Tyre sizes.

Roscobbc

Roscobbc

Moderator
Mr. Cricket said:
There you go

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Before the redlines..

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The yellow one was stock height but with the same size tyres as the red one which you can see with the distance from the top of the tyre to the wheel arch lip:

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Wow that looks like its on stilts Stuart - surely can;t be right? - Thought I'd check mine out.
Took measurement from centre of wheel to top of fender openings - front driver side 16" - rear drivers side 17" - front passenger side 16" - rear passenger side 17.5".
That's with 27" tall tyre on front and 26.7" on rear - Stock F41 springs front and rear.
Seems to fill wheel opening quite well.......perhaps rear could be lower but I do have major ground clearance issues......(see exhaust under car)
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antijam

antijam

CCCUK Member
Snap!
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....but mine are 215's not 225's - the rolling radius is nearer that of the original bias plys so the speedo remains more accurate. What tyre pressures are you running?
 
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Mr. Cricket

Mr. Cricket

Committee Member
Roscobbc said:
Wow that looks like its on stilts Stuart - surely can;t be right? - Thought I'd check mine out.
Took measurement from centre of wheel to top of fender openings - front driver side 16" - rear drivers side 17" - front passenger side 16" - rear passenger side 17.5".
That's with 27" tall tyre on front and 26.7" on rear - Stock F41 springs front and rear.
Seems to fill wheel opening quite well.......perhaps rear could be lower but I do have major ground clearance issues......(see exhaust und
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I measured them side-by-side when both were in the garage and the yellow one was exactly 1" lower front and rear than red. The stock C3 set up on early models was always a bit 4 by 4ish
 
Mr. Cricket

Mr. Cricket

Committee Member
Well I hope they've sorted the "blooming" issue out and your's don't turn into RBL tyres. The supplier will tell you to only use mild soap and water and avoid products like tyre shine, or abrasive cleaners. I tried to make a warranty claim on mine like a lot of Americans did and was told to piss off by NHT.

Don't have many pics of the '72 that I put the RWL BFG's on but here's me and a small section of the tyre on show :unsure:

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Mr. Cricket

Mr. Cricket

Committee Member
Mad4slalom said:
Just checked pressures and 26 cold was 28 hot so dropped to 25 and rides much better. Handbook says 24 so can dtill drop 1psi yet if needs be. Loving the new look👍
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Three of us spent all afternoon wrenching on my mate Dave's new-to-him 1970 C3 which has new Cooper Cobras all round and it was a bit skittish and had some understeer so maybe the 29psi he has in there is way too high for those tyres? Stunning Corvette that just needs a few niggles sorting out. Mulsanne Blue, blue interior and a black soft top. A good day messing with Corvettes (y)
 
Mad4slalom

Mad4slalom

Well-known user
Mr. Cricket said:
Three of us spent all afternoon wrenching on my mate Dave's new-to-him 1970 C3 which has new Cooper Cobras all round and it was a bit skittish and had some understeer so maybe the 29psi he has in there is way too high for those tyres? Stunning Corvette that just needs a few niggles sorting out. Mulsanne Blue, blue interior and a black soft top. A good day messing with Corvettes (y)
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Sounds like a great day to me 👍
 
Forrest Gump

Forrest Gump

CCCUK regional rep
Some detailed info on ride heights here.
This would be based on the F70-15 tyres fitted at that time with diameter of 26.9”
With standard suspension, ground to wheel arch dimension is around 28”. With F41 Gymkhana sports suspension it’s around 27.5”, and depending on the cars options like C60 air con. A full tank of fuel will lower the rear obviously, but also lift the front slightly.
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Roscobbc

Roscobbc

Moderator
I'm considering having my stock 8" steel rims refurbished and fitted with new 225/70/15 tyres. Not concerned about the white lettered look - definately not whitewalls!
'Modern' high performance 15" tyres are a rarity with very few suitable European brands being sold.
Looking on North Hants website the Goodrich and Diamondback 'red band' tyres look smart......but at over £300 per 'corner'......er, don't think so.
'Old school' BFG's, MT's and Coopers are perhaps more reasonable at around £100 less per tyre.......but like the red band tyres above all have low speed ratings, so 'T' (118 mph) for BFG/MT's and 'S' (112 mph) for Coopers.
The Vitour Galaxy tyres at around £130 per corner have a higher 'H' (130 mph) speed rating and cost out at around £130 per tyre.....user reports seem favourable..........
North Hants also have the Dimax Classic tyres in various sizes which all seem to be 'W' (168 mph) rated. At less than £100 plus VAT they seem a well priced alternative.........
But does the tyre name (Classic) and 'touring' in their description give the gave away in terms of grip/handling/braking etc? - and are they much the same as the other more expensive BFG's, Coopers, MT's and Vitour Galaxy tyres?........there are some rather extreme Mickey Thompson ET Street's and ET Radials with minimal tread pattern.
Does anyone have experiences of using any of these tyres?
 
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