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Mainproblem on other tire dimensions is the Loadindex. If i would buy tires with a lower LI, i have to lower the GAWR. The rearaxle has 7000lbs weight rating. If i would mount tires with just 3200lbs, i have to lower the GAWR to 6400lbs or 6200 with security margin, in the official vehicle papers.
And i have to lower the GVWR, because on the axleratings i have raised the GVWR to 12500lbs.
I know vehicle figures are chiseled in stone in the USA. In Germany not. Here we can adjust all figures if and only if a government accredited technical assessor proofs the security of the adjustments.
Weight ratings. Tires 3750lbs, Rims 3590lbs, Springs 3690lbs, Brakes 6000lbs and Axle 4000lbs. Limiting factor are the rims. If i change the rims to other rims with 3690lbs weight rating, i could get a legal 7280lbs GAWR on the rear axle. If all figures are aproofed by the assessor.
Next. GAWR front axle 6000lbs, rear axle 7280lbs, Frame 13000lbs. Possible GVWR 13000lbs.
Other example. We can buy a highly tuned VW Golf here, with a 3.6l biturbo V6. 745HP.
But you will never, never, never get a registration, if you only build in the engine. You have to modify the gearbox, the tires, rims and the hole Suspension system to get the vehicle safe and street legal. And a registration. And the only person who can aproof that all is good and safe is the assessor. And only if he gives his okay by several offical documents, you get the registration and your Golf on the streets.
And btw. I will not get any warranty on the tires. I have to order them by a dealer, but they are a special individual order, so no warranty for me.
Last edited by Tac; 06-17-2014 at 01:30 AM.