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Which tube???(7 posts)

Which tube???Aztecs
Jun 15, 2002 6:02 AM
I have a Lemond BA. Had my first flat. Installed the replacement tube given to me by my LBS when I purchased the bike (700 X 20/28C). No problems. Went to another LBS to pick up another replacement tube. Forgot to look at my tire before I left. Gave them some info and asked which size I needed. He gave me 650 X 18c-25c. He also said the 58 mm valve stem would be better for my Rolfs. Which time was I given the wrong tube? Will both work? My tires say 700 X 25c so the second tube is useless right?

Sorry for the stupid Question
48 mm valve stem not 58 mm (nm)Aztecs
Jun 15, 2002 6:03 AM
58mm will work fine..DINOSAUR
Jun 15, 2002 6:36 AM
The 58 will work fine. My LBS never has 58mm in stock and I've been using 60mm for going on 4 years for my Rolf VC's. You just need to be careful if you flatten on the road and use a frame pump to inflate the tire as it's easy to snap the valve stem if you put too much muscle into it....that's one reason I switched to C02...
What about 650 vs 700 (nm)Aztecs
Jun 15, 2002 6:38 AM
Not so goodKerry
Jun 15, 2002 5:41 PM
The problem is that your tube will be stretched to fit the 700c rim. It will thin the tube a bit, but the bigger problem will be the likely difficulties during installation and the associated much more likely pinching of the tube under the tire bead. Try it, you might not like it.
You're probably correct...DINOSAUR
Jun 15, 2002 8:58 PM
I skipped over the 650 wheel part. Probably would be better off with a 48mm valve stem...
Select the correct size....B2
Jun 16, 2002 8:24 AM
tube and then worry about the stem length. If you have 700c wheels, you want really want 700c tubes.

I'm not familiar with the stem length required for the Rolfs, but it sounds like the second guy just was focusing on the 58mm stem length and over looked the fact that he picked up a 650c tube. Probably an honest mistake.