Why is the price of the tire valve so wide?

Why is the price of the tire valve so wide?

The difference between the steel material and the rubber material lies in the exposed part, and the directly heated part is turned into a steel material, which naturally alleviates the problem of heat aging. However, whether it is steel or rubber, they all have a certain life. In general, the life of rubber valves is 3 to 4 years, while that of steel is slightly later.

If you want to use the same tire valve for a long time, then all-steel and all-aluminum materials are the first choice. Metal-made valves are not easily oxidized and airtight. Their life span is two to three times that of rubber valves, and the price is five to eight times.

All steel and all aluminum are similar in terms of life and air tightness. Why is all aluminum more expensive than all steel? All steel material, compared with all-aluminum material, has a very fatal shortcoming that it will rust, seriously affecting its appearance, and even affect its life.
The all-aluminum material is lighter in weight and is the lightest of these materials, while the all-steel material is the heaviest. The four add up to about 150g, while the all-aluminum is only about 50g, just like an apple and A gap in A4 paper.

The lighter weight makes it easier to balance and eliminates the need to assemble more counterweights. In contrast, the unsprung mass is lighter, but the gap is almost negligible and does not have to be tangled.