Offsets and spacers.... How to figure Et's

[GermanlookT3]

Im just confused on Et's ... Ive found a set of rims ( ET 23.3 ) and the Adapters are 25mm... How much would that push the wheels out? Or is there a way to figure out what the total Et would be? Im just wondering how much stretch would be needed

[00bmw323]

23-25= -2

[GermanlookT3]

Guess it would help that its for an E28

[GermanlookT3]

ok so I guess thats were Im confused. -2 would mean thats pushed out correct? The Higher the Offset the further the wheel is "out of the wheel well" Right?

Heres the Definition:
Offset is the distance from a wheel's mounting surface on the hub to the centerline of the wheel, in millimeters. Negative offset means the mounting surface is towards the inside of the wheel. With positive offset, this surface is biased towards the outside. Typically, wider tires require more positive offset to avoid contact on the inner fender well.

So as far as my brain is working... If I had an offset of 23.3 and added 25mm spacers that would Actualy put the wheels edge just over the Fender. Perfect for stretch, Hmmm Any e28 guys have any recomendations?

[jcbe34]

One inch is 25.4mm.. So the adapters will push your wheels out around an inch. Those ET's will work fine on an e28

[FreshLikeSushi]

negative offset means the hub is closer to inner barrel, pushing the outer lip out
positive is the opposite.

[GermanlookT3]

One inch is 25.4mm.. So the adapters will push your wheels out around an inch. Those ET's will work fine on an e28

Awesome! Im taking the plunge... Doing something nobody has done yet

[jcbe34]

How wide are the wheels, negative offsets will work to a point..

[horchata]

How wide are the wheels, negative offsets will work to a point..

quoted for truth. super low offsets on wheels that aren't that wide just look dumb. i **** when you can see the whole tread pattern of the tire sticking out past the bumper if you're standing behind the car.

[GermanlookT3]

Rims are 16x8 et 23.3 with 25mm spacers

[M.Burroughs]

They'll be perfect on an e28.

[GermanlookT3]

They'll be perfect on an e28.

Thats what I was hoping you would say
How much stretch would that be? just tryin to get an idea

[tivs31]

wut?

stretch is on a tire, no where in the thread did you mention the tire.

Anyway here's a simple way to think of offsets: if the hub of the wheel is exactly in the center of the of the wheel, say on a 9" wheel it's 4.5" from the face the offset is 0.

Now when you move the hub face forward, the offset increases positively, so if it moves 1" forward, your offset is now 25. If it move inwards, then your offset is -25, the opposite. Offset is calculated in mm, so 1"=25.4mm.

It's really pretty simple. When you add spacers. adapters , your essentially moving the face of the wheel outwards, so take the spacer/adapter, and subtract the width from the original offset on the wheels.

[GermanlookT3]

wut?

stretch is on a tire, no where in the thread did you mention the tire.

Anyway here's a simple way to think of offsets: if the hub of the wheel is exactly in the center of the of the wheel, say on a 9" wheel it's 4.5" from the face the offset is 0.

Now when you move the hub face forward, the offset increases positively, so if it moves 1" forward, your offset is now 25. If it move inwards, then your offset is -25, the opposite. Offset is calculated in mm, so 1"=25.4mm.

It's really pretty simple. When you add spacers. adapters , your essentially moving the face of the wheel outwards, so take the spacer/adapter, and subtract the width from the original offset on the wheels.

ok that makes sence.

Im sorry I didn't mention tires. Im thinking 205/40r16 sound good? 195's are a little too short for an e28. Even if I was dragging frame the wheels would barely fill the fender.

[Tuck&Poke]

205's on an 8 are essentially zero stretch, 195's are a little stretch. The brand of tire is going to make a difference too. some tires run a little wider or narrower than others. Profile is also going to affect stretch, not so much in the actual amount stretched, but how stretched it looks