Stan's No Tubes 44mm Universal Valve Stem 1-Pair For Road Shifters The Tanpan 11 is compatible

The Tanpan 11 is compatible with 11-speed Shimano road shifters and optimized for eleven-speed Shimano mountain derailleurs (includes new Dura Ace 9100)

Drop-Stop ST is for use with Shimano 12-speed Hyperglide+ and 12spd KMC chains only

Stainless steel bolt with spherical washer

Weight - 178g

and minimalistic construction for unrestricted comfort

Stan's No Tubes 44mm Universal Valve Stem 1-Pair For Road Shifters The Tanpan 11 is compatibleThe original and still the best tubeless valve stem for most rims and a perfect fit for all Stans rim models. Durable brass construction Removable valve core makes adding sealant easy Fits up to 8mm valve hole Sold as individual valves, pairs or 25 piece shop pack