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Post by Chris on Apr 11, 2011 18:16:06 GMT -5
Anyone have the actual (in inches) the tire sizes front and rear for the Lotus 72? I want to make some up and need these specs in inches or the size off the tire sidewall?  ? Thanks Chris  |
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Post by kurzheck on Apr 11, 2011 19:55:46 GMT -5
I'll dig through my reference and see what pop's up.
Trev
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Post by Chris on Apr 11, 2011 21:54:05 GMT -5
Thanks Trevor, I have a bunch of the Entex 1/25 scale F-1 kits with those Ugly out of size tires and want to cast up something that looks right. I put some Hasegawa F3000 kit tires up against it and it looked sweet except the profile wasnt square enough. So I am thinking of casting up severl different sets for all those kits, I dont want to rob a $30-$40 kit every time.. Chris |
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Post by pje on Apr 12, 2011 0:28:53 GMT -5
Beware Chris. Most if not all the Entex kits were actually 1/28th scale. The Lotus 79 and Brabham BT46 that I have are 1/28th. I've never seen the Lotus 72 kit. Would love to see some photos. Stu has the 1/8th scale Lotus 72 kit and I'm sure he could measure the tires for you.
Paul Erlendson
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Post by indydog on Apr 12, 2011 5:59:52 GMT -5
If anyone ever does find tires for these Entex kits, I love to know where. I have the Tyrrell, BRM and Wolf W1 kits and the tires are really terrible.
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Post by Chris on Apr 12, 2011 6:37:45 GMT -5
I am hoping to offer some for sale or trade when I get them cast up.. a few sets anyway. More to come. Chris |
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Post by kurzheck on Apr 12, 2011 9:14:22 GMT -5
I'll check a few other sources, Otaki Nissan R382 and Fujimi Dome Zero. I've been hoarding gluebomb Hasegawa F3000 cars and Gunze F1 cars just for the tires as they close.
Trevor
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Post by Deleted on Apr 12, 2011 11:29:51 GMT -5
Chris, check out at www.gurneyflap.com, may you could see the tire dimensions, i think that front and rear wheels are 13 inches (the rear wheels looks more 15 inches than 13) In 1974 the rear tires use to be 28 inches. The Hasegawa F3000 tires looks good, but try Revell Ferrari 189 tires or Protar Ferrari F1 turbo tires, these tires looks very good, i'll use the Revell Ferrari 189 tires in a scratchbuild project. Cheers. Alex |
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Post by smbrm on Apr 12, 2011 17:47:53 GMT -5
Depends on whether you are looking for Firestone or Goodyear size?
I have a 1972 reference for Goodyear's as" 9.00/20.00 front and 14.00/26.00 rear on 10x13 and 17x13 inch wheels respectively.
Stephen
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Post by Deleted on Apr 12, 2011 19:26:14 GMT -5
Hi smbrm. I have some references about 73/74 tires, the rear were 26.00 than changed to 28.00 , tham back to 26.00 in 1976, but i'm not sure. I think that the revell Ferrari 189 and the Protar Ferrari Turbo 185/186 may can be used for a car form the 70's. Model Factory Hiro had a set of 60's 1/24 F1 tires, good for Heller 60's F1 (Mclarem M7 and Lotus 49) and maybe could serve for the Brabham BT33, i don't know if this set is still available. I'm thinking in research the costs to machine 1/24 F1 tires from the 70's, i found a bar of black hard rubber in a shop, the bar has 50 cm long and costs Rs$ 50,00 (aprox. US$ 30,00), but the machinis service is the most expensible, cost per hours (US$ 20,00/30,00) . The aluminium bar, to make the wheels, cost aprox. US$ 10,00 per kilo (Rs$ 16,00/17,00), its a project to the future for me . . . ( Alto Índice de Defasagem Salarial - High Level of Salary defasage (absense)
Cheers.
Alex
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Post by Chris on Apr 12, 2011 22:33:49 GMT -5
Stephan, those were the sizes I also found just a bit ago, I knew they were 13inch rims, because they still use 13 inch for F1. I was reading a report about Pirelli making the F1 tires this year and they wanted to change to 19 inch wheels but there is a good reason the FIA has never changed it. It limits the size of the brakes you can put inside and also makes the teams more equal in the braking dept... I never found out if they increased them this year but I know the team were all grumbling about the change in sidewall deflection 19 inch has very little and the change would have meant complete suspension redesign.. 13 inch is antique but I guess if it aint broken.......Thanks to everybody for the help I will see what I can do about making some prototypes and casting them. Chris |
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Post by smbrm on Apr 13, 2011 11:18:19 GMT -5
I believe fundamental tire dimensions were not changed to allow 19 inch rims for 2011. One thing about lower profile tires was that Firestone tried them on 13 inch wheels, I think around 1971ish. Apparently there was so much vibration that the drivers were complaining their eyeballs were rattling! Larger side wall allows for more compliance. The spring rate of the tire is just as important as the springs themselves. Personally I think low profile tires look good on street cars and the increased tire wall spring enhances the handling feel. I wonder however if low profile tires on F1 cars will make them look too much like hotwheels?
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Post by Chris on Apr 13, 2011 16:12:32 GMT -5
I dont think they even had Radial tires in 71 !! The radial will absorb about 70% more sidewall deflection , I sold tires for almost 30 years.. Geeeeze I dont miss that!!! Chris
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Post by Deleted on Apr 13, 2011 17:43:07 GMT -5
Radial tires were introduced by Michelin in 1977, when the Renault RS01 debuted, and in 78 Ferrari decided to use Michelin too. Goodyear made some tests in 79 with Mclaren (i think that Patrick Tambay drove a M28 with Goodyear radial tires in a GP tests). Pirelli came with radials (Pirelli P7) and in the 80's , except by the Avon, Goodyear, Michelin and Pirelli were all radials, the "slicks" were introduced in 71 by Dunlop with BRM team.
Cheers.
Alex
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? Thanks Chris 
