Top of Presta Stem Snapped Off
07-24-24 | 06:50 AM
#26
Senior Member
Joined: Jul 2004
Posts: 8,162
Likes: 647
From: Brooklyn NY
Bikes: Kuota Kredo/Chorus, Trek 7000 commuter, Trek 8000 MTB and a few others
Another thing is to always buy tubes/valves with replaceable stems, and buy the little tool and a package of replacement stems. I did that a few years ago but haven't bent/broken another one again! See my post above too.
07-24-24 | 05:34 PM
#27
Old fart
Joined: Nov 2004
Posts: 26,383
Likes: 5,304
From: Appleton WI
Bikes: Several, mostly not name brands.
If you use sealant, it's nice to have extra valve cores on hand to swap in when the current core gets clogged with sealant. Let the clogged core soak in household ammonia solution for a while, brush off any remaining sealant with an old toothbrush, and put them back into the valve core rotation.
07-24-24 | 06:36 PM
#28
The Wheezing Geezer
Joined: Oct 2021
Posts: 1,857
Likes: 1,966
From: Española, NM
Bikes: 1976 Fredo Speciale, Rivendell Clem Smith Jr., Libertas mixte, Raleigh Super Record mixte
Long before removable presta cores (in the '70s), one rider in town (Tucson) broke all his off on purpose. Couldn't see any sense in them. Didn't want to fiddle with 'em.
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07-25-24 | 09:20 AM
#29
Klaatu..Verata..Necktie?
Joined: May 2007
Posts: 23,705
Likes: 17,167
From: SF Bay Area
Bikes: Litespeed Ultimate, Ultegra; Canyon Endurace, 105; Battaglin MAX, Chorus; Bianchi 928 Veloce; Ritchey Road Logic, Dura Ace; Cannondale R500 RX100; Schwinn Circuit, Sante; Lotus Supreme, Dura Ace
Every time I've had one break off, it holds air till I try to pump it up. Then, I guess the core gets blown down into the tube or something, but they don't hold air.
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07-25-24 | 10:17 AM
#30
Senior Member
Joined: Jul 2004
Posts: 8,162
Likes: 647
From: Brooklyn NY
Bikes: Kuota Kredo/Chorus, Trek 7000 commuter, Trek 8000 MTB and a few others
I had one that was holding air but when I went to put it back on the bike the movement blew out the stem anyway.
07-25-24 | 10:28 AM
#31
Senior Member
Joined: May 2010
Posts: 5,621
Likes: 2,485
From: Bastrop Texas
Bikes: Univega, Peu P6, Peu PR-10, Ted Williams, Peu UO-8, Peu UO-18 Mixte, Peu Dolomites
With your experience adding something to your tool kit is rare. I will keep this in mind if I ever go Tubless. Be sure to update your tool kit list...
Annual Tool Kit Check 2024
Annual Tool Kit Check 2023
Annual Tool Kit Check 2024
Annual Tool Kit Check 2023
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