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09-16-2012, 01:46 PM | #1 |
dogged
Join Date: Dec 2003
Carmudgeonly Ride: '22 M440 xDrive GC
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Fitment advice from the experts
My e91 runs 17-inch staggered wheels: 225/45/17s on rims 7x8 ET34 front and 245/40/17 17x8.5 ET39 rear.
From running the calculators, it looks like the e61 rims will work: 17x7.5. Figuring 205/45/17 winter tires. Or 225/45/17s. Or 50s in either. Looks like 45s lower about .5 inches and 50s raise by a similar amount in the 205s. Can anyone please confirm? Many Thanks! PS: Best I can do below with posting calculator results. Looks like the biggest difference is for the rear. FRONT: Wheels: Wheel 1 Wheel 2 Wheel size 17x8 ET 34 17x7.5 ET 43 BackSpace 148 mm (5.8'') 151 mm (5.9'') 3 mm (0.1'') deeper. Rim Lip 15 mm (0.6'') wider Typical Weight ~ 24 lbs / 11 kg ~ 22 lbs / 10 kg Tires: Tire 1 Tire 2 Tire size 225/45-17 205/50-17 Section width 225 mm (8.9'') 205 mm (8.1'') Sidewall 101 mm (4'') 103 mm (4.1'') Tire diameter 634 mm (25'') 638 mm (25.1'') 4 mm (0.6%) taller. Rim sizes 17x6.5 to 17x8.5 17x5.5 to 17x7.5 Circumference 1991 mm (78.4'') 2003 mm (78.9'') Revs per mile 808.4 803.3 Typical Weight ~ 22 lbs / 10 kg ~ 21 lbs / 10 kg Wheel+Tire Weight ~ 46 lbs / 21 kg ~ 43 lbs / 20 kg REAR: Wheels: Wheel 1 Wheel 2 Wheel size 17x8.5 ET 34 17x7.5 ET 43 BackSpace 154 mm (6.1'') 151 mm (5.9'') 4 mm (0.2'') shorter. Rim Lip 22 mm (0.9'') wider Typical Weight ~ 25 lbs / 11 kg ~ 22 lbs / 10 kg Tires: Tire 1 Tire 2 Tire size 245/40-17 205/50-17 Section width 245 mm (9.6'') 205 mm (8.1'') Sidewall 98 mm (3.9'') 103 mm (4.1'') Tire diameter 628 mm (24.7'') 638 mm (25.1'') 10 mm (1.6%) taller. Rim sizes 17x7 to 17x9 17x5.5 to 17x7.5 Circumference 1972 mm (77.6'') 2003 mm (78.9'') Revs per mile 816.1 803.3 Typical Weight ~ 23 lbs / 10 kg ~ 21 lbs / 10 kg Wheel+Tire Weight ~ 48 lbs / 21 kg ~ 43 lbs / 20 kg |
09-16-2012, 01:59 PM | #2 |
I like BMWs
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I wouldn't do 225/50 on a 17"... too tall for your car. Do 205/50 or 225/45.
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09-16-2012, 02:01 PM | #3 |
dogged
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I think 225/45/17s. Does the offset seem ok?
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09-16-2012, 06:54 PM | #4 |
lawn boy
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09-16-2012, 07:03 PM | #5 |
Relic
Join Date: Oct 2003
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The E39 has a special center bore of 74.1. IIRC, they decided that was a stupid idea and didn't do it to any other cars.
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09-16-2012, 08:20 PM | #6 |
dogged
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Bolt pattern and center bore are the same. Found some fitment website though that says the maximum offset for the e90 is 40. The e61 wheels are 43... Sigh.
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09-16-2012, 10:13 PM | #7 |
lawn boy
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09-16-2012, 02:41 PM | #8 |
I like BMWs
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I have 225/45 that I use in the winter and they work really well while still retaining decent handling characteristics.
Not sure about the offset on a E60 wheel, I didn't get into those numbers on your original post. Let me check it out.
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09-17-2012, 11:22 AM | #9 |
dogged
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What winter tires do you have?
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09-16-2012, 07:01 PM | #10 |
195
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The e39 had a different center bore, but the e60 and e90 are the same. Same bolt pattern, too.
The AWD e60s have a very similar (the same?) offset as the e90s. |
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