Review on 🔧 40mm Presta Tubeless Valve Stem - Pair for Enhanced SEO by Chris Elam

I used a pair of 40mm tubeless Presta i72 valve stems to convert my MTB to tubeless. The rims I converted were not tubeless and had adapters with Schrader to Presta valve holes. These adapters are like "rings" that fit into holes that match the size of Schrader valves and are slotted to allow for contraction/expansion during installation. This separation creates massive air leakage. These valves, along with two layers of Stan's rim tape and Stan's NoTube sealant, successfully sealed and turned my MTB into a tubeless setup. The valves were supplied with mounting nuts and O-rings. They are tight and secure. The kernels looked and worked as they should, no problems uninstalling, installing, opening or closing. Both my pump and gauge also worked properly with the valves. I haven't had any issues with them sticking or sticking due to the sealing. Overall I am very happy with the performance of these valves. Thank you for taking the time to read my review. I hope it was helpful to you.