Gauging interest in rear hubcentric adapters for the 5 bolt folks. Why only 5-bolt you ask? Because Tangerine Racing already offers an adapter for the 4 bolt folks and I don't want to take away from Chris and all the great things he does for us.

Tangerine's 4 bolt rear hubcentric adapters can be purchased here: https://tangerineracing.com/shop/ols/produc...centering-rings

If you have a Porsche 5-bolt setup and are interested in hubcentric adapters, please reply to this thread. If there is enough interest, I will message everyone individually. I should be able to offer these for $75/pair shipped.

These will be machined out of 6061 aluminum

Why am I doing this? Well, I needed a pair so I designed my own and would like to give back to the 914world community.

This started out with a 3d printed "proof of concept" model shown below. Actual production versions will be machined out of 6061 aluminum which simply fit inside the rotor hat. These will be a clearance fit which may require time in the freezer to install depending on how clean, dirty or rusty your rotors are.

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Very cool.

Nice offer.

Can you comment more on the difference between Chris' 4 lug setup and yours?

Since there are a few options of the 5 lug conversion, which will it work with?

For example, I plan on using drilled /4 hubs and 914-6 rotors.

4x130 cars have a 78.6 center bore (this is what Tangerine offers)
5x130 six cylinder and converted cars have a 71.6 center bore (this is what I can make if there is enough interest)


Both of these fit any stock 914 or pre-1985 911 REAR rotor


Measure the center bore of the wheel that you are using. If it's a 5x130 Fuchs, then it is likely 71.6mm

OK! So difference is the the wheel bore ID, not the rotor ID where this piece will nest in. Got it.

I plan on using 16x6 Fuchs.

I'd be in for a set for my GT Tribute. Mark

I'm in!

This is critical if you're using bolts instead of studs.

After seeing the Tangerine units my thought was "Damn, I'm not going to be able to use those due to my 5-lug conversion".
My second thought was "I'm going to studs and it's not as critical."

Now I am...

Hub centric installations are much stronger than bolts/studs alone.

Thank you Tomeric914!

Thanks. If we can get at least 10 people interested, I'll start a link in the classifieds.

I want mine slightly interference fit so I have to polish/sand them until they fit in the rotor bores.

I want mine as tight as they can possibly be to my rotors (Setrab 914-6).

As the inner bore of the rotors is not critical different brands of rotors may have slightly different bores.

You might want to check a few brands of rotors to make sure there is not major differences.

Slightly too tight is fine with me...

I am good for a pair.

+1

great idea. put me down for a pair.

Incorrect. The inner bore of the rotor is a critical dimension (90mm). Later 911 models went hubcentric which is tight to the rotor.

Great!
They don't matter on a 914 hence my concern.

I restore old cars, not just 914s and have massive trouble with things like this.
I've recently done a 1989 Grand Wagoneer and almost every part was bought from a specialist "Team Grand Wagoneer".

Almost all the parts required some form of fabrication to install. Nothing was dead nut on.
The fuel pump required serious machining of the power steering bracket and made a 30 minute job into a 6 hour job.

Finished product machined out of aluminum. About 2 hours in the freezer and they tap right in. End result is no more vibration coming from the rear. 15+ years of fighting that vibration ended today!

Unfortunately not enough interest, so I probably won't make any more unless more chime in. My apologies to the 5 who expressed interest:

Alain V.
76-914
914Sixer
mlindner
technicalninja

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I’m in for a set if you make them

I'd be in for a set too.

Pete

I am also in for a set. #9
Now we need one more.

Matt

Up my order to 2 so that will put us over the top.

Well alrighty then! It'll take me about a week to get these made, so I'll send out payment info and get shipping addresses from everyone in the meantime.

Here's who I have:

Alain V.
76-914
914Sixer (x2)
mlindner
technicalninja
Montreal914 (I think?)
mate914
peteinjp
Nate W

If I have missed anyone, please let me know ASAP!

To be clear, these hubcentric rings are for 914 and 911 rear brake applications which fit the 90mm opening in the rotor. Hub centering rings go in the freezer for at least 2 hours and will tap in, expanding as they warm up to a snug fit. It is important that the surfaces be as clean and rust free as possible so the ring fits and sits flush. Use a wire brush, tooth brush and brake cleaner and a pick to get everything as clean as possible. Test fit was done on factory stock, off brand and Sebro rotors.

Outstanding!

Having to freeze the critters for install is what I want.

I'll up my order to two pairs as well.

Thanks
Rick

I will take a set please. Thanks you for doing those.

Please add me to the list for a rear wheel set.

Payment sent on two pair.

Thanks for making these!

Rick

I'll take a set ...

Thank to everyone who has paid already! I have messaged everyone with instructions who wants a set. Please check your IMs!

I have 12 sets being made which should be done in about a week.

Will these work on any 5 lug rear rotor?

"these fit any stock 914 or pre-1985 911 REAR rotor"

"Test fit was done on factory stock, off brand and Sebro rotors."

Spec on the center hole is 90mm. Rotor "hat" thickness is 7mm

So it wouldn’t be suitable for vented rotors ?

"these fit any stock 914 or pre-1985 911 REAR rotor"

911 rear rotors can be vented or solid. Both have the same 90mm hole and 7mm thickness. If you want to be sure, measure yours.

However, as long as everyone pays, I only have a limited number of these being made.

Someone asked if I would make a set of these for him a few months ago. I got as far as checking dimensions but no further. I haven't had a need to make more of my 4 cyl ones recently, and the lathe has been occupied with other projects almost continuously.
Still not sure if/when I'll get to it, so to you for running with it.

@tomeric914
I had a car fire weekend! I will get payment out tomorrow. Can I get two sets?
Matt

Yikes Matt! Hopefully nothing serious.

I have you down for one set and am only making 12 pairs total. If someone bails, or if I make another run, I can get you another pair.

Thanks Chris!

@mlindner
@Nate W

Please check your messages for payment info

@SirAndy

Please message me your shipping address

I missed this thread earlier on, is it too late to get in for a set? If it's not too late count me in!

Depends on if those who asked for one pay or not!

Parts should be completed this week. I will provide tracking to everyone who has paid once they ship.

If you haven't paid yet, see below...

I'll take a set if someone bails or you make more.
For future reference when making and selling parts, I watch the classifieds more closely than the garage, I'm sure I'm not alone:)

I have one set which I have not heard back from the person who said they were interested.

@mlindner if you are not interested anymore, please let me know and I will offer these up to @dug

I should have these by the end of next week to ship out!

Payment sent! Thank you

Received early! I will doublecheck dimensions on a few and get them shipped out tomorrow!

I'll do my best to forward tracking info via PM to those who did not supply an email address.

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Dropping off at USPS tonight. Check your PMs for tracking info!

Got mine!

These are the tightest centering rings I've seen.

Interference fit into brand new 914-6 Sebro rotors. Freezing them should work fine.

Tight fit into brand new Fuchs copies. Really tight!

I'm going to put something on them before I mount wheels, a bit of grease or maybe anti-seize.

They are close enough that any corrosion down the road will stick a wheel.

Bad-assed adaptors!

Better than I would have made.

I'm glad I purchased 2 pair.

Thanks, Tomeric 914!

You should build 100 of them, 50 pair.

You'll sell them all...

Got mine today! Very class service and parts! Came nicely wrapped with instructions.

Very happy!

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I didn't need to place the rings in the freezer, they went in slide fit. Rotors are Zimmemann.

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Thank you for doing these Tom!

Awesome! I'm glad you like them!


You're welcome!

I mounted a new set of 200 treadwear tires up and took the missus out for a ride in my 914. No exaggeration, but never in the 15 years I have driven this car has it ever been as smooth as it is now. One of those "why did it take me so long to do this" moments.

I have heard there is shrinkage from the cold. Has anyone measured it to see how much? @tomeric914 Will you be making more?

I'll take a set.

Most materials shrink (cold) and expand (hot). If they are both cold or hot, it's relative, so they expand or contract similarly at their own expansion rates. This adapter is held in place mechanically by the wheel so there is really no concern.

When these are put in the freezer, they will shrink by a few thousandths of an inch making them easier to install. Once they warm up, they are deigned to have an interference fit within the rotor center.

Will I make more? Possibly, if there is enough interest. Looks like there may be a couple interested already.