Review on Circuit Performance VC4 Series Red Aluminum Valve Stem Caps (8 Pieces) by Chris Lentz

Looks good and the bulge on the outside makes it easier to grip, but there is a significant design issue. The thread in the cap is too short. The threads are partially cut (formed?) on the lid, not up to the gasket, so when screwing in, it reaches the end of the thread before it makes contact with the little rubber gasket on the end. Therefore, there is no seal to prevent road dust from entering the valve stem and valve, which is the main purpose of the valve stem cap. I tried several modifications and the only one that worked well was removing the gaskets from the other caps. and fold them in three. Not a very good solution. I would give them 5 stars if they worked properly otherwise they are great. But it's like buying a nice Porta Potti: if it leaks, who needs it?