- Location
- Lafayette, California
True, but if you run rocks in the Sierra range, you won't have those pretty aftermarket flairs after you run your first 100 yards
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Rim backspacing suggestions
- Thread starter RyanM
- Start date
codyj86
NAXJA Forum User
- Location
- co springs
ty20404 said:
this makes sense, but at the same time, why wouldn't more than 4" (on a 8" wide rim) do the same? it's still moving the leverage point away from the center right? so stock rims are 5.25 on a 7" wide, so in essence, there is 1.75" if the rim were flipped? I'm not saying id run a rim with 1.75" bs. But i would like 3.5". but nobody seems to make them as cheap as the soft 8's with 4in bs.
btw: my freind runs 31 mtrs on soft's 8's 15x8 4" bs. no rub on anything.
- Location
- Hammertown, USA
RCP Phx said:
5.25"
- Location
- Hammertown, USA
ty20404 said:
The added stress is very minor though; not really a big factor.
RCP Phx
NAXJA Forum User
- Location
- Phoenix,Az
That is definately incorrect(did you see the previous post)!Alot of the confusion is where people measure from.Wheels need to be measured based the tire beads, not the outside edges(which very greatly depending on steel vs alloy and other things).Spoke with a workmate today who has a Rubi,he still insists that they are 4.5-4.75" based on the info I just stated.My factory 16's measure out at 5".cal said:
- Location
- Hammertown, USA
RCP Phx said:
The paperwork I read at the dealership said 5.25". That page says 5", your friend says 4.5-4.75". I admit that having googled it just now, most sites *DO* say 5". I may have been wrong - but then, so was the dealer (not like it would be a first time..).
-C
- Location
- Bakersfield, CA
ty20404 said:
Not really an issue. On an 8" rim 4" backspacing would put the wheel mount surface right in the middle of the wheel. The stock backspacing is 5.25" which isn't close to the center on a stock 7" rim. The center on a 7" rim would be 3.5" backspacing, so the 5.25" stock backspacing is 1.75" off the center.
Really, excess wear on the hub/unit bearing is a non-issue with any backspacing. We all pretty much run 8" rims with backspacing anywhere from 3.25" to 4.75", which is .75" off of center or less. That's less than half the amount that a stock rim is off center. It's a non-issue.
TunaSoda
NAXJA Forum User
- Location
- Douglas, MA
Goatman said:
Technicaly, an 8" rim with 4"bs would put the flange off-center by 3/16"
RCP Phx
NAXJA Forum User
- Location
- Phoenix,Az
You must be using "fuzzy" math,last time I checked half of 8 was still 4!TunaSoda said:Technicaly, an 8" rim with 4"bs would put the flange off-center by 3/16"
TunaSoda
NAXJA Forum User
- Location
- Douglas, MA
RCP Phx said:
Yeah, if your mounting flange is 0" thick...
BS is measured to the inside edge of the flange, not to the middle of it
Russ Pottenger
NAXJA Forum User
- Location
- West Covina, California
I agree with Richard, and to what I think is a bigger point.
Aside from the obvious, like when extreme backspacing is causing physical limitations, like tires prematurely rubbing control arms.
We start losing our perspective when we 1" to much and the cause the hubs to wear out in 10K miles, and 1" to 1.5" variation in lift is the difference between a low center of gravity rockcrawler, and a gay mallcrawler.
Aside from the obvious, like when extreme backspacing is causing physical limitations, like tires prematurely rubbing control arms.
We start losing our perspective when we 1" to much and the cause the hubs to wear out in 10K miles, and 1" to 1.5" variation in lift is the difference between a low center of gravity rockcrawler, and a gay mallcrawler.
RCP Phx
NAXJA Forum User
- Location
- Phoenix,Az
The thickness of the wheel center has nothing to do with it,some alloys have a 1" web.A 8" wheel w/ 4" backspace is exactly centered!
TunaSoda
NAXJA Forum User
- Location
- Douglas, MA
RCP Phx said:
Say the flange is 3/16" thick and it is dead center in the 8" rim
It's mounting face to the bead edge would be 3.90625" not 4"
A rim with a 4" bs would put the flange .09375" off center
RCP Phx
NAXJA Forum User
- Location
- Phoenix,Az
Your math is good,but thats not how they measure backspace,its measured from the WMS!TunaSoda said:
codyj86
NAXJA Forum User
- Location
- co springs
dear god.... who cares. you're arguing over a frickin 3/16" i don't think thats going to make to much of a difference......
TunaSoda
NAXJA Forum User
- Location
- Douglas, MA
codyj86 said:
Actualy, I'm arguing over 3/32"
Backspace is measured from flange face to bead edge, is it not?
codyj86
NAXJA Forum User
- Location
- co springs
ok, i stand corrected......
36 12.50 R16 tsl radial mud terrain on 16x8 AR's with 4.5" bs.
38 12.50 R15 tsl/sx bias on 15x10 just for comparison.
My 36's in same tire on 15x8 3.5b.s. stuck out too far for legal status, w/ no flares.
The rear needs to be lowered, and I'm gonna lower it a little overall.
I like the look of the AR rims and the bs. I was tired of the black rims and my tires don't stick out illegally.
Raised spring perch with 1" block. - losing the blcok
38 12.50 R15 tsl/sx bias on 15x10 just for comparison.
My 36's in same tire on 15x8 3.5b.s. stuck out too far for legal status, w/ no flares.
The rear needs to be lowered, and I'm gonna lower it a little overall.
I like the look of the AR rims and the bs. I was tired of the black rims and my tires don't stick out illegally.
Raised spring perch with 1" block. - losing the blcok
