About Wheels

[!*heatseca*!]

Hey guys,

fairly dumb question, but can someone explain "offsett" and any other important things when looking for new wheels?

All i know is to look for 4 stud wheels... So my knowledge is pretty limited!

Thanks guys!

[E-Gene]

Sorry dude, this should be posted in the wheels section

[MR22ZZ]

offset, put quite simply, is the distace that the hub of the wheel is positioned from the centre of the wheel width. I'll try a little text diagram to explain... :P

the number (eg +40) means how far the distance is measured in mm

Wheel #1: 0 offset

hub side | open side

/=====\

-----|-----

-----|-----

-----|-----

-----|-----

\=====/

Wheel #2: +ve offset

/=====\

-------|---

-------|---

-------|---

-------|---

\=====/

Wheel #3: -ve offset

/=====\

---|-------

---|-------

---|------

---|-------

\=====/

For corollas you want ~+40

Edited September 17, 2005 by Blue_Stivo

[MR22ZZ]

another important thing is PCD

this is the diameter spacing of the lug nuts eg 4x100 or 5x114.3 etc

these are measured by assuming a circle which incorporates all the lug bolts and measuring the diameter of this circle (again in mm). The first number comes from how may lug bolts there are (4,5 or 6 for cars and 4x4s).

[Ic3Man]

was wondering wat offset was all about also ..

those vertical lines that you drew down the middle, to the left and right.. what are they meant to represent ?

is it the middle of the pattern of the tread ?

[leasaunce]

ahh sweet thanks for the info dude! :D

[shaohaok]

Name of Wheel Parts

Wheel Size

Offset

The offset indicates the distance from the center of the rim to the attaching disk part (unit:m/m). As seen in the attached drawing, the offset is indicated by "+" when the fitting surface extends beyond the central line of the rim and "-" when it is falls within. Caution is required to prevent the tire from coming into contact with the fender of the vehicle or the brake caliper if the offsets are very different.

P.C.D.

The number of bolts used to install a wheel varies from 4 to 6 depending on the vehicle model (except for some vehicle type), thus the wheel to be installed should also possess the same number of hub bolt holes. P.C.D. stands for pitch circle diameter, and indicates the diameter of the circle in mm connecting the center of each hub bolt. Since the P.C.D. also varies according to the vehicle model, make sure a suitable one is selected.

Clearance

Fender clearance indicates the marginal space between the tire and the fender or body of the vehicle. Inner clearance indicates the distance between the tire and wheel and the body part which is positioned closest to the tire and wheel. Dimensions for both right and left clearance should be measured on a level surface, and the smaller value is then considered as the inner clearance.

Tyre Size

1-Tire width (mm or inch)

2-Aspect ratio

3-Radial construction

4-Rim diameter

5-Load index

6-Speed symbol

7-Tire outer diameter (inch)

8-Ply rating

*from enkei.co.jp

could someone sticky this?

Edited September 17, 2005 by shaohaok

[MR22ZZ]

was wondering wat offset was all about also ..

those vertical lines that you drew down the middle, to the left and right.. what are they meant to represent ?

is it the middle of the pattern of the tread ?

←

it represents a cross-section of the rim. Using the little lines is the only way to provide a leader so the vertical lines stay in place. The forum does not allow a space leader and defults to 1 space and then they all look the same so the pictures would serve no purpose...

But look at Shao's post, has all the info there...

Cheers for that Shao, you always come through with the goods :D :D :D

but yeah... can Shao's post be copyed into a new post and stickied into the Wheel and Tyre section...

Edited September 17, 2005 by Blue_Stivo

[E-Gene]

Done

[sw20r]

It can be a variable when upgrading to larger diameter wheels ie

factory 14/15" 6" width tyres has +45

you can go lower offset with 7.5"-9" +35 width tyres down to maybe +25 and have some dish :D