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Going from stock 18s to 16s - going lightweight

8596 Views 37 Replies 10 Participants Last post by  mumixam
Philosophy behind the choices is strong and lightweight. I am looking for improved performance and comfort with the change. Looks come in last but i do like the look of bigger sidewalls and the oz wheels. I have a white m3 s-touring model for reference.


OZ Ultraleggara black 16x7 45mm offset - 14.7 lbs which isnt the lightest on tirerack but close. From what i know OZ makes some pretty high quality / strong wheels, the Kosei is lighter but the offset tucks it in more and i have read a few stories about them cracking under normal use. The RPF1s im not a fan of the look/ color available.

Was thinking of matching them to a set of 215/55r16 conti dws tires - they are 21 lbs and i think i would like to keep the same tirewidth. 205/60s dont seem to have as great of tire choices. They are slightly smaller diameter - 1.2% shorter gearing with the change, 69.2 mph actual at 70 indicated - doesnt seem bad to me. Looks like they will fit fine, not sure if scrub will be affected.

Was also thinking of picking up the Koni FSDs at the same time, or maybe slightly after to improve comfort a bit more - wasnt thinking about changing springs at all though, stock ride height is fine by me. Not sure if there is a spring setup more comfort focused - stock seems like it might be the way to go.

Feel free to leave a comment- im interested to hear thoughts or maybe other combinations i haven't thought of, i really have only been browsing tire rack because its easy and they will mount/balance for free and ship to me quickly.

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Less mass to spin up and slow down, less for the suspension to deal with also.

I know it will help keep my tires on the road and make potholes and expansion joints less jarring. The downsizing was to get bigger / softer sidewalls with the idea of smoothing the ride further.

SE Wisconsin here and our roads get fairly gnarly in winter times with frost heaves and tore up asphalt.

I'm a bit curious how much difference it will make in the comfort aspect.

Going 17s still gives a fair amount more sidewall but looks to be a better performance setup.

I wonder by how much over 16s. I think weight diff is like 1-3 lbs
I'm going 18s next year, currently got 16s about to go bald.

18s is more aesthetic and lighter ( depending on the type of wheels you have)
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