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Hello Tibor, It’s good to see you asking all these questions….. this should help you avoid a lot of “weld it in/ cut it out “…… although we all have done some of this .
I may step on some toes here, but here goes . . . I noticed you discussing tire sizes, a stock NC being 205 wide, and at 17 rim, probably a pretty big contact-patch on the ground. For a 2400 pound car this is probably appropriate. I’m just wondering, when we build our sevens with 1200 to 1300 pounds (roughly half of an NC) if driving it on 205’s will generate enough heat in the tires to make them effective. Many Caterhams , and other builders have used something more in the sizes of 185 width, 195 width . A 205 would probably warm up ok, especially with a softer, stickier compound summer tire, but a 245, while it looks cool, may not be ideal for performance. They may fall short in traction if they don’t get up to optimum temperature. If they don’t work well, you might as well have a smaller tire that does work. Just something to think about.
I expect my weight to be about 1300 pounds, and I will be running 205/50-15’s in a summer compound, Bridgestone Potenza RE-71R, I’m hoping theses are not too big.
Skidzzz
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japanese proverb - If you fall down seven times.............stand up eight.
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