How do offsets work?
- Thread starter SiR
- Start date
No, you're thinking of... the bolt patter: 4x100, 4x108, 5x100, 5x112, 5x114.3.
That basiaclly means that you have 4 (or 5) bolts and that they are spaced 100mm (or whatever) around. SiR's have 4x100.
I'm talking about the offset... it's usally somewhere around 40mm or so (35-45mm)... and it's used to determine how much to out to the side your wheels will stick out. Have you ever noticed how some cars have their wheels sticking out past their fender? That's due to offset (improper offset mind you).
.:SiR:.
That basiaclly means that you have 4 (or 5) bolts and that they are spaced 100mm (or whatever) around. SiR's have 4x100.
I'm talking about the offset... it's usally somewhere around 40mm or so (35-45mm)... and it's used to determine how much to out to the side your wheels will stick out. Have you ever noticed how some cars have their wheels sticking out past their fender? That's due to offset (improper offset mind you).
.:SiR:.
i thought it was 40.........that could just be me though......oh and i have a ex
but thats as far as i know...the off set has to do with the wheel and tire more than the car i think.............like if you have a tire with a 7 inch width the offset is 45 a 8 inch is like 32 mm so the total difference is insaide edge reamins the same the outside edge protrudes 26mm more ( i found a calculator for this)
The offset of a wheel is the distance from its hub mounting surface to the centerline of the wheel. The offset can be one of three types.
Zero Offset
The hub mounting surface is even with the centerline of the wheel.
Positive
The hub mounting surface is toward the front or wheel side of the wheel. Positive offset wheels are generally found on front wheel drive cars and newer rear drive cars.
Negative
The hub mounting surface is toward the back or brake side of the wheels centerline. "Deep dish" wheels are typically a negative offset.
The offset of a wheel is the distance from its hub mounting surface to the centerline of the wheel. The offset can be one of three types.
Zero Offset
The hub mounting surface is even with the centerline of the wheel.
Positive
The hub mounting surface is toward the front or wheel side of the wheel. Positive offset wheels are generally found on front wheel drive cars and newer rear drive cars.
Negative
The hub mounting surface is toward the back or brake side of the wheels centerline. "Deep dish" wheels are typically a negative offset.
So a stock SiR has a 40mm offset? So if I want wheels to stick out a bit I want more of on offset or less?
Wait, let's try this another way... if I have an 8" wheel, with a 40mm offset, then the wheel sticks ou 4"-40mm from the hub, is that right? Why do they have to mix metric and imperial? That's dumb.
Oh, and spacers are BAD... don't use them, it causes unnecessary strain on your bolts and can cause premature wear and in extreme cases lose of wheels!
.:SiR:.
Wait, let's try this another way... if I have an 8" wheel, with a 40mm offset, then the wheel sticks ou 4"-40mm from the hub, is that right? Why do they have to mix metric and imperial? That's dumb.
Oh, and spacers are BAD... don't use them, it causes unnecessary strain on your bolts and can cause premature wear and in extreme cases lose of wheels!
.:SiR:.
anfrey
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in for later. i'm interested. i do know, however, that 15"-17" superleggera wheels (7" wide) have a 37mm offset for 92-03 civics (4x100). while the 18" wheels (also 7" wide) have a 42mm offset...
the same wheels, on an itr, have a 45mm offset.
ok now i'm confused.
the same wheels, on an itr, have a 45mm offset.
ok now i'm confused.
no, it has nothing to do with the bolt pattern.
not from me: "The offset of a wheel is the distance from the mounting surface of the wheel to the true centerline of the rim. A positive offset means the mounting surface of the wheel is positioned in front of the true centerline of the rim / tire assembly. This in effect brings the tire in to the fender well more. Conversely, a negative offset means the mounting surface of the wheel is behind the true centerline of the rim / tire assembly. This will cause the tire to stick out away from the vehicle."
This thread has been very confusing.
Spitfire, why didn't you link him to tirerack so he could see the pic too?
http://www.tirerack.com/wheels/tech/offset.htm
Basically, a higher offset will be tucked in more. A lower offset will be closer to the fender. Since offset is based on wheel width, 2 wheels with different widths, but the same offset will fit differently on the vehicle.
Here's a couple examples -
17x7 +40 will not be as close to the fender as 17x7 +35.
If you go from a 16x7 +40 to a 17x7.5 +40, the wheel/tire will be 6mm closer to the fender and 6mm closer to the suspension. Clearance decreases evenly on both sides because you only increased width.
If you go from a 16x6.5 +40 to a 17x7.5 +45, the wheel/tire will be 8mm closer to the fender and 18mm closer to the suspension.
Hopefully that helps at least a little.
Spitfire, why didn't you link him to tirerack so he could see the pic too?
http://www.tirerack.com/wheels/tech/offset.htm
Basically, a higher offset will be tucked in more. A lower offset will be closer to the fender. Since offset is based on wheel width, 2 wheels with different widths, but the same offset will fit differently on the vehicle.
Here's a couple examples -
17x7 +40 will not be as close to the fender as 17x7 +35.
If you go from a 16x7 +40 to a 17x7.5 +40, the wheel/tire will be 6mm closer to the fender and 6mm closer to the suspension. Clearance decreases evenly on both sides because you only increased width.
If you go from a 16x6.5 +40 to a 17x7.5 +45, the wheel/tire will be 8mm closer to the fender and 18mm closer to the suspension.
Hopefully that helps at least a little.
if what you wrote means 4inches minus 40mm, then yes you were correct. (hahah sorry didnt understand what you wrote until now so i ignored it before)
the sir has 15x6 wheels with an offset of 38.
use this guide, it'll be easier:
Wheel Offset Calculator
the sir has 15x6 wheels with an offset of 38.
use this guide, it'll be easier:
Wheel Offset Calculator
speaking of Offsets... i want to make these wheels http://images.cardomain.com/member_images/9/web/381000-381999/381310_2_full.jpg fit my 94 ex... what kind of spacers would i need to buy for my car? thnks..
