Paul thought it would be fun to make a stem topcap that looks like their pad adjuster of the Klamper Disk Brakes, so you can really tie the room together when you have a bike with Klampers and a Boxcar Stem.

We agree, although you can run these top caps on any stem and they still look excellent

Add a touch of made in the USA class and CNC goodness to your bike, or throw a chain on it and wear it like a fancy necklace for the ultimate Paul fan club vibe =)