How Much Do Flow Formed Wheels Weigh?
2 Answers
Flow formed wheels of different sizes have varying weights. For example, a 15X6J flow formed wheel can bear 620 kg, with a net weight of 5.4 kg plus 4 lug nuts totaling 5.8 kg. Definition of Flow Formed Wheels: Flow formed wheels refer to the flow forming process. Strictly speaking, they are a branch of 'casting.' 'Flow forming' involves using high-pressure rollers to press and extend the sidewalls of a rough wheel rim blank. Simply put, the principle of 'flow forming' is similar to 'hand-pulling a ceramic blank.' While rotating, pressure is applied to the sidewalls to stretch and thin the aluminum alloy blank. The high pressure reshapes the aluminum alloy, increasing its density during processing and making the internal crystal structure of the aluminum alloy more compact. Differences Between Flow Formed and Forged Wheels: The main differences between flow formed and forged wheels lie in cost, appearance, and performance. In terms of cost, flow forming technology is relatively simpler, suitable for mass production with lower costs, while forging technology is more complex, resulting in higher costs but superior performance. The appearance of the two is difficult to distinguish, but they differ significantly in metal properties. Forged wheels have better fatigue resistance, impact resistance, and strength compared to flow formed wheels. In terms of weight, flow formed wheels are generally about 20% heavier than forged wheels.
Flow-formed wheels are indeed significantly lighter than regular cast wheels, which I've researched. Generally, a 17-inch flow-formed wheel weighs around 8 to 10 kilograms per piece, while an 18-inch one might be about 10 to 12 kilograms, depending on the brand and design. Lightweight is its greatest advantage, being over 20% lighter than cast wheels of the same size. Don't underestimate this weight difference—reducing the car's weight by several dozen kilograms makes a noticeable difference in driving. Acceleration becomes quicker, and the steering feels more responsive during turns. Another benefit is improved fuel efficiency. A few friends who modified their cars tested it and found that after switching to flow-formed wheels, their fuel consumption dropped by 0.3 to 0.5 liters per 100 kilometers. Additionally, on bumpy roads, lighter wheels put less strain on the suspension system. Of course, they are more expensive than cast wheels, but in the long run, they're worth it.
