn't go on at all. Tire brand are Mechelin pilot sport a/s. I have read and noted different tire sizes but still unsure. Does sport package matter on choosing tires? Brand?
[snapback]157727[/snapback]
245/40 = 25.9" diameter tire
275/35 = 25.8" "
19" Wheel
245/40 = 26.4" diameter tire
275/30 = 25.6 " diameter (no 275/25 listed)
20" wheel
245/40 = 27.9" diameter tire
275/35 = 27.6" diameter
See the problem?
Yoy are 2 inches more in tire diamter than the OEM 18 inch wheel/tire combbination. You have to step down in ratio - ie down to 30 and 25 to keep same rolling diameter if you can even find them. Maybe in between (35 and 30 to get within an inch). And as mentioned elsewhere, you need to check the offsets as 7 series and 5 series will most likely not be the same.
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