offset/backspacing
10-31-2011, 12:12 PM
#1
Member
Thread Starter
offset/backspacing
I need a little help trying to figure out if the wheels I want will fit. I have a 2011 fx4 with a 2" level and am looking to get 20x10 xd rockstars with 305/50 terra's, the wheels have -24 offset. I am completely oblivious as to the whole offset/backspacing, I know negitive bs puts the wheel out more but will this require a lot of trimming to fit these wheels?
10-31-2011, 12:15 PM
#2
Mark
iTrader: (1)
What Back Spacing do the wheels have ??
10-31-2011, 12:24 PM
#4
Mark
iTrader: (1)
your good with 305/50
10-31-2011, 09:23 PM
#5
Senior Member
Thats a bad choice
They are going to stick way the heck out. It will look terrible IMO.
Stock offset is +44mm. So your going to move the wheel outboard 56mm not accounting for it being a wider wheel which will move the tire out even more. So your talking well over 2" sticking out.
Get the 20x8.5" wheels. The +10mm offset will get you 35mm more sticking out.
The +35mm offset will only get you 9mm sticking out.
I would probably get the +35mm with the wide 305 tire. Will keep it from sticking out too much.
The 10mm won't be bad but will definitely stick out a little bit.
I just ordered +15mm offset 8.5" wide rims but I will be running a narrower 275 tire.
They are going to stick way the heck out. It will look terrible IMO.
Stock offset is +44mm. So your going to move the wheel outboard 56mm not accounting for it being a wider wheel which will move the tire out even more. So your talking well over 2" sticking out.
Get the 20x8.5" wheels. The +10mm offset will get you 35mm more sticking out.
The +35mm offset will only get you 9mm sticking out.
I would probably get the +35mm with the wide 305 tire. Will keep it from sticking out too much.
The 10mm won't be bad but will definitely stick out a little bit.
I just ordered +15mm offset 8.5" wide rims but I will be running a narrower 275 tire.
10-31-2011, 10:00 PM
#6
I've got a 0 offset and they stick out about 1.5-2". I had to trim a little to get 305s to not rub. Some people will say nay to fender flares on a leveled truck but put some on if you think they stick out too much for you!
11-01-2011, 03:49 AM
#7
Member
Thread Starter
I was going to get the 8.5 untill I saw them in person, I think the rockstars look horrible without the concave look which is what led me to looking for the 10" that has a -24 offset.
Bjnewton1: do you have any pictures of how much yours stick out? I was looking at the death metal novakanes also. I love them on black and white but im not sure how it would look on my red truck.
Bjnewton1: do you have any pictures of how much yours stick out? I was looking at the death metal novakanes also. I love them on black and white but im not sure how it would look on my red truck.
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11-01-2011, 04:49 AM
#8
Senior Member
You have to take into account the width of the wheel when talking about offset. So, comparing a +44mm OEM to a -24mm 10" wide wheel isn't a straight up comparison.
The offset is calculated from the center line of the wheel.
If the OEM wheel is 8" wide, the 44mm offset is 44mm out from the 4" center line so 4"+44mm (about 1 3/4") = 5.75" of the wheel is inside the mounting face of the hub.
A -24mm offset on a 10" wide wheel is 24mm in from the 5 inch center line. So this puts approximately 6" on the outside of the mounting face of the hub.
This will not only cause your wheels to stick out excessively, it will also most likely cause excessive wear and tear on your steering components due to increased stresses.
The offset is calculated from the center line of the wheel.
If the OEM wheel is 8" wide, the 44mm offset is 44mm out from the 4" center line so 4"+44mm (about 1 3/4") = 5.75" of the wheel is inside the mounting face of the hub.
A -24mm offset on a 10" wide wheel is 24mm in from the 5 inch center line. So this puts approximately 6" on the outside of the mounting face of the hub.
This will not only cause your wheels to stick out excessively, it will also most likely cause excessive wear and tear on your steering components due to increased stresses.
11-01-2011, 10:42 AM
#9
Senior Member
^^^ What 10-Ford Said.
Check out this link (Scroll down a bit to the chart):
http://www.readylift.com/t-tire-calculator.aspx
This calculator might also help you out:
http://www.1010tires.com/WheelOffsetCalculator.asp
Check out this link (Scroll down a bit to the chart):
http://www.readylift.com/t-tire-calculator.aspx
This calculator might also help you out:
http://www.1010tires.com/WheelOffsetCalculator.asp
11-01-2011, 11:47 AM
#10
Senior Member
You have to take into account the width of the wheel when talking about offset. So, comparing a +44mm OEM to a -24mm 10" wide wheel isn't a straight up comparison.
The offset is calculated from the center line of the wheel.
If the OEM wheel is 8" wide, the 44mm offset is 44mm out from the 4" center line so 4"+44mm (about 1 3/4") = 5.75" of the wheel is inside the mounting face of the hub.
A -24mm offset on a 10" wide wheel is 24mm in from the 5 inch center line. So this puts approximately 6" on the outside of the mounting face of the hub.
This will not only cause your wheels to stick out excessively, it will also most likely cause excessive wear and tear on your steering components due to increased stresses.
The offset is calculated from the center line of the wheel.
If the OEM wheel is 8" wide, the 44mm offset is 44mm out from the 4" center line so 4"+44mm (about 1 3/4") = 5.75" of the wheel is inside the mounting face of the hub.
A -24mm offset on a 10" wide wheel is 24mm in from the 5 inch center line. So this puts approximately 6" on the outside of the mounting face of the hub.
This will not only cause your wheels to stick out excessively, it will also most likely cause excessive wear and tear on your steering components due to increased stresses.
You're right, there is no "stock" offset, but back spacing.