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Bent rims: needing replacement

Discussion in 'Wheels and Tires' started by ghostrider, Jan 2, 2009.

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    ghostrider New Member

    Member Since:
    Dec 18, 2008
    I brought my car in for service when it began to vibrate, just a few days ago, at high speed. I am told that both left side rims have been bent and that the tires on rims rims have worn excessively due to those bends. I am told that the rims bent after hitting a pothole but I do not recall hitting a bump/hole in the road badly enough to bend anything! Is it possible that the stock rims are fairly fragile or that a different wheel/tire configuration would provide a more durable solution?

    To replace the two stock rims, two stock tires, and then mount, balance, and align them, it will cost $1600.00 at Toyota. I don't have 1600.00 to fix these problems, and I certainly won't have 1600.00 more if this problem were to resurface in the future for such a ridiculous reason.

    I have no intention on spending $302.00 per tire, seeing that I've already had one flat. I like the look of low profile tires, but if having low profile tires means severely compromising wheel structure under stress then I suppose I could live with standard profile tires.

    Also, I do like the look of stock rims, but I would not be opposed to buying different rims if I can find some aftermarket rims that retail modestly below the stock $390.00 per rim and are of equal or better structural and tensile quality than the stock rims -- as well as visually pleasing.

    In the end I am looking to do three things: 1) swap any overpriced component susceptible to damage for a less costly alternative, and 2) preserve the quality and safety of the vehicle by swapping one high quality component for another that meets the aforementioned criterion, and 3) prevent something like this from happening in the future (rims bending for such a petty reason) by swapping the current components for components meeting the aforementioned criteria.
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    ghostrider New Member

    Member Since:
    Dec 18, 2008
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    • Staff / Moderator

    navylife59 Super Moderator

    Member Since:
    Mar 22, 2006
    Location:
    2005 Scion Tc
    1. +45mm offset is a bit narrow on an 8" wide rim. That is the offset of the stock &" rim.
    2. 25lbs is about average weight for an 18" wheel. That is a bit heavy though for handling performance.
    3. $1600 is way too much for that much work. Sounds like you need to patron another Dealership. You should be able to but 2 used wheels that may even come with the tires.
    4. Better yet, time to upgrade to aftermarket.
    5. Factory wheels are very sturdy and light. It is possible to hit a pothole or drop ledge just so that the bead lip takes the punishment.
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    ghostrider New Member

    Member Since:
    Dec 18, 2008
    navylife59,

    Thank you for your reply. I am leaning toward a darker set of rims (like the second and third rim choices in my post).

    Basically I plan to buy the second set of rims: the 18x7.5 rim with a +42mm offset. Will that be the offset I need for that size wheel? And it is also constructed with a 1 Pc. Gravity Cast w/MAT Technology. Will that wheel be sturdy, durable, and reliable rim? Will I need to worry about pothole? The dealership says that a pothole cause my stock wheel damage but I don't see how anything I could've hit anything that would've bent my rims.

    I would buy the third set if I could buy I know nothing about them because I can't find them anywhere.
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    • Staff / Moderator

    navylife59 Super Moderator

    Member Since:
    Mar 22, 2006
    Location:
    2005 Scion Tc
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    ghostrider New Member

    Member Since:
    Dec 18, 2008
    So you would recommend against buying a 18"x7.5" because its offset of +42 is the offset I would need for an 8"?
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    • Staff / Moderator

    navylife59 Super Moderator

    Member Since:
    Mar 22, 2006
    Location:
    2005 Scion Tc
    You can use those, but you have to be careful on the width of the tire, the Series, and how lowered your car is. Too much negative camber and you can rub on the inside as well. The list of wheel offsets/widths are the optimum to run the widest tire per wheel without rubbing. If your offset is too positive,it changes the stance of your vehicle to a more narrow track. Cornering ability will take a hit.
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    ghostrider New Member

    Member Since:
    Dec 18, 2008
    Thank you for your reply. I don't want to do anything unless you think it'll work out problem free. So I guess I'm just, "waiting on your approval."

    Tenzo DC5v2 Charcoal Gray. 18x8, 5x100, +45mm, wheel installation kit

    What type of tire do I need to fit yet avoid pothole problems? (eg. Kumho Ecsta ASX, Blackwall, 225/40R18 or 235/40R18)

    I don't intend on upgrading the suspension but if the ride height increases with these wheels then I would consider changine things if I could do so without fitment/clearence/financial issues.
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    • Staff / Moderator

    navylife59 Super Moderator

    Member Since:
    Mar 22, 2006
    Location:
    2005 Scion Tc
    Check out this article from Tirerack.com.
    Tire Tech Information - Calculating Tire Dimensions

    As for what width tire that won't rub, you can easily determine this since the offset of the wheels listed are the same as OEM. Just take the section width of the tire and divide in half. Take this figure and make a measurement from the center point of your stock wheel towards the inside of the vehicle.

    Tire Tech Information - A Guide to Tire Sizes

    This is best done with the car on a lift. A frame lift will work to, providing more access, but will make measurements slightly less accurate. The same goes for work with a floor jack and jack stands. Doing this will allow you to determine if the tire width selected will fit without rubbing. Take note that if you lower your vehicle at a later date and don't correct the negative camber, then you make experince inner tire rubbing. Also, tire deflection from hard cornering or underinflation might cause rubbing if your within a few millimeters clearance.

    An 8" wide rim will require a 225mm to 235mm section width tire. Too narrow a tire and you run the risk or breaking the bead in hard cornering and damage to the unprotected lip of the wheel. Too wide and you will have sloppy, unpredictable handling. It is best to have a tire slightly wider than the wheel for best overall performance, protection, and looks. As you can see from this calculation, 225mm is the minimum with 235mm being a better fit.

    225mm / 25.4 = 8.86in
    235mm / 25.4 = 9.25in

    OEM tC on 17x7 wheel 215mm / 25.4 = 8.46in

    This means that my 225/40/R18 tires on my 18x8.5 Axis Super Hiro wheels are a step below the minimum section width to run. Thanks Axis for your +35mm offset and recommending this to make it barely fit with a fender shave. :WTFsmiley:What a-holes! :img21:

    From the first link above, you can determine any height (overall diameter) difference you will have with your new tire/wheel combo. Any differences over 3% will throw your speedodometer off alot.
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    ghostrider New Member

    Member Since:
    Dec 18, 2008
    FYI, I bought and purchased the Enkei LS-5 wheels with Sumitomo HTR+ tires. Everything seems to have worked our perfectly given the stock configuration. I will post pictures sometime later this week when I can.

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