Spacers anybody?

[kitkat]

I’ve got a set of the 12mm spacers supplied by the UK company. I believe they are also manufactured in the UK.

A famous Chinese brand (Bonoss) quite recently started supplying some spacers for the Emira. Their stuff is good quality and nicely finished, but are quite different in design and finish compared to the UK supplied spacers I have.

I originally went to Bonoss to get some 12mm made as they listed theirs on their website as in stock for the Emira. A week went by and they started emailing me asking for what car, to make all sorts of measurements for them and that it would be an up charge for custom spacers even though they were listed on their site. Turns out they had never made them before and the final price would be considerably more expensive and then took 2 weeks and 5 emails to return my money.

I have PCD on my car now and those work fine but if I were in the market now I’d stick to Greg since he makes 12mm spacers.

 

[DriverMod]

We have 12mm spacers in stock!
We also keep the extended bolts or stud kits in stock to accommodate the spacers install.
Silver or black to match your wheels.
https://www.gregsraceparts.com/coll...ts/new-grp-12mm-wheel-spacers-for-lotus-emira

Do you plan on carrying aftermarket titanium lug nuts with floating seats like OEM does with the lug bolts?
That’s the only thing holding me back from your 12mm spacers; I want titanium studs/nuts but also want floating seat lug nuts.

 

[GRP]

Hi GRP. Just ordered those so hoping 12mm on stock height isnt too much. . I put a decent size order in along with Titanium studs and nuts. Whats the lead time on those?

We have everything except your intake kit ready to go.
The intakes will be back in stock in two weeks so we will get it all sent out when that's ready!

 

[GRP]

Do you plan on carrying aftermarket titanium lug nuts with floating seats like OEM does with the lug bolts?
That’s the only thing holding me back from your 12mm spacers; I want titanium studs/nuts but also want floating seat lug nuts.

I'll look into it and see if one of our vendors has them available already.
Fwiw we havent had an issue with our current titanium stud kits which are made here in the U.S.

 

[DriverMod]

I'll look into it and see if one of our vendors has them available already.
Fwiw we havent had an issue with our current titanium stud kits which are made here in the U.S.

10-4 thank you

(I just really like floating seat lug nuts)

 

[crestima]

PCD is a brand as well as a general term used with wheels and associated parts meaning "pitch circle diameter" So when they say PCD 5x114.3 that just wheels the wheel bolt pattern.

Thanks for the clarification Greg. Admitedly, I had never heard of that technical term. What a coincidence that it's acronym is the same as the UK company's "Professional Custom Design".

 

[Golden Parrot]

does anyone know if there are 5mm or 10mm spacers that are also hub centric? I know the 12mms are hub centric, but I don't want the wheels out that wide.

I got these. 2x5mm. no vibrations at all

Spurverbreiterungssatz Emira V6 10/10mm

Spurverbreiterungssatz Emira V6 10/10mm

www.komo-tec.com

 

[jimgraham]

Lowered by 25mm and spacers from GRP.

 

[JimBo1953]

Perhaps someone could explain the meaning of hubcentric? From the posts here, I totally understand the need for them to be this way. However, would be helpful to also have an understanding of the term. Also… surely all spacers are gonna be made hub centric?

 

[kitkat]

Perhaps someone could explain the meaning of hubcentric? From the posts here, I totally understand the need for them to be this way. However, would be helpful to also have an understanding of the term. Also… surely all spacers are gonna be made hub centric?

Hubcentric here means that the interface between the wheel and the hub interface is restricted to a single axis of movement: sliding the wheel on and off. This restriction helps with any imbalances that induce wheel shake.

Wheel spacers themselves can fit on the hub lip and be the same ID as the hub lip OD, but that doesn’t mean the spacer preserves the hubcentric lip to the wheel interface. In fact that’s what non hubcentric wheel spacers ruin: the hubcentric wheel interface.

So along come wheel spacers that have their own hubcentric lip extension that extends the original hub’s lip and preserves the hubcentric interface to the wheel.

Hopefully this makes sense? These spacers should really be called “spacers with a hub centric lip extension” but that’s a mouthful.

This also explains why some thinner spacers like 4mm don’t need a hub centric lip extension, because there’s still enough of the original lip poking through to support the wheel interface. The width of spacers we typically desire leaves almost no lip left.

 

[JimBo1953]

Hubcentric here means that the interface between the wheel and the hub interface is restricted to a single axis of movement: sliding the wheel on and off. This restriction helps with any imbalances that induce wheel shake.

Wheel spacers themselves can fit on the hub lip and be the same ID as the hub lip OD, but that doesn’t mean the spacer preserves the hubcentric lip to the wheel interface. In fact that’s what non hubcentric wheel spacers ruin: the hubcentric wheel interface.

So along come wheel spacers that have their own hubcentric lip extension that extends the original hub’s lip and preserves the hubcentric interface to the wheel.

Hopefully this makes sense? These spacers should really be called “spacers with a hub centric lip extension” but that’s a mouthful.

This also explains why some thinner spacers like 4mm don’t need a hub centric lip extension, because there’s still enough of the original lip poking through to support the wheel interface. The width of spacers we typically desire leaves almost no lip left.

Thank you for that. As an engineer, I totally get your explanation. I would have thought any manufacturer making plain spacers with no concentric location would have gone out of business. Stands to reason that a concentric location would be a must to make the product properly functional. And of course… safe!

 

[lynchy73]

Thank you for that. As an engineer, I totally get your explanation. I would have thought any manufacturer making plain spacers with no concentric location would have gone out of business. Stands to reason that a concentric location would be a must to make the product properly functional. And of course… safe!

there is nothing wrong or bad about a non concentric spacer (I believe the proper term is a shim for this type, but I might be totally wrong) so long as they are slim enough so that you can still use the original centre bore (I believe up to circa 6mm on the Emira).

A hubscentric spacer is easily possible for 12mm or more thickness on the Emira, but much less than that is challenging as the material would be getting thin. I run 12mm all round, but I’ve heard of 10mm hubscentric spacers being available.

So, there is a range of spacer thickness where it’s too thick for a shim, but not thick enough for a hubscentric spacer.

 

[kitkat]

there is nothing wrong or bad about a non concentric spacer (I believe the proper term is a shim for this type, but I might be totally wrong) so long as they are slim enough so that you can still use the original centre bore (I believe up to circa 6mm on the Emira).

A hubscentric spacer is easily possible for 12mm or more thickness on the Emira, but much less than that is challenging as the material would be getting thin. I run 12mm all round, but I’ve heard of 10mm hubscentric spacers being available.

So, there is a range of spacer thickness where it’s too thick for a shim, but not thick enough for a hubscentric spacer.

That perfectly describes the situation for the Emira and honestly with a lot of other cars too.

The Emira hub lip is 12.5mm long.

 

[seriously]

I had no idea you could run a "shim" and remain hub centric without that extra lip. how do we confirm what "mm" thickness would work in this fashion? It's actually perfect for me where I think I only want like 5-8mm.

 

[GRP]

I had no idea you could run a "shim" and remain hub centric without that extra lip. how do we confirm what "mm" thickness would work in this fashion? It's actually perfect for me where I think I only want like 5-8mm.

6-8mm would be about the max to leave some of the hub lip for the wheel to catch on when installing.
We have the 6mm BOE spacers on our site that we have sold for years if interested.

 

[DriverMod]

I'll look into it and see if one of our vendors has them available already.
Fwiw we havent had an issue with our current titanium stud kits which are made here in the U.S.

Following up, hopefully you’ve been able to source floating seat titanium lug nuts