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380 wheels on a 350


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So the the playground Wiki says you shouldn’t do this.

The rear wheel on the 380 is slightly wider with an adjusted offset and also apparently requires longer bolts to ‘ensure full thread engagement’.

Anyone else made this change? I am looking at a 2nd set of wheels (used) but now not entirely sure they are right for my 350....

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35 minutes ago, Silverback said:

So the the playground Wiki says you shouldn’t do this.

The rear wheel on the 380 is slightly wider with an adjusted offset and also apparently requires longer bolts to ‘ensure full thread engagement’.

Anyone else made this change? I am looking at a 2nd set of wheels (used) but now not entirely sure they are right for my 350....

Buy from Seriously Lotus, he got the offset correct, so you don't need longer bolts and can run 285/30/18 tyres

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The 350 rear wheel is 9.5" wide with 35mm offset.

Provided *the playgrounds* 😉 wiki is correct in stating the 380 rear wheel is 10" wide with a 15mm offset, that same wheel will extent 26mm towards the outer position.  I'm a fan of aggressive offsets, but that for sure is not going to fit.

Wheels being forged, the solution might be in milling the center drop down 15mm.

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3 hours ago, Kristof Thys said:

The 350 rear wheel is 9.5" wide with 35mm offset.

Provided *the playgrounds* 😉 wiki is correct in stating the 380 rear wheel is 10" wide with a 15mm offset, that same wheel will extent 26mm towards the outer position.  I'm a fan of aggressive offsets, but that for sure is not going to fit.

Wheels being forged, the solution might be in milling the center drop down 15mm.

That info is not correct

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7 hours ago, Seriouslylotus said:

That info is not correct

Oef, I figured something was off; can't see Lotus changing something dramatically at the rear axle 350 vs 380.

 

But it does state ET 15 on the Playgrounds' wiki 😆

 

5-bolt fixing
Front: 7.5J x 17" ET30
Rear: 10.0J x 18" ET15

Do you know what the offset is on the 10" wide wheel of the 380 Dave?

 

 

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@Kristof Thys

Road Wheels
All models - except Exige Cup 380
Type                                             Cast alloy 5-bolt fixing                       
Size - Front 7.5J x 17H2 ET26.3
 - Rear 9.5J x 18H2 ET35
Inset - Front + 26.0 mm
 - Rear + 35.0 mm
Exige Cup 380
Type Lightweight 10 spoke forged alloy
Size - Front 7.5J x 17H2 ET26.3
 - Rear 10J x 18H2 ET32
Inset - Front + 26.0 mm
 - Rear + 32.0 mm
Wheel bolts
Total overall length: 57mm
Lotus part number: A138G6012F
PCD (Pitch Circle Diameter)
Size - Front 110.0 ± 0.1 mm
 - Rear 114.3 ± 0.1 mm
Centre spigot hole diameter 
Size - Front 65.14 mm
 - Rear 68.14 mm

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2 hours ago, Kristof Thys said:

@vd9 Thanks for that.  Also confirms it's not gonna be any issue to have the 18x10 ET32 wheels on a 350 (vs 18x9.5 ET 35).  So S E L O C wiki is wrong.

also the above info is incomplete

The 350 10 x 18 rear forged wheels are et35. the very first ones sometimes catch on the inner against the subframe. The wheels where modified to have a chamfer on the inner edge. to stop the catching. When I was carrying out some development, I asked for ET31 wheels.

ALL the current offerings of the forged wheel now have a chamfered inner edge

Although the 380 forged wheels are listed as et32 they are not a true et32 wheel, they are actually an et35 wheel with a 3mm spacer added during production

(Bit of a bodge in my opinion).

The Forged wheels available from a supplier in the uk are an ET33 wheel....pretty close to the Lotus ones fitted to the Exige 380/430 cup

 

Edited by Seriouslylotus
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18 hours ago, Seriouslylotus said:

 

Although the 380 forged wheels are listed as et32 they are not a true et32 wheel, they are actually an et35 wheel with a 3mm spacer added during production

 

 

😯🙄

 

Thanks for the info Dave, nice job! 

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  • 4 weeks later...
On ‎08‎/‎10‎/‎2018 at 21:13, Bravo73 said:

The KT ones are. KT commissioned them originally from Rimstock then Lotus asked if they could be OEM. 

It is the basic Rimstock forged wheel basically for touring cars - one size fits it all … just an adaptation.
Lotus could do so much better. But again there was a controller with an Excel sheet which stated differently 😉

 

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On ‎06‎/‎10‎/‎2018 at 14:36, Seriouslylotus said:

also the above info is incomplete

The 350 10 x 18 rear forged wheels are et35. the very first ones sometimes catch on the inner against the subframe. The wheels where modified to have a chamfer on the inner edge. to stop the catching. When I was carrying out some development, I asked for ET31 wheels.

ALL the current offerings of the forged wheel now have a chamfered inner edge

Although the 380 forged wheels are listed as et32 they are not a true et32 wheel, they are actually an et35 wheel with a 3mm spacer added during production

(Bit of a bodge in my opinion).

The Forged wheels available from a supplier in the uk are an ET33 wheel....pretty close to the Lotus ones fitted to the Exige 380/430 cup

 

Dave any news on when I can place an order for the 430 ET35 wheels in silver?

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14 minutes ago, Lo2zz said:

Dave any news on when I can place an order for the 430 ET35 wheels in silver?

No---- ET35 are the standard lotus offset

The 430 wheels are the same but with a spacer screwed to the mount face to make them et32 (IMHO a bodge)

No delivery date on 'proper' ET32 wheels at the moment

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  • 1 year later...

I was looking at this 410 today at Bell and Colvill - its stance looks better than my 380 Sport - the rear wheels really sit flush to the arches, rather than sitting in.

The 410 uses a 285 rear vs 265 on the 380. 

So based upon the above, to get the same look on a 380 Sport, I'd need a 285 and a 3mm spacer?

And so if the 410/430 use a 3mm spacer - assume it would not be unsafe to fit the same to a 380 Sport and use it on track?

Thoughts appreciated.

 

orange 410.jpg

road test pic of a 380 Sport for comparison  - tbh it looks as though the wheels sit wider front AND rear on the 410. Can't obviously see a spacer on the DeRoure parts diagrams.

exige-380-0306.jpg

Edited by Five50
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14 hours ago, Five50 said:

I was looking at this 410 today at Bell and Colvill - its stance looks better than my 380 Sport - the rear wheels really sit flush to the arches, rather than sitting in.

The 410 uses a 285 rear vs 265 on the 380. 

So based upon the above, to get the same look on a 380 Sport, I'd need a 285 and a 3mm spacer?

And so if the 410/430 use a 3mm spacer - assume it would not be unsafe to fit the same to a 380 Sport and use it on track?

Thoughts appreciated.

PIC

road test pic of a 380 Sport for comparison  - tbh it looks as though the wheels sit wider front AND rear on the 410. Can't obviously see a spacer on the DeRoure parts diagrams.

 

The spacer is bonded on to the wheels for the 410/430 giving the offset of ET32 v's ET35 - its not available as a spacer separately, they just sell as the same wheel with the spacer integrated with different part number.   (B138G0113F vs A138G0075F)

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