Advertise on Bikeforums.net



User Tag List

Results 1 to 3 of 3
  1. #1
    Newbie
    Join Date
    Feb 2006
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    valves and pumps

    do schrader and presta valves have different pumps and how do they work?

  2. #2
    Senior Member
    Join Date
    Sep 2001
    Location
    Montreal
    My Bikes
    Peugeot Hybrid, Minelli Hybrid
    Posts
    6,521
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The chuck that attaches the pump to the valve are different. The schrader valve includes a spring that holds the valve shut. The chuck for the schrader valve has a pin in the middle that holds the valve open while the chuck is attached. The presta valve is held closed by the pressure in the tire, but the valve has a little nut that holds it shut when not being pumped. You have to loosen this nut before you attach the pump chuck. Some pumps have chucks that have to be taken apart to convert from one style to the other, others have double heads, and some chucks recognize the valve type as you put the chuck on and reconfigure themselves accordingly.

  3. #3
    Senior Member capwater's Avatar
    Join Date
    Dec 2004
    Location
    Quahog, RI
    My Bikes
    Giant TCR Comps, Cdale R5000, Klein Q-Pro, Litespeed Siena, Piasano 105, Redline Conquest Pro, Voodoo Bizango, Fuji Aloha
    Posts
    1,509
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Also, you can get an adapter to use a shrader pump with a presta stem. Run ya few bucks.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •