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Wheels and Tires Discussion of different brands of tires, sizes and wheels.

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Old 08-18-2014, 11:28 PM   #1
austinindian
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Default Specs needed for 5 spoke alloys, active sport 98

A few years back I swapped out my original alloy wheels with larger diameter M sport wheels from a 1995 M3. They look fantastic but unfortunately I believe the quality of the ride has suffered. I now want to suck up this decision and return to the original wheel spec. Does anyone know where I can get the specific info for those wheels. I'm pretty sure they were 7.5 x 15. If I find wheels with that spec, what about the offset of the 5 lug nut holes? Is there a measurement out there so I can compare with similar wheels?
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Old 08-19-2014, 11:46 AM   #2
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The originals are BMW Style 18, 15x7" with an offset of ET47. There was also a 16x7" version that came on sport model 318tis. That might be a decent compromise between the 15 and 17" M wheels.

http://felgenkatalog.auto-treff.com/?felge=180
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Old 08-20-2014, 05:52 PM   #3
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Thank you so much for the info. Would that ET47 offset spec on any 15x7 five lug bmw wheel work for me? I found this set and was considering it. It's from a 3 series e46 it seems.

http://austin.craigslist.org/pts/4606429561.html

Based on that website I would need an offset of ET46. I'm also not clear on what thickness of tire I should use on my 318ti, but I'll look at the tire info sticker on the door jam to see if anything is listed.
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Old 08-20-2014, 06:58 PM   #4
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The offset isn't set in stone, anything from ET40 to ET47 is going to be fine. The higher the offset number the farther in the wheels will sit.

Stock 15" tire size is typically 205/60-15. When you start trying to fit wide rubber on the car it becomes crucial to know the offset and clearances inboard and outboard of the wheel.
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