See Twinhead Floor Bicycle Topeak now
I’ve gone through 2 of these twinhead replacement heads in the last couple months. Something happens when you frequently pump presta tubes. All of the sudden the twinhead fails and air goes out the Shrader side. Growing very tired of having a ride delayed or eliminated because the twinhead behaves so badly!
Topeak Twinhead Bicycle Floor | societyofherbariumcurators