If by chance, has anyone here ever used a 5x100mm rim on your sbp car? To be exact, there is 25.41mm in an inch. If this works, that would open up rim options enormously. Anyone know or try?

There have been many discussions about doing this. Let me put it this way. It will go on, but doesn't fit properly. It does raise some safety issues. Some have done it, but I wouldn't do it. Look at it like leaving stock 9 inch brakes on a Valiat/Dart that has a big block. Yeah, it will stop, but is it a good idea?

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

FWD 5-on-100mm wheels are not appropriate or safe for use on a RWD 5-on-4" vehicle.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I'm sure it's been done. I'm sure I don't want to do it.
The 100mm BC rims on 4" BC lugs lead to offcenter wheels, uneven stresses in the lugs and rims, false torque readings on the lug nuts, potential sudden movement between the rim and hub, etc.
Two other issues jump to mind: center registers compatibility, and offset issues. Many of the available 100mm rims are for FWD cars, with significantly more backspacing than we can use.

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

4" = 101.6mm, differnece of 1.6mm over the diameter. So that means each lug is 0.8mm off

Personal opinion here so don't blast me on it I'm not presenting it as fact.... but I would think 0.8mm is within manfuacturing tolerances. You guys wouldn't mind a used SBP rim right? I would think that over the years, removing/reinstalling lugs a few times would wollow the holes out more then 0.8mm each

Now the center register, backspacing, etc are deffinately valid isuses that need to be dealt with, but I don't think 100mm rims would be a huge deal.

Put it this way - if you have some that you want to try I would do it - but if your in the market for new wheels just for your own sanity and avoid any future "what ifs" stick with whats proper by the book.

What's going to happen is the first nut centers. Then the other side is off 1.6mm and you're out of round, plus 1.6mm is alot of stress.

Even .8mm is alot of stress for the bolt.

As for the seat taking the shape, well eventually. But the contact for each bolt hole will be about a 5-10 degree section on the inside. If the does wear, the bolts will get lose, and then you have a lost wheel problem


I'd only use a 5x100m wheel as a spare if that's all I had, and it wouldn't be on for long

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

If you tighten them all down evenly little by little, the hole will either take the shape it needs to or the metal will stretch. Remember metal is elastic to a certain degree and 0.8 mm is within the degree.....

When people redrill rotors or drums, do you think drill bits/presses/rigs have less then 0.8mm tolerance?

Like I said, if you already have the wheels or are getting them free go for it, otherwise I wouldn't bother.

This topic is in the same class as b body spindles on a bodies - some people think its voodoo, others have tried it long term w/o harm.

.8 mm is just a tad over .030... too much for my comfort. I wouldn't touch it with a 3.05 meter pole.

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David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.

No sale.

Show me some of these "others" who have tried it long term without harm. I want to see at least ten of them, and I want to inspect their cars and their wheels (and their driving records).

Until then: Absolutely not a safe thing to do.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

One problem is that tolerances can be plus/minus. The rim BC and holes have tolerances, the hub and lugs have tolerances, etc. Add some age and assorted machinery changes over the years, and we have a lot of variables with which to contend. Tolerance stackup, anyone?
There are assorted 5 on 4" rims available, and converting to the 5 on 4.5" pattern is not that hard. Using those sizes keeps the variables down, and lets me concentrate on the areas where I do choose to experiment.

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

I don't have any examples off hand and to be honest I haven't whitnessed any first hand, just seen some cases on line somewhere a while back.

I still wonder how the people that redril their rotors/axles/etc fair interms of tolerances.

I don't know about others, but when I redrill my hubs, axels, drums, I use a drill fixture, that is clamped to the part. It is a 1/2 inch thick steel plate, that has had the center hole and the 5 bolt holes machined into it on a "jig bore machine". This machine can hold tolerance to .0001 inch. The bolt holes in the fixture, have "drill bushings" installed. These are hardened tool steel bushings that press into the holes in the soft steel and guide the drill bit, but prevent wear to the holes in the plate. I use a drill press for the drilling. I made this fixture back about 1982, when I worked as a tool and die maker.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Check out the manufacturer's tolerances for drums and rotors; you'll find that they are way tighter than .030 in every dimension. I know a lot of people (myself included) have done a lot of foolish things and gotten away with it but that doesn't make it safe or wise.

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David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.

A neighbor and I have parted out a few old Mopars and 2 of them had metric wheels on them 5x100mm to sum it up these wheels DON'T FIT correctly. The wheels were on the rear and they would not fit over the front drums, they dont center correctly on the axle, the offset is wrong and of course the studs are in the wrong place. We have used these wheels to tow the cars to the junk yard, thats it.

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1966 Signet
Turbo Slant Six

I origionally asked this because I remember at the good guys show at infineon raceway, I saw a really nice 64 sbp wagon with some 5 spoke tuner looking rims on it. I dont mind that flat look, as I dont mind the deep dishes. Anyways, I've havent found too many places that sell rims with a 5x4'' circle. Any links?