Please Help/teach Me With Off Set
04-06-2004, 09:21 AM
#1
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Location: Due to global Warming, the new hot spot.........Canada
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I am looking into some rims as i posted in another thread. The rims I am interested in are 18's. The problem is in the dealer book the largest width they come is 8. Im currently trying to find out if i can order custom sizes for them. If i cant get them to do custom 18's in 10" wide for the rear, then I may have to go 19" (dont really want to though). In 19's they come in all sizes from 8" to 10" width.
Now my question is i have read tons of threads of peeps asking what offset to buy, they recieve answers but never a way of how they got that off set.
How do you determine offset for my rims in question? How do you know that once you think you have the correct offset that once you install them they wont rub?
Shawn
Now my question is i have read tons of threads of peeps asking what offset to buy, they recieve answers but never a way of how they got that off set.
How do you determine offset for my rims in question? How do you know that once you think you have the correct offset that once you install them they wont rub?
Shawn
04-06-2004, 09:24 AM
#2
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Location: union, new jersey
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04-06-2004, 09:29 AM
#4
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04-06-2004, 12:05 PM
#5
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Offset is simple to understand.
Here it is in English:
Offset is the distance from the rim's mounting point on the axle, to the center of the rim.
For example, (note, thisis as simple as it can possibly get LOL):
If you have a 10 inch wide rear rim, it's center would be at 5 inches right? Now a Zero Offset would make the rim's mounting hub right at that spot, +50mm offset would move the mounting point 50mm towards the outter edge of the rim (the outter edge is where the spokes are LOL), and a -50mm offset would move the mounting point -50mm to the inner edge of the rim.
50mm is like 2 inches, so if you were to get a -50mm offset rear rim in a 10 inch width, the mounting point of the rim would be 2 inches toward the inner edge.
Get it?
Here it is in English:
Offset is the distance from the rim's mounting point on the axle, to the center of the rim.
For example, (note, thisis as simple as it can possibly get LOL):
If you have a 10 inch wide rear rim, it's center would be at 5 inches right? Now a Zero Offset would make the rim's mounting hub right at that spot, +50mm offset would move the mounting point 50mm towards the outter edge of the rim (the outter edge is where the spokes are LOL), and a -50mm offset would move the mounting point -50mm to the inner edge of the rim.
50mm is like 2 inches, so if you were to get a -50mm offset rear rim in a 10 inch width, the mounting point of the rim would be 2 inches toward the inner edge.
Get it?
04-06-2004, 09:01 PM
#6
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Join Date: Aug 2003
Location: Silicon Valley
Posts: 111
Keep in mind that offset and Backspacing/Frontspacing are not the same. So if you're looking at a wheel that in the books says it's 8" wide, it's actually about 9.5" wide from the outside of the outer lip to the outside of the inner lip. you must account for the thickness of the lip width.
Offset and wheel width are gained by measuring from inside of the inner and outer lips. This is where most people mess up.
Peace, Rishie
In all honesty for a standard setup for a standard function you should just go with something like a +40 to +50 offset and you'll be great. If you want 10" wide don't go lower than a +45.
Offset and wheel width are gained by measuring from inside of the inner and outer lips. This is where most people mess up.
Peace, Rishie
In all honesty for a standard setup for a standard function you should just go with something like a +40 to +50 offset and you'll be great. If you want 10" wide don't go lower than a +45.
04-07-2004, 09:04 AM
#7
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Join Date: Jan 2003
Location: London, Ontario
Posts: 2,871
Originally Posted by SageFC' date='Apr 6 2004, 09:01 PM
Keep in mind that offset and Backspacing/Frontspacing are not the same. So if you're looking at a wheel that in the books says it's 8" wide, it's actually about 9.5" wide from the outside of the outer lip to the outside of the inner lip. you must account for the thickness of the lip width.
Offset and wheel width are gained by measuring from inside of the inner and outer lips. This is where most people mess up.
Peace, Rishie
In all honesty for a standard setup for a standard function you should just go with something like a +40 to +50 offset and you'll be great. If you want 10" wide don't go lower than a +45.
Offset and wheel width are gained by measuring from inside of the inner and outer lips. This is where most people mess up.
Peace, Rishie
In all honesty for a standard setup for a standard function you should just go with something like a +40 to +50 offset and you'll be great. If you want 10" wide don't go lower than a +45.
In that stickie linked at the top of the page you didn't mention spring diameters required. I thought the 'Max Cooper' fitment required coilovers?
04-07-2004, 01:58 PM
#9
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Posts: 5,547
Originally Posted by Baldy' date='Apr 7 2004, 09:37 AM
so if where the spokes meet the rim is at the center of width of the rim, but the spokes are angled outward to have the axle mounting point at +45, is the offset +45 or 0?
04-08-2004, 07:35 AM
#10
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Originally Posted by Srce' date='Apr 7 2004, 01:58 PM
It's +45, it's 0 only if the mounting point is at the dead center of the rim, where the spokes meet the rim doesn't matter.