Tire size 245 45 17 VS 245 40 17

[agtur2001]

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!

[playz]

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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[agtur2001]

Thank you Playz for the reply. Much appreciated! Alex

[///M Power]

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.

[agtur2001]

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.

[AlpineSixAndSeven]

Originally Posted by ///M Power

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?