April 12, 201213 yr Author when you say 13", is that size of the wheel, or is that the distance from the center hole to the inner lip of the wheel? 13" diameter wheel (Stock size) 13" wide wheels! OMG.... That would be nuts on a Subaru haha.
April 13, 201213 yr ok so i understand what back spacing is, but what is offset? and what do you have to look for when picking out a set of wheels to make sure that they wont interfere with brake components? so what im asking is what do i look for to make sure that the surface the lugz go through or the spokes dont rub on the caliper's. ive seen it happen in other custom situations
April 13, 201213 yr Author Ah, I get what your asking. I don't really have an answer for that. I guess if I were looking at wheels, I'd look at the lug seat/surface and how the spoke would interfere if at all. Somebody else will chime in.
April 13, 201213 yr IMO Offset is another word for Backspacing. (At least thats what I go by) As long as you go bigger then 13", nothing will interfere with the brake system, Calipers, Rotors and or Drums will all clear. Width will be the only issue, may hit the Spring perch or Strut body, Possible rubbing on Tierod end. But you can run a pretty wide tire on these. Incorrect. Offset is the distance from the centerline of the rim of the wheel, to the wheel mounting surface(The surface up against the wheel hub/brake drum when it's mounted.) It's negative when it's closer to the outside lip, and positive when it's closer to the inside. EXAMPLE: My 14x6 Pug alloys have 4.5" of backspace. The centerline of the 6" wheel is 3" across. 3"-4.5"= -1.5" This implies that they also have 1.5" of negative offset. The "real" formula for calculating offset is as follows: (Wheel width/2)-(Backspace)=Offset
April 13, 201213 yr Incorrect. Offset is the distance from the centerline of the rim of the wheel, to the wheel mounting surface(The surface up against the wheel hub/brake drum when it's mounted.) It's negative when it's closer to the outside lip, and positive when it's closer to the inside. EXAMPLE: My 14x6 Pug alloys have 4.5" of backspace. The centerline of the 6" wheel is 3" across. 3"-4.5"= -1.5" This implies that they also have 1.5" of negative offset. The "real" formula for calculating offset is as follows: (Wheel width/2)-(Backspace)=Offset Nice work buddy.... You're such a sexual intellectual..... (effinknowitall) :-p
April 13, 201213 yr Nice work buddy.... You're such a sexual intellectual..... (effinknowitall) :-p Don't hate man. when you going to let me come down and help you work on the beast huh? Plus i gotta give you a list of parts to dig out of the barn!
April 13, 201213 yr hey "wentz912" thanks for the information, me and mr. loyal leared something there. so then what is back spacing?
April 13, 201213 yr hey "wentz912" thanks for the information, me and mr. loyal leared something there. so then what is back spacing? Backspace is still just the amount of SPACE from the BACK lip of the wheel to the wheel mounting surface.
April 13, 201213 yr so effectivly is back spacing really just offset + other half of the rim. i get it i just dont understand why they need both measurements
April 13, 201213 yr so effectivly is back spacing really just offset + other half of the rim. i get it i just dont understand why they need both measurements Maybe this will clear it up for you... http://www.streetdreams.org/tech.php
April 13, 201213 yr Author Ah, I understand that now. Finally got that cleared up after 2yrs! Good posts, thank you.
April 13, 201213 yr so effectivly is back spacing really just offset + other half of the rim. i get it i just dont understand why they need both measurements Yup pretty much. You can get the other number, no matter which one you have. I usually see backspace always measured in inches though, while offset can be either inches or mm.
April 13, 201213 yr idk probably like a weekend/hunting wheeler. so does the size of the tire have anything to do with the with the width of the rim?
April 13, 201213 yr Yes, you never want the tire size to be narrower than the wheel width. the closer to the wheel width that your tire is, the less "bubble" the tire will have.
April 13, 201213 yr so if i put a skinny tire on a wide wheel it wont fit, and if i put a wide tire on a skinny wheel it will bubble.
April 13, 201213 yr Author so if i put a skinny tire on a wide wheel it wont fit, and if i put a wide tire on a skinny wheel it will bubble. If you put a skinny tire on a wider wheel, it willl bow or pull out the sides, a tire shop will not mount a tire that is to much narrower then the rim, as it is a lot of stress on the bead. You can mount a wider tire on a less wide rim, it will protect the bead lip more if offroading (I see this all the time on offroaders)
April 13, 201213 yr Author As you can see here, the wheel bead is sunken into the tire more, so there is more rubber sidewall to protect the rim from rocks ect. Also like this, the wheel is a 15x7 but it is a 10.5" wide tire. You can also run a 12" wide on the same 15x7 wheel.
April 13, 201213 yr It's also a royal pain in the butt trying to mount a tire that's considerably thinner than the rim. After dealing with that a few times while working at a garage, I started refusing to do it. It was a lot of VW crowd wanting sidewall stretch... sigh...
April 13, 201213 yr Author Eww, why? I like a tire with nice sharp square lines. Stretched sideways give me the hebbie jebbies..
April 13, 201213 yr Eww, why? I like a tire with nice sharp square lines. Stretched sideways give me the hebbie jebbies.. Because STANCE I don't get it... merely relating what I've dealt with working at a shop.
April 13, 201213 yr Author VW=Stretched tires and Hellaflush. Just the culture. I could think of a few better things to do with a VW
April 13, 201213 yr I could think of a few better things to do with a VW They're good for rallyx, and with good suspension and tires they handle pretty nice. Same goes for hondas and all the other ricer mobiles.
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