Help with 13 inch wheels please

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Bleaky
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Help with 13 inch wheels please

Hello all,

Please can the collect wisdom here help me with sizing a second pair of wheels for my (new to me) Superlight R?

Currently the tyres I have are Avon CR500, front 175/55 R13, rear 205/55 R13 on split rims.

I want to use my 7 for autosolos and these Avons are not legal for the events because autosolos don’t allow Motorsport UK ‘List 1B’ tyres.

Therefore, I’d like a second set of 13 inch dia wheels.  Some tyres I have found that would be autosolo legal are:

Nankang NA1 rear 205/60 R13 that will fit a 5.5-7.5 inch rim and 175/60 R13 for 4.5-6 inch width rims.  I don’t know if they are any good…..

What I would like to ask is where I can get some wheels that will fit and particularly what offset they need to be for my car?  The current wheels don’t have any markings on them to give me a clue.

I’d be happy with second hand wheels so long as they are decent condition.  There are folks on eBay selling new Minilight style wheels, but I don’t know what offset to ask for.

Many thanks all.

Dave

Jonathan Kay
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The opinions on offset aren't consistent:

  1. Search of the archives.
  2. Some Assembly Guides have -19mm for wheels up to 6" and then it varies. It's in the "Upgrading and Options" chapter.

Jonathan

Hampshire West AR
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Dave

I see you have a Superlight R so the standard rims are 6.5" and 8.5".  

From the archives the fronts are +18mm and the rears +23mm.  However I found this from a post in 2002.  I have some SLR K&N split rims in the garage if you want any further measurements.  I may even consider selling them but depends on where you are located.

Nick

Offsets were researched when we were trying to put together the recent Ultralite Bulk purchase. Caterham and Mike Barnaby confrirmed that the 6" & 6.5" both had +18mm and the 8.5" +23mm. Now the tricky part is you can measure a dozen different wheels and get a different back depth on each. Backdepth is from the inner edge of the rim to the mounting flange and this is down to how the edge of the spun rim is finished. Also what you have to bear in mind is that as an example a 6" rim refers to the width of the tyre bead sealing faces and not the overall width of the rim which will be around 7" for a 6J wheel. Confused I hope not.

Bleaky
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Oh gosh, it's a minefield.  I need to do more reading.

@Nick, thanks for the offer.  I'm in Guildford, Surrey.

Dave

Dave

 

Wrightpayne
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Dave,

I was told below 200hp, 6" rims and 185/60 was all you needed. Wouldn't extra width on the rear inhibit progress?

I think a cheap set of 6x13" minilights would be worth looking into - I've seen them as cheap as £120 a set.

When I was at Parker Racing last week checking out seats for a fellow member they had stacks of minilights outside - maybe worth a call?

Ian

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Both the 8 spokes and newer Apollo's are 6" fronts and 8" rear.

 

AnkerB-S
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I will most probably have a set of 13" Minilites currently mounted with 225/45 13 tires for sale in the near future. $400 plus shipping.

Anker Berg-Sonne
Stow, Massachusetts

Old fart pretending that age is just a number

1987 Caterham Super 7 1700 Supersprint
2004 Porsche Boxster S
2009 Mercedes CLK 350 Cabriolet

Wrightpayne
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There looks to be a nice set of staggered Compomotive CXR wheels on ebay with Khumo tyres.

There was a bulk buy of these a few years ago which was very popular, as these are a very light wheel.

 

Ian

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If your looking for light wheels speak to Warren @ Revolution extremely helpful when I bought mine and we have a club discount set up with them too.

I run 4 spoke Race versions  6.5" fronts, 8" rear 

https://revolutionwheels.com/product-category/race/4-spoke-classic-race-wheels/

or Minilite style

https://revolutionwheels.com/product-category/rally/

Bleaky
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@ Ian, thanks for the tip off.  Is that Team Parker Racing? 

@ 7 wonders, I will contact Revolution too.

Many thanks indeed.

Dave

Dave

 

7 wonders of th...
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Bleaky

If thats your car in the photo I can show you what they look lke as mine ally / black too - I will blatyou my mobile so you can whatsapp me.