Just wanted to comment on this, as it was a concern I had as well. Hopefully the following will provide some reassurance:
- My neighbor is the manager of the local Discount Tire; he ran the wheel on the balancer (an EM8340 if anyone cares) with the original plastic cap, and then with the CF cap and there was no additional balancing needed. Obviously, with the TPMS sensor already in there, there's a counter balance that takes care of that, he said that the additional 7g that these add was negligible. Obviously with any wheel tire, the dynamics change over time as the tire wears (and from tire to tire), so I think it's best practise to get your tires (re)balanced at least once during their life. FTR, my wheels are the 19" and the tires are about 35% worn.
- I've been driving with these since the end of November with no issues/vibrations etc.
- The height of these are 16mm (excluding logo application), which is the shortest type you can buy - there's many longer variants which I rejected, though mostly on the aesthetics.
- My supplier manufacturers, literally, millions of these for both OEM and after-market - they know what they're doing.
Obviously, if anyone is having second thoughts, just send them back and I'll be happy to refund you.
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I do wish the thread bore went much deeper...would reduce the weight and not make them stick out so far.
I tend to agree, but they all seem to be like this. The length of the cap is 16mm, and the bore is 10mm. The useable thread is a little over 8mm, which means it adds 8mm (0.31 inches) to the length of the valve stem.
for anyone having issues getting them all the way on - sometime the carbon fiber 'ring' can slip/rotate a little if you encounter resistance when tightening onto the stem. If this is the case (and of course assuming you're not cross-threading it), just grip the cap at the end (the chrome bit) to help grip it a little better.
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Please ignore the curb rash.
Thanks! Any chance you could take a couple more, but with the protective film removed from the cap (over the logo)?