15x8 sport max wheels

[rotarykidd]

I need some help here. i'm looking at this wheel. i love the huge lip.

http://cgi.ebay.com/ebaymotors/15-8-Sportmax-002-Wheel-Scion-xB-AE86-GTS-Rims-JDM-RED_W0QQcmdZViewItemQQcategoryZ43955QQihZ018QQitemZ280180934904

are they too wide? what offset do i need? and i was thinking about a 195/50/15 for the stretched sidewall look, but should i do the 195/45/15 or maybe a 205?
thanx,
-kyle-

[FB71]

we've got a set of those in black on a tuner xB at work. Stretched tires, too. They actually look pretty cool!

[muscle_Car1]

Standard offset for festy's are 38mm not the 0 offset those have

[elcamino1]

The ad says that they won't fit front wheel drive cars.

[FestYboy]

Offset don't mean $h*t, it's the backspacing you should be worried about as that's what causes clearance issues. Offset is just the measurement of the mounting surface from the centerline of the wheel... example: 16x6 and 16x8 wheels can both come with a +35 offset, but only the 16x6 wheel will fit a festiva because the added inch of BACKspacing on the 16x8 will hit the strut and swaybar (when turned). you need to know what clearance you have from the hub surface to your strut and figure the backspacing of the wheel for propper fit. the 15x8s you're looking at have a 4" backspacing with the 0 offset, meaning that they WILL fit without touching any suspention component, BUT, they will also stick out past your fender and can posssibly rub the fender lip during suspention jounce.

[FB71]

yup, that's the way the xB looks. Wheels stick out about 2"

[rotarykidd]

i know the standard offset is 38, but FestYboy and FB71 are right. i think the wheels would look sweet with an fms kit, fender flares, and if the car is lowered. all im conserned about is if the wheel will hit the strut. if not than i guess i will have to get the ones without the huge lip.

[muscle_Car1]

Offset don't mean $h*t, it's the backspacing you should be worried about as that's what causes clearance issues. Offset is just the measurement of the mounting surface from the centerline of the wheel...

Offset=The distance from the centerline of the wheel to the face of the mounting surface of the wheel that contacts the hub.

Zero Offset. Indicates the mounting surface is at the wheel center.

Negative Offset. Indicates the mounting surface is behind (or inboard) the centerline of the rim. This is often found on standard rear-wheel-drive vehicles and on so-called reversed rims. (Diagram below shows negative offset)

Positive Offset. Indicates the mounting surface is in front of (or outboard) the centerline of the rim. This is often found on front-wheel-drive vehicles. Stock Tacoma wheels have Positive offset.

Backspacing=The distance from the mounting surface to the inside lip of the wheel. This measurement is closely related to offset (without actually measuring, backspacing is about equal to [Wheel Width / 2] + [Offset] + [about 1/4] )

So maybe it does mean anything...

I'm not seeing you fit 8 inch wide rims with out cutting off the rear quaterpanels. I know with fms springs the tires are inside the quarterpanel.


In the morning I'll go measure the width between the strut & quarterpanel.

[Sp33dY]

Whats the stock wheel width? 12" x 5" ? ..... somehow i dont think the 15s ive got coming stand a chance of fitting ... if they do, it'll be very very close

[muscle_Car1]

12x4 i think. pretty tiny regardless.

[FestYboy]

Offset don't mean $h*t, it's the backspacing you should be worried about as that's what causes clearance issues. Offset is just the measurement of the mounting surface from the centerline of the wheel...

Offset=The distance from the centerline of the wheel to the face of the mounting surface of the wheel that contacts the hub.

Zero Offset. Indicates the mounting surface is at the wheel center.

Negative Offset. Indicates the mounting surface is behind (or inboard) the centerline of the rim. This is often found on standard rear-wheel-drive vehicles and on so-called reversed rims. (Diagram below shows negative offset)

Positive Offset. Indicates the mounting surface is in front of (or outboard) the centerline of the rim. This is often found on front-wheel-drive vehicles. Stock Tacoma wheels have Positive offset.

Backspacing=The distance from the mounting surface to the inside lip of the wheel. This measurement is closely related to offset (without actually measuring, backspacing is about equal to [Wheel Width / 2] + [Offset] + [about 1/4] )

So maybe it does mean anything...

I'm not seeing you fit 8 inch wide rims with out cutting off the rear quaterpanels. I know with fms springs the tires are inside the quarterpanel.


In the morning I'll go measure the width between the strut & quarterpanel.

so what are you saying here that i havn't (bluntly) said already? offset is like the horsepower of rim sizing, it's jsut an arbitrary measurement. you need to know backspacing so you don't hit suspention components. besides bolt patern, it's the next most important measurement for fitting wheels.

[perucho]

It also bugs me when someone just mentions offset like it's a magic number. A 4" wheel with 38mm offset IS NOT THE SAME as an 8" wheel with 38mm offset. It doesn't matter that the offset is the same. Let's compare apples to apples.

[rotarykidd]

well ive decided on a set of 14"s. i figure they would fit better than this style after i lower it.

[muscle_Car1]

So both a vehicle's horsepower & a rims off set are arbitrary measurements?
How so? They lack any rational basis?
The "horse" in horse power yes. Its very optimistic that a horse could pull 180lbs around a 24ft circle 144 times an hour, but not the math behind it.

Now maybe dave colemans monkey power is a fun one. One HP is .33232628398791540785498498425982 Monkey Power

Backspacing is important, but not all powerful.
I agree with perucho, on its not a magic number. By definition its the distance from the center line of the wheel.

So if 4in=101.6 & 8in=203.2

center-line of each is

50.8mm 101.6mm

+ 38mm offset

88.8mm 139.6mm


139.6mm-88.8mm = 58.8mm

or about 2" difference in backspacing

[perucho]

One more thing, a 4" wheel is actually 5" overall. An 8" wheel will be 9" wide overall. The rated width is the interior width. You have to add 1/2" for each side to measure the outer width.