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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 04-19-2008, 06:07 PM   #1 (permalink)
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Tire size 245 45 17 VS 245 40 17

I have a 1994 325ic with M3 staggered rims. I need to replace my 245 40 17 rear tires which I have always noticed looked smaller but wider than my front. which are 45/17.

Now that I need to replace, can I use 245 45 17 instead of 245 40 17?

Thanks!

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Old 04-20-2008, 07:45 AM   #2 (permalink)
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40's will give you spedo a correct reading, 45 will throw it out a few kp/h

Work it out off your original tyre/wheel size....
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Old 04-20-2008, 11:49 AM   #3 (permalink)
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Thank you Playz for the reply. Much appreciated! Alex
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Old 04-20-2008, 12:36 PM   #4 (permalink)
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Rotate your 45/17 to the rear, adn put the 40/17 on the front. Then once you are through the 45/17 switch them out to 40/17's. That's the best and most economical way to go about this situation.
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Old 04-22-2008, 03:57 PM   #5 (permalink)
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Quick Update incase anyone ever ask the same question in the future.

Original setup: 225/45/17 front. 245/40/17 Rear. M3 Staggered Rims.

New/Current setup: 225/45/17 front. 245/45/17 Rear. M3 Saggered Rims.

Results: Car looks great! BUT... but rear passenger side tire scrapes the wheel well on large bumps or steep driveways.
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Old 04-22-2008, 06:19 PM   #6 (permalink)
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Rotate your 45/17 to the rear, adn put the 40/17 on the front. Then once you are through the 45/17 switch them out to 40/17's. That's the best and most economical way to go about this situation.
just so you know the rim's are staggered....

Glad to here you got it resolved...have you rolled your fenders?
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