Rim's Offset

[trism]

no, the centre line doesnt change position. its the centre line. it stays at the centre.

its the hub that moves. it its on the centre line, its 0 offset. the further it move out, the larger the positive number becomes. so a 9" wide wheel with +20offset has a deeper dish than one with +50 offset. 30mm more dish infact.

[DLO01]

so a 9" wide wheel with +20offset has a deeper dish than one with +50 offset. 30mm more dish infact.

^^^ That is correct. A lower offset and you have more room for larger calipers. Thats the guys original query.

no, the centre line doesnt change position. its the centre line. it stays at the centre.

its the hub that moves. it its on the centre line, its 0 offset. the further it move out, the larger the positive number becomes.

^^^ Thats incorrect. How can the hub move, its a fixed part of the car? A lower offset moves the centerline of the wheel outward. Thats why lower offsets stick out of the gaurds and why lower offsets rub on gaurds.

[trism]

:/

i still dont agree.

not the hub of the car, the part of the wheel that bolts to the hub of the car. it moves in relation to the centre of the wheel.





the dish is on the outside of the wheel, not the inside.

the more dish (less offset) you have on teh "front" or outside of the wheel, the less room there is on the inside of the wheel, or the part where the brakes are.



these have negative offset. there is lots of dish, and not alot of room on the inside for brakes. it also pushes the outer edge of the wheel out, and will stick out of the guards


the less dish (more offset) you have, the more room for brakes


and it pushes the inner edge of the wheel in, and will scrub on the springs.



like so

[DLO01]

Last post. Those are just photo explaining offset distances.

Your hub on your car does not move. The Face on the wheel bolts up to this hub face. You have to picture this WILL stay still.

Therefore if you have a higher offset +50 the wheel will sit in more toward the car, therfore the centerline sits in more, further away from the hub.

If you have a lower offset +40 the wheels will sit out more toward the gaurd, therefore the centerline sits out more closer to the hub.

[DLO01]

Ultra last post. I am just being nice.

You've got it the wrong way.

Look at that last photo, or whatever photo.

Take the +30 offset and the 0 offset.

See how the +30 offset the spoke bend in toward the brakes? This will hit calipers. The 0 offset spokes are straight? This will clear. And the -30 definatly will clear.

[trism]

*nod*

i understand now

was always informed that if your calipers didnt clear the spokes, then you need higher offset.

misinformation is a killer

[DLO01]

All good. We learn something new everyday. I know offsets can be confusing. Its definatly a big misconception going round, always has been.

But yeh as I said, to clear big brakes. It really comes down to the ALL of the following: Wheel offset, size of wheel and the design of wheel.

[trism]

yeah, wheel design i spose.

thats prob where i got the more offset needed argument.

as in, the spokes didnt curve back, but actually curved the other way, so more offset was needed.

[Lukey]

Sorry to bring this back up again but I'm still a bit confused.

So bigger (positive, +38, 45, etc.) the offset the closer to the brakes and stuff the wheel is?
And the smaller (negative and neutral, 0, -10, etc.) the offset the closer the wheel is to the guards?

[LUD35]

Sorry to bring this back up again but I'm still a bit confused.

So bigger (positive, +38, 45, etc.) the offset the closer to the brakes and stuff the wheel is?
And the smaller (negative and neutral, 0, -10, etc.) the offset the closer the wheel is to the guards?

^^ sort of correct. think about it this way:

the higher the offset, the higher chance of bigger brakes not fitting - obviously it depends on the design of the spokes but you get the picture. by having a 35 offset(over a +50 offset) for example, you are creating 15mm of distance that can be further filled in by bigger brakes...

the small the offset the "flatter" the spoke design and the closer it is to the hub, thus there is a much smaller area given for the brakes to occupy.

[NightKids]

Thinking of getting these rims for my EG5:-



These are 15" . What would be a good offset? +35 or +40? Not too sure i just want it to look like EG5 (Yonas) car....

[LUD35]

^ they will fit over standard brakes, but if u want to eventually upgrade to something bigger ie. spoon,endless than you will have to sell them...or get spacers which i wouldn't recommend. personally, rims with a lower offset look a whole lot more tough than a higher offset.

imo get the +35 offset.