Expert guide to upgrade modifications have a reasonable standard tire - tires, modified - Automotive repair and maintenance industry
Now Market Epidemic Tire Upgraded in two ways: One is the OE tires with the same choice, but the level of high performance tires of the better brands (ie, quality upgrading), such as Michelin, Goodyear and Dunlop brands. Another upgrade is the tire size (ie size of the upgrade), it simply is to widen the tire tread, or tire diameter increase, or both simultaneously.
For the first upgrade method, you only need to professional tire shop or access to the major tire brands website, or call another major tire manufacturers Inquiries. We are focused on upgrading the second method, the most important principles is to the diameter of the tire is almost unchanged, to expand or widen the diameter of the tire tread. After the upgrade should be done to upgrade the entire diameter of the tire size (diameter) and the original tire diameter (OD) data, the difference must be controlled within 3%, which does not affect the four-wheel-positioning accuracy.
First, we need to know something about tire expertise. In accordance with the standard tire manufacturing, has lots of useful information is molded on the tire sidewall, such as tire type, pattern, specifications, availability of inner tube, speed level, load index, as well as important safety and labeling (see above below).
Tire sidewall on a tire size logo, choose a tire change to consider when using these data. If a tire size of signs for the P195/65R1591V, its meaning is: P on behalf of passenger car tires; 195 representative of the tire width in millimeters; 65 representatives of high aspect ratio tire, that tire section height and width of the vertical percentage; R tires Structure code (radial structures); 15 representative inches in units of rim diameter; 91 representatives of load index, and the tire can carry a maximum load of the digital code; V is the speed symbol, the symbol and the tire design maximum safe operating speed corresponding.
Front tire that we have to understand the basic parameters, the following specifications we 185/60R14 tires, for example, how to judge the reasonableness of the tire conversion.
Rim diameter: 14 inches (355.6mm) Sidewall height: 185 × 0.6 = 111mm (185/60R14, 60, said aspect ratio is 0.6) Sidewall total height: 111 × 2 = 222mm (upper and lower rims have a sidewall height) Tire diameter: 355.6 +222 = 577.6mm If you want to change into a specification for the 195/50R15 tire, can it? Rim diameter: 15 inches (381mm) Sidewall height: 195 × 0.5 = 97.5mm (195/50R15, 50, said aspect ratio is 0.5)
Sidewall overall height: 97.5 × 2 = 195mm (upper and lower rims have a sidewall height) Tire diameter: 381 +195 = 576mm Specification and the specification of tire 185/60R14 195/50R15 tires compared to:
Diameter difference :577.6-576 = 1.6mm Difference in diameter ratio: 1.6/577.6 = 0.27% Difference in diameter than 3% within the allowable range, so you can use. Tire upgrade and modification process should pay attention to the problem: (1) to clear their Car Is not necessary to upgrade the tires and modified. Vehicles Power Output is an important factor to consider. If you do not have enough engine power supply plentiful, but blindly increasing the tire size is meaningless.
(2) complete the new upgrade replacement tires, be sure to do their balancing. (3) complete the new upgrade replacement tires, the owners can own the road comfort, noise, control and security changes. But do not immediately drive the truck to highway driving, we must first adapt to the new range of performance tires.
(4) If the larger tire diameter change is likely to interfere with the vehicle's computer system. Therefore, as far as possible the original selection and provision similar diameter tires, you can ensure your car computer system is normal, so effective control, such as ABS Brake System, traction control system, fuel management system, electronically controlled automatic Transmission And electronic stability control systems. Change the tire diameter and transmission to the computer the wrong message. The system itself will not be failure, but will largely be affected. If you are a very troublesome problem that may have any questions, please contact the tire dealer.
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