And good luck getting help from Topeak. They used to be awesome but i had a mountain morph that came with a bad plastic piece inside but since I NEVER wanted to use it presta, I never noticed. That is until I noticed. I called Topeak and put in a trouble call. no return. emailed. nada. Luckily I found a piece for it at my local coop. I'm sure I'll still buy them but I'll be sure to check the status first!