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      06-23-2020, 06:24 AM   #1
DRiFT_645
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Front Wheel Widths - 275 vs 295

Hi all,

Just ordered some new wheels for the M5. 11" wide rears, 10" wide fronts.

The shop is recommending 295's for the front... I'm reluctant to go so wide on the front.

Is there any harm in going 295 in front vs. 275?

The rears are going to be 305.

Thanks in advance!
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      06-23-2020, 07:05 AM   #2
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Unless this is going to be a track car, I don't think one would want 295s on the front. That will tramline like nobody's business.

I also have no idea how well 295s will fit on the front as far as rubbing on the fender or inside. My memory is there's a bit of chassis that sticks out that might rub at or near full lock, and if you go spacers it might rub on the fender with compression.

Last edited by vafan13; 06-23-2020 at 11:00 AM.. Reason: didn't have coffee before posting.
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      06-23-2020, 10:12 AM   #3
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Quote:
Originally Posted by vafan13 View Post
Unless this is going to be a track car, I don't think one would want 295s on the front. That will tramline like nobody's business. Additionally, 295s on a 10" rim are over recommended, and while people do it OK on the rears, I wouldn't do it on the fronts as it might make it feel a bit mushier in spirited cornering. 275s seem like the ticket.

I also have no idea how well 295s will fit on the front as far as rubbing on the fender or inside. My memory is there's a bit of chassis that sticks out that might rub at or near full lock, and if you go spacers it might rub on the fender with compression.
Thanks! Appreciate the feedback!
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      06-23-2020, 11:14 AM   #4
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Quote:
Originally Posted by DRiFT_645 View Post
Thanks! Appreciate the feedback!
No problem. Unfortunately, I realize now that I misspoke on the 10" rim width and 295. That's what our stock rears are (doh). My fault for posting before coffee was absorbed. That said, I stand by 295s being bad fronts for a non-track car for the reasons I stated, especially the tramlining.

Despite being stock on the rears, I'd argue it's not optimal for the front. Rim width vs. tire width affects how stiff the sidewall is in practice. Going for a tire that's at the high end of the range for a given width (like 295s on 10") will allow for more sidewall flex. On the rears I believe this is a worthwhile compromise*. On the fronts, though, I don't think one would want to make the trade. More pressure on the sidewalls in a turn than the rears exacerbates the added flex, and steering won't feel as crisp/responsive.

Out of curiosity, did they give any reason why they suggested 295s on the front?

*more sidewall flex = bigger contact patch on hard acceleration, though on a radial like this it will be limited.

Last edited by vafan13; 06-23-2020 at 11:19 AM..
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      06-23-2020, 03:15 PM   #5
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Good points.

They recommended 295 so the side profile matches best with the rears. I think it’s also because they couldn’t make 285 work and didn’t think to suggest 275.

When I rejected 295, they offered the option for 275.
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      06-23-2020, 08:55 PM   #6
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Quote:
Originally Posted by DRiFT_645 View Post
Good points.

They recommended 295 so the side profile matches best with the rears. I think it’s also because they couldn’t make 285 work and didn’t think to suggest 275.

When I rejected 295, they offered the option for 275.
gotcha. That is true, but 275/35 and 305/30 is only 0.1" more in variance between front and rear diameter than the stock setup (0.4" vs 0.3"). I don't notice it now, can't imagine I would with an extra 0.1".
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      06-24-2020, 01:45 PM   #7
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275 is the widest u can run upfront without any rubbing. 295 is way to big for the front. I wanted to run 285s up front but those were rubbing.
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