Jump to content

19" Rims For 01 Gs430


Recommended Posts

After reading a lot of post I believe that the best size rims would be 19", mainly because I don't want to roll the fenders with my l-sportline drop. I have been looking into different rims and learned a lot for a first time buyer, but am still confused as to the exact meaning of "offset".

How does this apply when looking into rims sizes? Please explain to me like a child, because in reading these posts it just doesn't click in my child-like brain. Why do people sometimes get different offsets in the front and rear...

Link to comment
Share on other sites

Offset is the distance from the centerline of the wheel to the mounting surface of the wheel.

Negative offset is when the back of the bolt pad is closer to the inside of the wheel; when mounting surface is inboard of the rim centerline. (more of the rim and tire tread is sticking out of the fender wells.)

Positive offset is when the back of the bolt pad is closer to the street side of the wheel; when the mounting surface is outboard of the rim centerline. (more of the rim and tire tread under the car)

Here is a picture that shows it barney style.

offsetdiagram.500.jpg

Tech terms:

For example, an 8-inch wide, 3-inch-rear spacing wheel would have a 1-inch negative offset. Conversely, if the same 8-inch wheel had a 5-inch rear spacing, it would then have a 1-inch positive offset. Finally, if the same wheel had a 4-inch rear spacing (which is exactly half its width) then the wheel would have what's known as a "zero offset

here is a picture of my rear rim and tires. Offset is +40. Front 19x8.5" +34 offset rear 19x9.5" +40 offset.

post-11139-1113268632_thumb.jpg

Link to comment
Share on other sites

Now that someone has taken care of the technical explanation (saves me from having to type something similar ;) :D ), the combination of the rim width and offset will determine how close your wheel gets to touching the fender. The lower the offset number (in this case, +14 is lower than +34), the closer you are to the fender and if low enough, past the fender an is actually sitting on the "outside" of the car body.

The front and rear wheel well have different tolerances and some get different offsets to get the best result in terms of how flushed they want to get to the fender.

Link to comment
Share on other sites

"The lower the offset number (in this case, +14 is lower than +34), the closer you are to the fender and if low enough, past the fender an is actually sitting on the "outside" of the car body."

So I must be stupid...looking at the picture at looking at this statement makes me wonder. So a lower offset would push me outside the car? When looking at the picture it would seem that that more negative effect will bring me into the tire well and tuck the rim.

-confused

Link to comment
Share on other sites

"The lower the offset number (in this case, +14 is lower than +34), the closer you are to the fender and if low enough, past the fender an is actually sitting on the "outside" of the car body."

So I must be stupid...looking at the picture at looking at this statement makes me wonder.  So a lower offset would push me outside the car?  When looking at the picture it would seem that that more negative effect will bring me into the tire well and tuck the rim.

-confused

LOL. You are not stupid. :) Let me try to explain the pic. As I am typing this, the linked pic seems to be gone so I am linking another one.

Poffset.gif

I have a feeling you may have only done step one of looking at the offset in your mind. If you look at the pic and see what is marked as positive offset, it would seem like as the offset gap increases, the face of the wheel seems to move more towards the fender and "outside" of the car. In a sense, this is true. But then, you have to mount the wheel onto the car. If you imagine this step, then the mounting surface needs to go that much farther in so that the wheel can mount onto the car.

So, the bigger the gap from the center line (the larger the +offset number), the farther it has to go back inside the fender to mount onto the hub. Therefore, the smaller the offset number, the less the wheel goes in to be mounted. If you look at the numbers, then as the +offset number decreases, the rim face (seemingly) move outwards towards the fender and possibly beyond.

Does this make sense?

Link to comment
Share on other sites

Oops "the lugs go on from the right "...missed that in the first picture.  It now makes perfect sense.  Thanks

Lol. :)

Yes, car on the left then wheels then lug nuts on the right. If you look at the positive offset picture, this is really the only way it can work. ;)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



×
×
  • Create New...

Forums


News


Membership


  • Unread Content
  • Members Gallery