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Go Back   Madabout Kitcars Forum > Mad Build Area > Tribute Automotive Builds

Tribute Automotive Builds Discuss your Tribute kit build

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  #21  
Old 19th August 2015, 08:30
smash smash is offline
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Juts for the sake of completeness the 250 SWB originally ran on 185r15 Pirelli Cinturato CA67 tyres - 205/70 was considered the low profile option!

OEM CA67 185r15 diameter 675mm
Nubodi 205/70r15 diameter 668mm

So actually the Nubodi tyres are smaller diameter than original - go figure!

I think this means that I should probably choose tyres that will give roughly this diameter on the 18" rims I'm looking at else there may be too much space in the arches...I think #confused!

Last edited by smash; 19th August 2015 at 08:33..
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  #22  
Old 19th August 2015, 08:58
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Quote:
Originally Posted by smash View Post
Juts for the sake of completeness the 250 SWB originally ran on 185r15 Pirelli Cinturato CA67 tyres - 205/70 was considered the low profile option!I think this means that I should probably choose tyres that will give roughly this diameter on the 18" rims

My Micheldever Tyre Guide says:

OEM CA67 185r15 diameter 675mm 225/45x18 675mm
Nubodi 205/70r15 diameter 668mm 235/40x18 665mm

That probably accounts for the 195/65x15s on my Z300S looking "small" to some people at 655mm. Chosen more to match the diameter of the Z3 255/40x17 and the skinny 5" E-Type Jag rims.
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  #23  
Old 19th August 2015, 09:06
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Cheers Ian - I think I will have to go narrower on tyres and stretch them on the rim to give best chance of steering clearance at front when it's lowered.

Realistically I think it's going to be a case of getting the car finished before buying the wheels so I can trial fit various wheels and see what will work.

Just waiting for the right 3.0 donor - but I need to stop reading about double vanos replacement costs as it's scaring me, lol!
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  #24  
Old 19th August 2015, 09:15
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Quote:
Originally Posted by smash View Post
...Realistically I think it's going to be a case of getting the car finished before buying the wheels so I can trial fit various wheels and see what will work...
That's probably best for the 250SWB- there doesn't seem to be as much scope for variation in width/offset as the Z300S. I didn't have to think about bodywork covering the wire wheels even with the adaptors- it "just worked".



Hence 250 SWB Wheel Information
http://www.madabout-kitcars.com/foru...ead.php?t=5337
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  #25  
Old 19th August 2015, 10:34
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Yes been reading that - trouble with all these wire wheels is there never seems to be any offset info.

I know the wheel types won't be to everyone's tastes but this website: www.tyrestretch.com is really very useful to see how you can nick back a bit of room at the top of the tyre by essentially undersizing the tyre width and so stretching it - especially if you're going large rim
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  #26  
Old 27th August 2015, 18:43
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In the fourth pic you posted Chris, there's a white nose section behind that looks like SWB wings with a Z300 nose - what's that then?!
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  #27  
Old 27th August 2015, 19:48
Lucky@LeMans Lucky@LeMans is offline
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Quote:
Originally Posted by IanA View Post
My Micheldever Tyre Guide says:

OEM CA67 185r15 diameter 675mm 225/45x18 675mm
Nubodi 205/70r15 diameter 668mm 235/40x18 665mm

That probably accounts for the 195/65x15s on my Z300S looking "small" to some people at 655mm. Chosen more to match the diameter of the Z3 255/40x17 and the skinny 5" E-Type Jag rims.
Nubodi are running 225/70 - 15 which is why they look big .

They are a standard van size which probably isn't ideal on a BMW Z3 chassis.

Not sure of the speed ratings either.

I'm still of the opinion that a 195/70 or 205/70 - 15 would work better.
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  #28  
Old 27th August 2015, 22:31
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Quote:
Originally Posted by Lucky@LeMans View Post
Nubodi are running 225/70 - 15 ...Not sure of the speed ratings either...
A quick check on mytyres.co.uk shows 11 tyres of that size with an H speed rating (130mph) from 43 to 90 each.

And 5 tyres with a V (149mph) and W speed rating from 318 to 620 each.

I believe that the Z3 2.8 is quoted as a 143mph car so V rating is the minimum an MOT tester should pass.
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  #29  
Old 27th August 2015, 22:41
Lucky@LeMans Lucky@LeMans is offline
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According to the "KitCar" article they are 50 van tyres !
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  #30  
Old 27th August 2015, 22:46
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Quote:
Originally Posted by Lucky@LeMans View Post
According to the "KitCar" article they are 50 van tyres !
'Allo, 'allo, 'allo, sir. Is this your car?

That's why I made sure that the Falken Euro-All Weather tyres on mine were V rated.

Last edited by IanA; 27th August 2015 at 22:48..
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  #31  
Old 27th August 2015, 22:57
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I went for Dunlop W rating specifically as wanted high speed and high profile tyres, Don't forget that the arch and suspension and ride height all differ compared with the Ferrari. Difficult to dimension that one out at the Ferrari museum without taking its wheel off etc. I'm going down from 235/65/17 to a 235/55/17 and getting one fitted tomorrow to see the difference in aesthetics. Looks to me as if the front wheel arch can take a much larger tyre than the rear. I'll post some pictures to show differences.
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  #32  
Old 28th August 2015, 11:37
Lucky@LeMans Lucky@LeMans is offline
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Quote:
Originally Posted by IanA View Post
'Allo, 'allo, 'allo, sir. Is this your car?

That's why I made sure that the Falken Euro-All Weather tyres on mine were V rated.
I don't think the police or the MOT man will check the speed rating of your tyres, they're only interested in the tread depth and general condition. If you had a bad accident however you can bet they will be checked , ie too late !

The KitCar mag says about the handling being a bit strange and the "you can feel the tyres roll over when you corner " . Wonder what the pressures are in those van tyres , really low to get an acceptable ride I would think .
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  #33  
Old 28th August 2015, 12:46
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Quote:
Originally Posted by Lucky@LeMans View Post
I don't think the police or the MOT man will check the speed rating of your tyres...
Agreed- but an accident investigator would.

I even had a tyre dealer tell me that Vrated winter tyres "weren't required". I chose to disagree and obtained them anyway.
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  #34  
Old 28th August 2015, 20:29
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Quote:
Originally Posted by Lucky@LeMans View Post
...If you had a bad accident however you can bet they will be checked , ie too late !
I can confirm that's the case. I am aware of a couple of recent convictions for 'causing death by dangerous driving' that involved inadequate tyre speed ratings (on a Ferrari) and bodged suspension modifications (Land Rover).

If you fit van tyres you'll probably get away with it. If you don't, I hope you like porridge...
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  #35  
Old 28th August 2015, 21:53
Lucky@LeMans Lucky@LeMans is offline
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Perhaps Nubodi will revisit their tyre choice . To advocate their fitment in the kit car press and the same article going on to state the handing qualities are less than ideal on the Z3 base isn't the best way to sell your 18k product.
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  #36  
Old 5th September 2015, 15:55
Lucky@LeMans Lucky@LeMans is offline
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There are a number of posts now with completed cars with car tyres fitted rather than the van tyres fitted here by Nubodi.
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  #37  
Old 5th September 2015, 17:54
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Not sure what this obsession with calling them van tyres - they're just tyres!! Speed rating, well, probably 70% of all cobra reps are running incorrect speed rating because they fit Goodrich TAs which only come in H rating but they look right.

I managed to get w rating comp tas for my old AK cobra but I had to import them and they were old stock even then back in 2005
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