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View Full Version : Offsets and widths - looking into new wheels.



Periodic
12-12-2012, 06:33 AM
So having spent the last month searching and reading, ive decided to make my own thread amd get some specific opinions.

For starters, I have decided to go with the VMR V701, gunmetal 19". Simple.

Now comes some math.

A 19x8.5 rim et35;
Width = 216mm
Centerline = 108mm
Offset = 35mm
Therefore, front face of wheel to hub is 73mm. [216-(108+35)]

A 19x9.5 rim et45;
Widtg =241mm
Centerline = 120.5mm
Offsey = 45mm
Therefore, front face of wheel to hub is 75.5mm.
[241-(120.5+45)]

so..as for looks...both wheels should have the same amount of concavity to them.

Now throw on the 275 width tire.
On the 8.5" rim.
Tire width = 275mm
Wheel width = 216mm
Theoretical tire beyond rim face is 29.5mm. [(275-216)/2]. So, theoretically about 1-3/16".

On the 9.5" rim.
Tire width = 275mm
Wheel width = 241mm
Theoretical tire beyond rim face is 17mm. [(275-241)/2]. So, theoretically about 11/16".

Heres where I am in the fence, my gut feeling is that a 9.5 rim wont be protected enough from the tire. I hate the look when a rim looks too wide for a tire. Perhaps some of you could post some nearly perpendicular pictures of your tires to give me any idea. My thoughts are that some people are throwing 275s on stock 8" wheel, therefore the extra 1/2" width will only sit to improve how the tire is seated.

And from what I can tell, it wont look all that different to have staggered with those offsets. 2mm difference from face of wheel to hub. The bulk of the width is towards the center of the car.

Appreciate the input!

Sent from my Galaxy Note II using Tapatalk 2.

Slizzo
12-12-2012, 06:51 AM
Rim protection is dependent on the brand of tire more than that of the width of the tire really. Not all tires are the same width regardless if they have the same size designation. This is much like shoes that you buy, Nike size 12 will be different sizes slightly than a New Balance size 12.


Otherwise, your rims that you listed will fit fine. Very slight chance of rub on the rears with a 275mm, but you'd have to have the car loaded, and you'd have to hit a good bump to potentially get it to rub.

Steve GT
12-12-2012, 07:11 AM
9.5" width on 275s is perfect. I run 285s on 10.5s and there is a slight stretch.

vert
12-12-2012, 09:21 AM
I would run a higher offset on the front and I am switching over to 285 on my 9.5 wheels.

gr8lover
12-12-2012, 10:01 AM
275's are perfect on a 9.5" wheel.... there is planty of protection and does not looked stretched at all.... the guys with 10" wheels with 275's... those seems stretched to me...

I will try to post up some pics when I have time,

pir4te
12-12-2012, 03:41 PM
Perhaps some of you could post some nearly perpendicular pictures of your tires to give me any idea. My thoughts are that some people are throwing 275s on stock 8" wheel, therefore the extra 1/2" width will only sit to improve how the tire is seated.

And from what I can tell, it wont look all that different to have staggered with those offsets. 2mm difference from face of wheel to hub. The bulk of the width is towards the center of the car.

Wide rubber will give better 60 foot times but not ideal for me as Daily Driver / high speed cruiser:
Kuhmo KU31 Asymmetrical 255/40R19 on 8" std rim, spaced +15mm a side using eibach (Camaro) hub centric TüV adaptors.
Gives a wide rear track of 1640mm = Same as Lamborghini Diablo, wider than 99% of supercars.
KU31 has perpendicular side walls (nitrogen @ 44psi) giving widest perfect fit without guard mods on your G8 on 19s:
http://img.tapatalk.com/d/12/12/13/uda7ydeg.jpg
Creates Staggered F/R track ratio as per HSV & race spec without the price, noise, bad economy due to rolling resistance and undesirable too-wide tyre handling characteristics of the 'Flintmobile' (Fred Flintstone's car).
Can also swap front / back / spare.

Periodic
12-13-2012, 04:45 AM
Did you need to restud your hubs to fit those spacers? Being able to swap the wheels around is also appealing

Sent from my Galaxy Note II using Tapatalk 2.

vert
12-13-2012, 07:25 AM
Here are pics of my 275's Hankook on a 9.5" rim which I think they look a little stretched. I really think it all depends on the tire manufactur and the width of the 275 that you buy.

Slizzo
12-13-2012, 08:10 AM
Here are pics of my 275's Hankook on a 9.5" rim which I think they look a little stretched. I really think it all depends on the tire manufactur and the width of the 275 that you buy.

My Ventus V12s didn't look stretched on a 9.5" with a 275mm wide. The 285s looked slightly bulged if anything.

pir4te
12-13-2012, 09:43 PM
Did you need to restud your hubs to fit those spacers? Being able to swap the wheels around is also appealing

No, Eibach Camaro 2010 hubcentric bolt-on spacers
http://img.tapatalk.com/d/12/12/14/mu4umequ.jpg
part numbers
15mm - 90.4.15.027.2
20mm - 90.4.20.035.2
25mm - 90.4.25.051.2
30mm - 90.4.30.044.2
http://img.tapatalk.com/d/12/12/14/6usu9u9u.jpg
Mate you simply won't believe the difference this makes, spectacular!

unitofstuff
12-15-2012, 09:23 PM
My 285 Hankooks on 9.5" wheels look pretty much perfectly squared up. No stretch, no bulge.