Stock Emira Wheels and Tires

[Nova]

For some reason, I was under the impression that the Good Year Eagles are going to be all-season tires. However, it looks to be a summer-only tire. Once it wears out I'd likely get Michelin Pilot Sport All-Season 4.

 

[~el~jefe~]

I am reading that the summer tire Good Year one is designed for the car. Is that true? like porche's N spec tires?

 

[digilotus]

I am reading that the summer tire Good Year one is designed for the car. Is that true? like porche's N spec tires?

Yes I believe both Goodyear SS and Michelin Cup 2 options are ‘LTS’ variants specific to Lotus.

 

[~el~jefe~]

Yes I believe both Goodyear SS and Michelin Cup 2 options are ‘LTS’ variants specific to Lotus.

Ah, then I would suggest to everyone possible who might drive ever in the rain, to not use Michelin whatever tires on this when they get it. if Porsche used standard tires, it would be a bro death trap in the rain. It instead has tires altered to be safe and perfect for their cars. You really cannot put such wide tires on a 3000 lb car without dying in bad weather, unless it is specifically designed to work together. The 718's which i am quite familiar with, at 2980 lbs with huge fat tires on the rear, do very well in the rain. Most cars with a bit smaller tires do terribly compared. Just a thing to think about and one day test. I personally have no love for any tire brand other than Pirelli for winter performance, and Michelin for summer and all seasons. But I would stick to the engineered tire for these odd-ball lightweight machines. Just my tidbit here

 

[Porter]

Has anyone out there come across any updated information regarding the factory wheel specs?

Would love to know the offset, and whether there are any geometry differences between the base wheels and the forged.

 

[robrmon]

Has anyone out there come across any updated information regarding the factory wheel specs?

Would love to know the offset, and whether there are any geometry differences between the base wheels and the forged.

I’d be curious to know operating temperatures

 

[Porter]

I posted this in another thread, but figured I would cross-post here since it's technical data on factory wheels that may become relevant to someone later.

The Emira is apparently shipping with 8.5J x 20 front and 10.0J x 20 rear. [New info - Production Emira rear wheels are 10.5x20] Emira wheel offsets are still currently unknown [see below] but will likely be somewhere close to the ranges below... a very high offset spec for production wheels compared to other manufacturers.

From the Lotus service bulletin on wheels from September 2017, detailing the Evora factory wheels:

Evora 400, Sport 410 & GT430 Sport​

Type - std/opt Cast Alloy or Forged, 5 bolt fixing​

- front 8.0J x 19H2 ET55​

- rear 9.5J x 20H2 ET69​

​

Evora GT430​

Type - std Forged, 5-bolt fixing​

- front 8.0J x 19H2 ET55​

- rear 10.5J x 20H2 ET69​

​

All​

PCD (Pitch Circle Diameter)​

- Front/Rear 114.3 ± 0.1 mm​

​

Centre spigot hole diameter​

- Front 69.06 mm​

- Rear 68.06 mm​

New info! Emira FE production wheel specs are:

Front: 8.5x20 ET 57
Rear: 10.5x20 ET 54

Manufactured by Dicastal (US) in China.

Other markings indicate they are forged from 6061 aluminum though oddly it doesn't indicate what alloy, which would be useful.

The front are rated to to 460kg, rear to 685kg.

More detailed specs will come in time, including center hole diameter for hubcentricity.

 

[Porter]

I asked Lotus explicitly about the wheel offsets and got this as a response. Does anyone else find this really weird? Production is already started, and they are unable or unwilling to say what the offset spec of the wheels are?

 

[VL3X]

I asked Lotus explicitly about the wheel offsets and got this as a response. Does anyone else find this really weird? Production is already started, and they are unable or unwilling to say what the offset spec of the wheels are?

View attachment 4292

They started production a month ago and there are so many unknowns (or at least not able to share with consumers). I suspect we'll have to wait until customers actually take delivery and do independent testing to know certain things like wheel weights and offset.

 

[VL3X]

They started production a month ago and there are so many unknowns (or at least not able to share with consumers). I suspect we'll have to wait until customers actually take delivery and do independent testing to know certain things like wheel weights and offset.

Oh, and Tammy is always the person answering my questions too. She must be very busy. I inquired about the new Performance Division and asked to be on the list to order the first bespoke Emira and was basically told to talk to my dealer and there is no list or more information on that program yet.

...then why even announce it?

 

[Porter]

Updated info from @hml_xy who took photos of the inside of his wheels on his new Emira (Germany).

Stock wheels on the FE (forged) are the following spec:

Front: 8.5x20 ET 57
Rear: 10.5x20 ET 54

Manufactured by Dicastal (US) in China.

Other markings indicate they are forged from 6061 aluminum though oddly it doesn't indicate what alloy, which would be useful.

The front are rated to to 460kg, rear to 685kg.

 

[kitkat]

It's almost certainly 6061-T6.

 

[Porter]

It's almost certainly 6061-T6.

That's my assumption too, but I've seen some weird variations in the wheel market in recent years. Would be nice to know explicitly.

 

[kitkat]

I wonder if we can just email Diecastal and ask them about weights

 

[VL3X]

Sharing some current pricing and details from TireRack:

For the lazy, the total costs (in the US) come to:
F1 SuperSports: $1,518.60
Cup2s: $2,242.38
Difference: $723.78

 

[TomE]

Useful info. I assume the CON 240 is because it’s the Connect version with the in-built temperature sensors and the higher wear rate?

Do they also have a normal initial tread depth, as I think the standard Cup2s start with 1-2mm less than a regular road tyre?

 

[digilotus]

Sharing some current pricing and details from TireRack:

View attachment 10822

For the lazy, the total costs (in the US) come to:
F1 SuperSports: $1,518.60
Cup2s: $2,242.38
Difference: $723.78

Are these LTS marking tyres or generics?

 

[kitkat]

Useful info. I assume the CON 240 is because it’s the Connect version with the in-built temperature sensors and the higher wear rate?

Do they also have a normal initial tread depth, as I think the standard Cup2s start with 1-2mm less than a regular road tyre?

They don’t even come with the sensors, that’s sold separately. These just have a little pouch built in to hold the sensors.

 

[kitkat]

The supercar 3 (not 3r) would be a better comparison to the cup2. I’m not sure I’d put the super sports in the same category.

 

[VL3X]

The supercar 3 (not 3r) would be a better comparison to the cup2. I’m not sure I’d put the super sports in the same category.

Oh, for sure! I was just comparing the 2 OEM options. I was curious to see pricing and weight. I opted for the F1s, but I'll likely throw on PS4S (or maybe even Firehawk Indy500s if they're offered in our size) if they wear quickly or just aren't any good.