1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Anybody changed bolt patterns?

Old Jul 12, 2009 | 02:42 PM
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Anybody changed bolt patterns?

Since I can't get most wheels that I want for my car, I've started thinking about trying to change the wheel bolt pattern. The 4X100 that MX-5's have, would be a good pattern for almost any wheel made. I'm thinking it would be a matter of drilling the new bolt pattern at a 455 degree angle to the stock holes and elongating the holes in the rear disc. I haven't looked closely at the front yet but it should work about the same. Any ideas or (helpful) suggestions?
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Old Jul 12, 2009 | 03:27 PM
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What you can do is swap to the GSL-SE bolt pattern (4x114.3) which is much more common. Go to a junkyard or check the classified section here to find the parts you need. Do a search for SE suspension swaps for the How-To part. You could also buy the FC big brake kit from RE-Speed. More expensive but high quality parts, and it will set you up with a 5x114.3 pattern. This is however a pretty extreme upgrade as it includes changing over to FC 5 Lug brakes.
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Old Jul 13, 2009 | 02:42 PM
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4 x 100 is much more common, 4 x 114.3 is not available for all wheels.

OP, check my other post. https://www.rx7club.com/showpost.php...3&postcount=11 Have a set of custom wheel adapters made. You can choose whichever bolt pattern you want but I'd go with 4 x 100 as you'd have a larger selection.
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Old Jul 13, 2009 | 09:21 PM
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Cool, I'll read the post in a few minutes. The SE swap doesn't appeal to me because my "first gen" questions are actually for a Maxton rollerskate. It uses a-arm front suspension and first gen rear. I'd like to keep the weight down because the whole car weighs 1700 lb so the extra weight rear end would add mucho weight there.
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Old Jul 13, 2009 | 11:46 PM
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u can have a machine shop redrill the drums to the desired pattern.
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Old Jul 14, 2009 | 07:43 AM
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Originally Posted by rxtasy3
u can have a machine shop redrill the drums to the desired pattern.
I just did this this past weekend without taking them to the machine shop. I have a drill jig that bolts to 4x110 and then drill bushes at 4 x 4.5 (114.3). Worked quite well.

I may start to rent the thing out it others are interested.

-billy
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Old Jul 14, 2009 | 07:57 AM
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Originally Posted by bwaits_
I just did this this past weekend without taking them to the machine shop. I have a drill jig that bolts to 4x110 and then drill bushes at 4 x 4.5 (114.3). Worked quite well.

I may start to rent the thing out it others are interested.

-billy
I will have to do this on my Starlet but I dont know what the bolt pattern is on the wheels I have now, what thing I can tell is that they are not 114.3 for sure

When I measure them from middle stud to another stud across they measure around 4.75inch and I cant find a bolt pattern on the net with those measures.

One pic here for reference.

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Old Jul 14, 2009 | 10:01 AM
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since this is for a Maxton rollerskate (wtf?), your options seem endless if you have fabrication skills and tooks. however, there were only two different bolt patterns available for the 1st gen RX-7 and they've been mentioned. perhaps you might want to expand your options..
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Old Jul 14, 2009 | 11:48 AM
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make sure ur actually measuring it right. it's easier to put the 1 inch mark of the tape center of the hole, then go from there. there's info on the net on how to measure 4 lug bolt patterns. ok, found it. it's center to center straight across.

http://rockcrawler-mrt.com/boltpatternref.html

4.330 is 110mm in inches. .330 is between 5/16 and 11/32. 21/64 is .328, looking closer to ur tape, it looks like that's what u've got.

and yes bill, u and i and several others here can do the job needed without the use of a machine shop.
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Old Jul 14, 2009 | 05:13 PM
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Actually, it's usually tough to eyeball the center of a hole. You can always measure from the left side of one to the left side of the other.....

You can get hundreds of bolt-on wheel adapters on eBay. I've never needed to use them and I'd be a little wary of them, but they sure do make wheel shopping easy. I'm sure thousands of ricer kids buy them every day.
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Old Jul 15, 2009 | 10:13 PM
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Originally Posted by Crit
Actually, it's usually tough to eyeball the center of a hole. You can always measure from the left side of one to the left side of the other.....

You can get hundreds of bolt-on wheel adapters on eBay. I've never needed to use them and I'd be a little wary of them, but they sure do make wheel shopping easy. I'm sure thousands of ricer kids buy them every day.
I wonder about these adapters i want to try some but i want to know who has used them and how do they feel do your tires wobble,stick out too far , or even fall off...if they do work well i may get some just to have a wider choice in wheels...
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Old Jul 15, 2009 | 10:54 PM
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Originally Posted by Crit
Actually, it's usually tough to eyeball the center of a hole. You can always measure from the left side of one to the left side of the other.....

You can get hundreds of bolt-on wheel adapters on eBay. I've never needed to use them and I'd be a little wary of them, but they sure do make wheel shopping easy. I'm sure thousands of ricer kids buy them every day.
I'm not a ricer but I didn't go through eBay either. I did use a dial indicator to see if there's any run out, which there was not.

Originally Posted by SAVANT
I wonder about these adapters i want to try some but i want to know who has used them and how do they feel do your tires wobble,stick out too far , or even fall off...if they do work well i may get some just to have a wider choice in wheels...
I bought a set from Techno Toy Tuning, they've worked great so far.
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