What size tires should I get?
11-01-2011, 10:28 AM
#11
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My Ride: 2006 Titanium Silver BMW 530iA, Sport & Premium Package, Active Steering, Anti-Roll-Suspension, Adaptive Headlight, Navigation, OEM M-Tech Kit, Authentic RD Trunk Spoiler, VIP Modular Wheels: 245/35/20; 275/30/20, OEM M Trunk Finisher.
Hey guys,
Check out this site:
http://www.1010tires.com/TireSizeCal...?action=submit
Correction: The wider width of the tire does "in fact" increases the side wall height! For example, if you go from 275/30/20 to 285/30/20, the side wall height does increases even though both tires appear to have the same side wall height profile ("30").
If you compare the "revolutions per mile", it appears that the 285/30/20 would go well with 245/30/20. However, the captioned website states any increase more than 3% could affect the effectiveness of braking! And maybe that is why a lot of people are going with 275/30/20 or change to bigger brake calipers.
In my case, the offset of my back wheels is too agressive (10.5x20; et 13). I don't think rolling the fenders would keep the back tires from "sitting under the edge of the fenders" should I decided to increase my 275/30/20 to 285/30/20.
Anyways, that's pretty much my underestanding and just wanted to share.
Check out this site:
http://www.1010tires.com/TireSizeCal...?action=submit
Correction: The wider width of the tire does "in fact" increases the side wall height! For example, if you go from 275/30/20 to 285/30/20, the side wall height does increases even though both tires appear to have the same side wall height profile ("30").
If you compare the "revolutions per mile", it appears that the 285/30/20 would go well with 245/30/20. However, the captioned website states any increase more than 3% could affect the effectiveness of braking! And maybe that is why a lot of people are going with 275/30/20 or change to bigger brake calipers.
In my case, the offset of my back wheels is too agressive (10.5x20; et 13). I don't think rolling the fenders would keep the back tires from "sitting under the edge of the fenders" should I decided to increase my 275/30/20 to 285/30/20.
Anyways, that's pretty much my underestanding and just wanted to share.
I talked to a sales manager of a tire shop today. He said going from 275/30/20 to 285/30/20 is "not going to do anything more than giving me wider wheels." Thus, the height (30) will stay the same! The wider wheels might give "a little" meat to protect the rims from road rashes if you happen to hit the side of the curbs and "that is all". With that said, unless the height of the wheels can be increased (unlikely to happen if I don't roll the fender), it would not make sense for me to go wider than what I currently have.
According to the info tirerack.com provides, 285/30/20 "should be" the minimal size for the specifications of my rear wheels (anything less is too small for the width of the wheels). Check out this link and click on the SPECS TAP:
http://www.tirerack....1=yes&tab=Specs
Because I have an et 13 on 10.5" wheel width (too aggressive for a non M5), the wider wheels (going from 275 to 285) can be hazardous if it sits below the fender, especially if I have heavy passengers and bumpy roads. In my case, 275/30/20 is too narrow or small for a 10.5" wheel width; and maybe that's why my TPM keeps telling me that I have a flat tire every 5 days (leaking air because of that, perhaps).
I hope this info will help anyone who needed better understanding like I did...
According to the info tirerack.com provides, 285/30/20 "should be" the minimal size for the specifications of my rear wheels (anything less is too small for the width of the wheels). Check out this link and click on the SPECS TAP:
http://www.tirerack....1=yes&tab=Specs
Because I have an et 13 on 10.5" wheel width (too aggressive for a non M5), the wider wheels (going from 275 to 285) can be hazardous if it sits below the fender, especially if I have heavy passengers and bumpy roads. In my case, 275/30/20 is too narrow or small for a 10.5" wheel width; and maybe that's why my TPM keeps telling me that I have a flat tire every 5 days (leaking air because of that, perhaps).
I hope this info will help anyone who needed better understanding like I did...
11-01-2011, 04:38 PM
#12
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I don't know about rubbing...as I have 20x10 in the rears but I should have went 285. The 275's look "stretched" on the rims...the sidewall actually angles in. I think you could go 295 with a lower profile...
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