how much less aggressive is a 19x9.5 +30 compared to 19x8.5 +15? Both are on 255/35s. Right now, I am thinking approx 2mm less. Correct? Also, what offset would on a 19x10.5 w/ 255/35s would be equivalent to the 8.5 +15.

Thanks!

 

The 9.5 +30 is roughly 3mm less aggressive. It's approximately 6mm for every half inch.

For the 10.5 to be equivalaent to the 8.5 +15 it would have to be a +39 offset.

 

You know there IS other stuff to mod on these cars besides your wheels/spacing

 

Edit: JUst saw your thread on the headlights, nice work!

 

good to know......


If it helps any I have 9.5" in the rear with +40 and it's flush and in the front I have 8" with same 40mm offset but a 15mm spacer and it sits almost flush...so esentially +25 on 8 in the front.
Figure 1/2" = 12.7mm if your are calculating offset and rim width.

 

Thanks Levon!

 

Not saying your wrong, but isnt a 25mm spacer an 1inch so would 12.5 be a half.

Because when I put my 10mm spacer on my car it make it a +22 but wouldnt it be the same if I was to just get a 19x10 +22 without a spacer?

 

you are right ....closely,,,,,12.7mm equals .5 in..

 

Sorry, I actually wanted a offsets for 10s not 10.5s. So since the 10 is 1.5" wider, that would equal 38.1mm. Half of that would be 19.05 (19mm).

Therefore 8.5 +15 would equate to 10 +34?

 

^Yes that is correct.

This is the offset calculator tool that I use, it may be of help to you: http://marksink.com/tire_wheel_offset/offset.html

 

word. Thx.

 

12.5 would be half an inch, but it's not half an inch when comparing different widths of wheels with equivalent offsets....check out this chart (this is from the Garson website)



Take a look at the standard disk, 19x9.5. For a 135mm lip, you would have a +16 offset. To have the same amount of lip and go to a 10.0 it's 6mm more, thus a 19x10 +22 and for a 19x10.5, the offset is +28.

If you recall, I had a 9.5+3 with a 15mm spacer, making it a 9.5 -12. Now I will have a 10.5 +0 which is about the same and it sits about the same as well (minus the tire sticking out more since it's wider).

You can refer to the offset calculator Marcus posted to confirm that. According to the offset calculator, my 10.5 +0 up front sticks out 1mm which I would say is about right since it doesnt stick out like crazy.

 

Seems about right. According to that chart the 8.5 +12 is the same as 10.0 +30. So my +15 would be +33 and for a 9.5 +27

 

There's a certain way to explain it, I'm just not explaining it as I should, but it's kinda like....ummm....basically when you go with a wider wheel, say a 10.5" over a 9.5" it's not one side that gets extended a whole inch (25 mm), it's the entire wheel, so 1/2" on each side, thus 12.5mm. Now when you add a spacer, you're only adding it on one side of the wheel, so to push it out a full inch, a 12.5mm spacer would be needed. That's why I mentioned 6mm, it's easier to go by equal units (6 and 12) rather than 6.25 and 12.5, that just makes it more confusing.

I hope what I said makes sense.

 

it does and that is the logic I have been using.