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tires: 32's rear, 33's front

Discussion in 'Intermediate CJ-5/6/7/8' started by Strider380, Jan 10, 2007.

  1. Strider380

    Strider380 Can I have a zip tie?

    I got a little gash on the sidewall of my 33. City tire tells me they can't fix it, so immediatly I thought about putting the 32's from my m38a1 on. I realized my 32's arn't balanced and also they have a ton of beef (tread), and I'd like to keep it that way. I thought about putting the 33's up front since I don't care if they wear down, plus they're balanced. I've run bigger tires in front on my van for years. Then my friend told me, it's a big no-no and on 4x4 vehicles, you need 4 tires the same size. ???? Is this a must?
     
  2. JeepTherapy

    JeepTherapy Sponsor

    Running tires of different sizes front to rear on a 4 wheel drive is a no no. It will bind up the drive train and eventially break parts.
     
  3. Boyink

    Boyink Super Moderator Staff Member

    I'd measure them overall first - they may be closer than you'd expect. I know same diameter side to side on 4x4's with limited slips and lockers is important. Not sure front to rear. Seems like when you're in 4WD you'd be on driving conditions that would allow for a bit of slip anyway - which would prevent bindup.
     
  4. jd7

    jd7 Sponsor

    If you want to put it in four wheel drive and your front and rear axles have the same ratio. Tires need to be same/veryclose to the same dia. Measure your tires and if by chance they are very close to the same diameter(different mfg differ sometimes)you'd have a better chance of getting away with it. Ford got away with it with 4.09 and 4.10 ratios in the early Bronco's. Where it is really critical is on a hard non slipping surface.hth
     
  5. scott milliner

    scott milliner Master Fabricator

    Yes you must use the same size tires. Have you ever tried to drive in 4wd on hard pavement? Even with the same size tires the Jeep running gear binds up. I don't know what would happen if you had miss matched tires.:shock:

    Not a good idea. Now if you only run in 2wd. I don't see a problem.
     
  6. karlvin08

    karlvin08 I R SMRT

    I would say go ahead and measure them first. If it is close I would say run it. You could even run a little less air in the 33's to bring the loaded radius down a bit to even it out.
     
  7. Strider380

    Strider380 Can I have a zip tie?

    There is an inch difference. Thank you for your opinions. Most of the driving in the next few days will be 2wd. I think I will leave them on for now and try again to get the blown tire fixed. Won't be too long. I'll leave it out of 4 wheel drive and if its needed, it will obiviously be able to slip. Once again thanks for your opinions. Its nice to know my idea's arn't completly unthought of.
     
  8. Chuck

    Chuck Sponsor

    If it were me I wouldn't repair sidewall damage.
     
  9. Strider380

    Strider380 Can I have a zip tie?

    Yea, thats what the survey says. My dad was a foreman of the city garage and anytime he needed a sidewall fixed on a truck, they'de have it vucanized no problem. Apparently noone does this anymore...or has even heard of it. Must be a liability thing
     
  10. Strider380

    Strider380 Can I have a zip tie?

    I've been reading alot of websites on how to patch your sidewall well enough to get home. One website tho, showed how to get the tire off the rim to patch it or put in tube. The patch sounds kinda iffy but the tube sounds like an excellent idea! No????
     
  11. Rondog

    Rondog just hangin' out

    Jeez man, you're cheaper than me! Just buy a new tire.
     
  12. SwampRatt

    SwampRatt 1973 CJ-5

    Heat buildup is a issue with tubes.
     
  13. Strider380

    Strider380 Can I have a zip tie?

    well one tire means two tires which means $400. If I could fix it for $30 to ride trails for another day...
     
  14. Glenn

    Glenn Kinda grumpy old man Staff Member

    Any more than 1/4 inch difference in diameter and you can start to experience driveline bind, even with open diffs.
     
  15. LostDawg

    LostDawg Slowly rusting in the NW

    Also, isn't there something about needing a radial tube if you're running radial tires?
     
  16. jeepdad

    jeepdad Member

    i wouldnt run different size tires if your going to use your jeep alot on city streets. but if your just going to trailer the jeep to a mushy trail to have fun, then it should be ok.
     
  17. Strider380

    Strider380 Can I have a zip tie?

    What would happen with them on city streets with the T-case in 2H ?
     
  18. CAP

    CAP Fresh out of the clam.

    I'm running different sized tires on my truck :D . 265/75 vs 245/75 or something like that. Pretty squirlly and bucky driving down a snow covered road in 4wd. It's constantly breaking traction...
     
  19. CAP

    CAP Fresh out of the clam.


    It won't handle any differently than it did before.
     
  20. w3srl

    w3srl All-around swell dude Staff Member

    I'm surprised that nobody mentioned the obvious; different-sized tires on F & R axles are also going to wear all of the tires faster when in 4WD since the axles will be constantly fighting each other.