titanle

so after waiting almost 4 weeks for my wheels, I ended up filing a PayPal dispute because the seller stopped responding after promising a 2 week turnaround. I’m guessing they weren’t able to get the wheels because they refunded me the day after I filed the dispute.

I already bought a set of 295/40/18 tires and I was looking at the team3 wheels which come in 18x10 or 18x12 for the cheaper one piece cast option.

Can i fit 12” on a 295 tire?

cagotzmann

Acceptable range is 10-11.5 inches but I know many people have used wider tires on narrow rims and also done the reverse. But the 295/40/18 are 27.2" dia which may give you problems on the front at full steering lock. But you will need to get the Backspacing correct to make sure you don't have any interference problems. Also you will need ~ 1" for factory caliper spacing. I would go with a minimum of 1 1/8" caliper clearance to allow for bigger brakes in the future. You will need fender flares unless you have enough Backspacing and have modified the rear tailing arms to allow for the additional BS.

In the rear with no modifications you can safely use 4.75" BS and some have been able to use 5 - 5.5" BS but requires 1 mod to move the parking brake support.

You may also have problem with clearance if you have a rear sway bar installed.

What year is the car ? Assuming its a corvette, if not then the above doesn't apply.
What Backspacing are you going with ?

titanle

cagotzmann

Which Wheels are you going with. ?

If you are selecting the 1 piece wheel only then are you limited to Backspacing. I would not use adapters if you have the option of getting the correct wheels from the start.

If you are going with the adapter option this would only be if you are not 100% sure what you need ? getting different adapters (trial and error) .

I went with a 3D model to find the correct settings for my setup.

titanle

I want to get the ET mags LT III in 18x10 cast 1 piece option. This wheel is 6.25" backspace and is $375, the 2 piece option gives 4.25"-3.5" backspace and is $529. A set of adapters from motorsporttech will cost me around $300. Getting the 2 piece wheels will cost me $616 over the cost of the 1 piece.

Im thinking to get the 1 piece wheels, mount them on the car, then measure how much space I have from the tire to the edge of the flare and order a set of adapters accordingly.

cagotzmann

I have LT III 18 X 9.5" Wheels with 1 1/8" Caliper clearance & 4.75" BS This clears all the factory Rear suspension parts without modification. This is what it looks like with 275 40R 18" tires in the rear.




Can you send me measurements from the wheel flare to the top & bottom of the rim, and what wheel specs you currently have. Width, Dia , Backspace. I would like to see how this measures in 3D. But if your flares are 2" beyond the factory flare you would need a wheel with 11.75" Width and a 4.75" Backspace to look similar to my picture.

With a 11.75" 6.25" backspace wheel you would need a 1.5 spacer and a 3.25" spacer with a 10" wheel 6.25" backspace.
to move that wheel 2" outward.

cagotzmann

See if a local tireshop can loan you a wheel with 6.25" backspace or something close to see what you will need. Also I am surprised the someone with flares and big wheels all around hasn't said what their wheel specs are. I have seen many C3 with flares and very wide wheels.

titanle

The other wheel I saw is the Rocket Racing Attack which may fit better than the LT III. The specs for this wheel in a 18x10 is as follows:

TTR16-81614518x10, Attack Hyper Shot Painted Center / Machined Outer, 5x4 3/4 bolt pattern, 4.50" backspacing, -25.3 offset
TTR19-81615018x10, Attack Hyper Shot Painted Centre / Machined Outer, 5x4 3/4 bolt pattern, 5.00" backspacing, -12.6 offset

So based on the previous comment of needing a 3.25" spacer on a 10" wide wheel with 6.25 backspace, with the Rocket Racing Attack 10" wide 4.5" backspace I would need a 1.5" spacer to get it as far out correct?

cagotzmann

I am guessing at how much your flares are beyond the factory flares.

Lets work backwards and get a better picture of what you need. Measure your current wheels. provide current width and Backspace. Then measure the distance the wheel is from the flares top and bottom of the wheel. We can then get a reasonable requirement.

I don't think 10" wheel will look correct on the back of the car. Also you need to make sure once the wheels are mounted that you get the correct caliper clearance. This will be influenced by the spoke design of the wheel. You need a minimum of 1" from the mounting surface of the rotor.

titanle

I will take those measurements when I get home today (I was too busy yesterday installing the led bulbs lol). I don't know what the current wheel width is, I'm assuming they are 9-10" on 265-50-15 tires. I know that 12" wheels would be the best option for the rear but I already bought a set of 295-40-18 tires and that's pretty much limited me to 10-11" wide wheels.

**Just spoke with a rep at rocket racing and the tech sheet indicates 1.95" of caliper clearance on that particular wheel.

titanle

titanle

Here are the measurements according to the youtube video. Looks to be just over 4" BS with a .25" spacer. The tire appears to be dry rotted, is that even safe to drive on?