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Benefit of Stem Size on Tubes, 60mm vs 48mm(5 posts)

Benefit of Stem Size on Tubes, 60mm vs 48mmStuartHB
May 11, 2003 5:21 PM
Need to buy new Continental tubes for my Grand Prix tires. Noticed that the tubes come in 48mm (med) or 60mm (large) stem sizes. Besides weight, what are the main advantages of having 48mm vs 60mm and which should I order ?

Thanks
It's your rim that makes the choiceKerry
May 11, 2003 5:46 PM
If you have high profile rims, you need the longer stem. For regular rims, you get the shorter stem. That is the only reason for the longer stem.
It's your rim that makes the choiceStuartHB
May 11, 2003 6:15 PM
I have Rolf Vector Pros.
It's your rim that makes the choicerussw19
May 15, 2003 5:14 PM
Rolf wheels = best fit with 48mm tubes from my expirience. Another thing you may want to do is when you order the tubes, be on the safe side and order a valve extender. They are cheap (under $5 in most cases.. never seen them over $10) and keep it in your seat bag. That way if you flat on the road and a buddy only has a regular (36mm) tube, you are still going to be able to use it to get you home.

Russ
re: Benefit of Stem Size on Tubes, 60mm vs 48mmTNSquared
May 11, 2003 5:58 PM
Typically the longer valve stems are used to accomodate deeper aero rims. Some aero rims are 50mm or deeper, so obviously a 48mm valve stem wouldn't work. If your rims are a more standard 21-23mm depth, I don't know of any reason to consider the 60mm. If your rims are more in the 30mm depth or deeper, you may want to go ahead and get the 60mm so that you have enought stem protruding to get the pump head on, etc. To my knowledge that is the only "advantage" of one over the other, but someone with more technical knowledge may be able to name several more.

BTW - I have 23mm deep rims and accidently purchased tubes with the 60mm stem. I am using the tubes with no problems, so if in doubt I think you can always go with the 60mm stem. Just looks a little goofy with so much stem sticking up from the rim edge.