I changed my tires yesterday to NT-01. When I tried to check my tire pressure this morning, my tire gauge was having trouble pushing down the valve pin. It turns out the tire shop used a bad valve stem core.

Solution: Went to Kragen and pick up a set of valve stem and take the valve stem core out as donor.

Check these pictures out.



bad valve stem core sits lower



bronze one is the bad one.
Silver one is the replacement stem I picked up at Kragen.

They "look" about the same, but the new one sits much closer to the surface.

 

those bronze ones are known to go bad over time...i know at my shop we're not supposed to put those ones inside valves anymore.

 

Probably that tire shop guy picked up a random one instead of reuse the one on my volk valve stem.

 

Running NT-01 now huh?

 

Yeah RE-01R is too expensive LOL

 

Are you going to be daily driving with those tires on? If so, hopefully you don't end up heat cycling them to death.