? FOr yous fitment/wheel/offset gurus

[quickdodge®]

Wheel Offset

The wheel offset is the distance from the hub mounting surface to the centerline of the wheel. There are three types of offsets.

Positive Offset
A positive offset means the mounting surface of the wheel is positioned in front of the true centerline of the wheel. Most factory rims will have this type of offset.

Zero Offset
When the hub mounting surface is centered within the rim, it is known as a zero offset.

Negative Offset
If the hub mounting surface is on the brake side of the center line of the rim, it is considered a negative offset or "deep dish".

You know what, lolol? That description, for some reason, made it more clear than anything else I've read. Thanks.

Now what about backspacing? How is that figured? Later, QD.

[PURP]

You know what, lolol? That description, for some reason, made it more clear than anything else I've read. Thanks.

Now what about backspacing? How is that figured? Later, QD.

Wheel Backspacing and Offset

Before mounting a set of aftermarket wheels, there are some dynamics involved with fitment that are best to understand first.
1. Wheel Diameter. This is the diameter of the wheel. Stock wheels are commonly 15 or 16 inch diameter. This dimension is usually in 1 increments (i.e. 15, 16, 17) but some manufacturers offer 16.5, which is rare.
2. Wheel Width. This is the width of the wheel, measured inside the outer lip of the wheel. This dimension is usually in 1/2 increments (i.e. 7.5, 8)
3. Wheel Center. This is the center of the wheel in relation to the width.
4. Offset. The distance from the centerline of the wheel to the face of the mounting surface of the wheel that contacts the hub.

4.1 Zero Offset. Indicates the mounting surface is at the wheel center.
4.2. 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)
4.3 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.

5. 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] ).
6. Centerbore. The centerbore of a wheel is the size of the machined hole on the back of the wheel that centers the wheel properly on the hub of the car. This hole is machined to exactly match the hub so the wheels are precisely positioned, minimizing the chance of a vibration. This measurement may be critical to clear the hubs of a 4WD.
7. Bolt Circle. Also known as PCD (Pattern Circle Diameter). The bolt circle represents the diameter of an imaginary circle that goes through the center of the bolt holes. 4x2 Tacoma Bolt Circle: 5 lug on 4.5 PCD; 4x4/Prerunner Tacoma Bolt Circle: 6 lug on 5.5 PCD.

Hope this helps as well

[RL...]

thanks purp, those posts helped a lot...that makes more sense now...

So why is it that I have never heard anyone say negative 25 or positive...I've only heard ppl say "oh my offset is xx"...and how can I figure out what offset is best for my car?

The wheels I am looking at are work meister s1 replicas and am trying to figure out what would be best...like these

[speedminded]

thanks purp, those posts helped a lot...that makes more sense now...

So why is it that I have never heard anyone say negative 25 or positive...I've only heard ppl say "oh my offset is xx"...and how can I figure out what offset is best for my car?

The wheels I am looking at are work meister s1 replicas and am trying to figure out what would be best...like these

http://ll.speedhunters.com/u/f/eagam...1/IMG_9181.jpg

Because you're never around cars baller enough to have a negative offset.

This should help visualize what different widths and offsets mean on the same wheel...