Need a set of 1/24 slicks

[Ben_B]

I'm looking for a set of (preferably rubber) slicks for the last piece of my Esprit X180R project, and I haven't been able to find any. The wheels are 18 mm OD, which I think scales out to 18" in 1/24, but all of the 18" tires that are available (Renaissance, Scale Production) have 21 mm ID. I'll be happy to pay a fair price plus shipping or I would appreciate any tips on where to find a set for purchase.

I need two each:
18 mm ID, >=12 mm wide, ~26 mm OD
18 mm ID, >=14 mm wide, ~26.75 OD

I've found exactly what I'm looking for on my Fujimi Ferrari F40 LM, so I can always put it up on blocks since I'm not particularly fond of it, but I'm hoping there might be other sources.

Thanks!
Ben

[afx]

If your wheel measures 18 mm OD it scales out to be about a 16" wheel, see the chart below.  You should look for 16" aftermarket tires.

[Ben_B]

D'oh! I need to go back and review 5th grade math! I even have that picture saved on my computer. 

Thanks!

Ben