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

I wouldn't do 225/50 on a 17"... too tall for your car. Do 205/50 or 225/45.

I think 225/45/17s. Does the offset seem ok?

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.

Is the bolt pattern and center bore size the same? I thought something was different between the 5 and 3.

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.

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.

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.

Worst case scenario, you can run a little bit of a spacer. I suspect that you will be fine with narrow wheels and winter tires. There is a big difference between clearing ALL 225 tires and clearing 225 winters.

205/45-17 is completely wrong as is 225/50-17. 205/50-17 would be acceptable, but 225/45-17 would be better.

I ran 225/45-17 all-seasons on my e90xi. Then I had 225/45-17 winters front and rear for the e90i rwd... Best size winters for that car.

What is the e60 wheel offset that you have? I'm almost sure it will work before seeing the number, but I couldn't pick it out of your first message.