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Quick wheel offset questions

Discussion in 'Wheels / Suspension / Tires / Brakes' started by CRX_m0nkey, Mar 24, 2004.

  1. CRX_m0nkey

    CRX_m0nkey Member

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    If I have a wheel with a 40 mm offset, and I need 42 mm offset can I use a 2mm spacer to make it work? or would this make the offset 38mm instead of 42mm?

    Offsets always confuse me :hmm:
     
  2. xkwzt21

    xkwzt21 Member

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    from my understanding of offset, adding a 2mm spacer to a 40mm offset will make it 38mm
     
  3. xj0hnx

    xj0hnx I wanna be sedated VIP

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    Offset is the distance from the center line of the wheel, to the mounting surface. So adding 2mm spacers to a postive 40mm offset is going to make it a 38mm offset, since you are moving the centerline closer to the mounting surface. Adding 2mm spacers to a negative offset is going ot make a -42mm offset. Hondas use postive offsets, so that is just a reference :)


    Areas in bold were corrected for information sake.
     
  4. CRX_m0nkey

    CRX_m0nkey Member

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    Awesome thanks guys, so I shoudl be able to run 42mm offest w/no problems if I use a 2 mm spacer w/ the 40mm offset?

    Also, is there any disadvantage to using a spacer?
     
  5. xj0hnx

    xj0hnx I wanna be sedated VIP

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    4x114.3 ITR rims have a 50mm offset, and I am going to be running 3mm spacers under them, so no there is no problem. Disadvatage would be if you are trying to tuck 8-15mm spacers under your Civics wells, then you would run into issues.
     
  6. SixtySecondAssassin

    SixtySecondAssassin Senior Member

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    xkwzt21 has it right, if you add a 2mm spacer to a +40 offset wheel, you'll have a +38 offset
     
  7. xj0hnx

    xj0hnx I wanna be sedated VIP

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    Yea, that's right, because you're moving the centerline closer to the mounting surface, duh.
     
  8. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Correct. I'm still rubbing with mine though- it's not the offset that's killing me, it's just how far out my tires are compared to the outer perimeter of the car. I'm running an effective +43mm offset but I still rub- I just need to raise the car a bit and then get new fenders that aren't caked up with Bondo.

    :lmao: :bawling:
     
  9. SixtySecondAssassin

    SixtySecondAssassin Senior Member

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    yea my +40 and Azenis rub like a bitch when i corner hard
     
  10. jwn7

    jwn7 Member

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    ok i'm confused. i just had a few people tell me to get wheel spacers to fix my rubbing. my wheels are 38 offset, i want to get that to 42. people told me to get some 5mm h&r spacers to fix that. but now you guys say that's actually gonna change the 38 to 33 right?

    i hate people who don't know and tell you wrong stuff :angry:
     
  11. xj0hnx

    xj0hnx I wanna be sedated VIP

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    SPacers will help you keep from rubbing on the inside, but the fender will be closer. Most of the shops here offer the service of pulling you fenders, and installing spacers, for that oh so euro look.
     
  12. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    :p :) :)

    Your Honda wheels have a positive offset, so that means that your hub surface is outside the center line of your wheel. Adding a spacer moves the center line of the wheel farther out (closer to hub surface), so you decrease your offset- not increase it. The offset is the measurement from the center line of the wheel to the mounting surface of your hub... so putting a 5mm spacer under a +38mm offset wheel will net a +33mm offset, while moving the entire wheel outboard another 5mm. If you're rubbing on the fender, that won't help you at all. If you're rubbing on the suspension, then it will help.

    Hope that clears things up for you a bit.
     
  13. xkwzt21

    xkwzt21 Member

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    so in essence, dont buy those spacers...they wont help you accomplish what your going for
     
  14. jwn7

    jwn7 Member

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    yes it did, thank you.

    god damnit i hate people who tell me wrong stuff. :angry: so is there any way i can get this 38 offset to 42? or should i just break out the hammer and baseball bat and go to town?
     
  15. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    If you want to get your +38 offset to +42, you can put the wheels on a lathe and machine 4mm from the mounting surface...

    :lmao:

    But you might not want to do that! The baseball bat and hammer might be the only easy option. You might try just raising up the car and pulling your camber in a bit- 1 degree makes a bigger difference than you might think, especially once you get to the top of the tire.
     
  16. pissedoffsol

    pissedoffsol RETIRED

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    remeber, wheel WIDTH is a huge factor in offset.

    +42 on a 6.5" wheel is NOT the same distance as +42 on a 7" wheel
     
  17. CRX_m0nkey

    CRX_m0nkey Member

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    oh ok, well the reason I asked is because of the other thread about falken azenis rubbing while turning. I believe you mentioned that 42mm was the right offset so that it won't rub. If its a 7" wide wheel what do you think it should be offset?

    Thanks to everyone for your help, I wanna make sure I won't be rubbing with the wheels and tires I get.

    btw. this is for a 90-91 CRX if that matters much.
     
  18. jwn7

    jwn7 Member

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    yup. i just read a bunch of stuff on wheels, alignments, and suspension geometry. now i know what's up.

    fuckin 14 year old kids on hondatech i tell ya :fr: just get wheel spacers y0 :angry:
     
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