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What size wheels for 40mm and 50mm over fenders

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Old 09-24-22, 02:53 PM
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What size wheels for 40mm and 50mm over fenders

Have a 88 FC and bought a BN kit and 40mm front over fenders and 50mm rear over fenders just wondering what size wheels would work best? Can’t find much info about this

Was looking at some 18x9.5 +15 wheels for the front and 18x10.5 +22 or +15 wheels not sure how they would fit or how much spacer I would need to get good fitment, or should I try to find lower offset wheels?
Old 09-24-22, 04:16 PM
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Its not that simple.....

1. establish what look you're going for or what you're using the car for. If doing stretch/camber/hot boii stuff then you're specs are going to be way different than a "normal" fitment.

2. Find whats flush on a stock body fc. The specs of whatever wheel are flush on a stock body car will give you the starting point for how to find what will fit with such huge fenders.

3. Once you have found what #2 is then you're going to use will they fit dot com to do some calculations. There are quite a few derivatives of a certain wheel spec that will achieve the same fitment. For example..... on an fd you can get the same fitment in the rear from a 10+50 as a 9+15. The width and offset only change whats happening on the inside of the wheel well........ in this example. In addition to the 9+15 there a million other derivatives that give the same fitment.

because your fenders are +50, you're going to take that number and SUBTRACT it from the offset. Ultimately the goal is to make up that additional 50mm in the wheel. You can do it entirely by offset or a combination of width AND offset. every J on a wheel is ~1in and 1in=24.5mm.

So your krabby patty formula is: stock fender flush fitment spec - 50mm if calculating by offset only or +50mm if calculating by width only. If splitting it between the 2 then you'll just math it out.

Your ultimate restriction is what wheels are available on the market. Unless you're getting custom wheels made then youll have to just see whats available and find what derivative is closest to that.

I don't advise using bolt on spacers although pretty much proven to be just fine. Keep in mind using a spacer gives you some fine tuning ability. A slip on 5mm or 10mm all the way up to bolt on 50mm. Theres a HUGE range of thiccnesses 😎 to get the wheel just right where you want it. Just don't go too crazy because you still have to account for the tire and ride height....

It can be pandoras box if you want it to be. Just have to decide what you want and go from there. Everything above is just for the rear.... the front is a different animal because those wheels have to move 😅😅 same logic applies but you have to be mindful of clearances with the suspension and the body
Old 09-24-22, 06:30 PM
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Originally Posted by cr-rex
Its not that simple.....

1. establish what look you're going for or what you're using the car for. If doing stretch/camber/hot boii stuff then you're specs are going to be way different than a "normal" fitment.

2. Find whats flush on a stock body fc. The specs of whatever wheel are flush on a stock body car will give you the starting point for how to find what will fit with such huge fenders.

3. Once you have found what #2 is then you're going to use will they fit dot com to do some calculations. There are quite a few derivatives of a certain wheel spec that will achieve the same fitment. For example..... on an fd you can get the same fitment in the rear from a 10+50 as a 9+15. The width and offset only change whats happening on the inside of the wheel well........ in this example. In addition to the 9+15 there a million other derivatives that give the same fitment.

because your fenders are +50, you're going to take that number and SUBTRACT it from the offset. Ultimately the goal is to make up that additional 50mm in the wheel. You can do it entirely by offset or a combination of width AND offset. every J on a wheel is ~1in and 1in=24.5mm.

So your krabby patty formula is: stock fender flush fitment spec - 50mm if calculating by offset only or +50mm if calculating by width only. If splitting it between the 2 then you'll just math it out.

Your ultimate restriction is what wheels are available on the market. Unless you're getting custom wheels made then youll have to just see whats available and find what derivative is closest to that.

I don't advise using bolt on spacers although pretty much proven to be just fine. Keep in mind using a spacer gives you some fine tuning ability. A slip on 5mm or 10mm all the way up to bolt on 50mm. Theres a HUGE range of thiccnesses 😎 to get the wheel just right where you want it. Just don't go too crazy because you still have to account for the tire and ride height....

It can be pandoras box if you want it to be. Just have to decide what you want and go from there. Everything above is just for the rear.... the front is a different animal because those wheels have to move 😅😅 same logic applies but you have to be mindful of clearances with the suspension and the body
Yeah looking for pretty much flush fitment with minimal camber maybe a few degrees but definitely don’t want wheels that are on a huge angle and stuff

But I kinda get what your saying with the math part of it, find flush fc wheel specs subtract the overfenders width from offset or add 24.5mm for every inch wider of wheel I go and try to end up with 50mm more then flush fitment between the two or if splitting it with offset and width add the two together?

But was kinda set on the wheels I found since I’m pretty sure they’ll look real good on the car
Old 09-24-22, 06:42 PM
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Originally Posted by CasperTZE
Yeah looking for pretty much flush fitment with minimal camber maybe a few degrees but definitely don’t want wheels that are on a huge angle and stuff

But I kinda get what your saying with the math part of it, find flush fc wheel specs subtract the overfenders width from offset or add 24.5mm for every inch wider of wheel I go and try to end up with 50mm more then flush fitment between the two or if splitting it with offset and width add the two together?

But was kinda set on the wheels I found since I’m pretty sure they’ll look real good on the car
your understanding is correct yes. dont take splitting literally as in 50/50, you can divvy the distance up however you want. just depends whats available. if you found a wheel you like thats 3pc then you can re-lip or re-barrel it to suit the desired specs. youll have to talk with the wheel people for that since the face has quite a bit of impact on doing that and i dont know how to calculate for that.
Old 09-24-22, 07:04 PM
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^^
all of the above advice.

But, I will add it will be much better to cut the car up 1st and get the body kit on and measure from your existing wheels to take the guesswork out of it.

Get the wheels coming to you while the body is in paint.
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