#1
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correct tube size?
why buy the "right" tube diameter when the next larger size provides
greater flat protection due to the rubber getting stretched less thin- as buying a 38c not a 32c or is this faulty logic? or to ask another way-how much weight is saved and speed gained from a 38 to a 32?(x2)? |
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#2
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correct tube size?
why buy the "right" tube diameter when the next larger size provides
greater flat protection due to the rubber getting stretched less thin- as buying a 38c not a 32c or is this faulty logic? or to ask another way-how much weight is saved and speed gained from a 38 to a 32?(x2)? It can be difficult installing an oversized tube. Many people have enough difficulty with one of the correct size, and don't understand that adding a bit of air to the tube first actually makes the job easier. In some cases, tubes are undersized to begin with, so going to something a bit larger (indicated size) might be fine. But a truly too-large tube risks being installed with rubber folded over itself in places, which can cause flats due to abrasion. --Mike Jacoubowsky Chain Reaction Bicycles www.ChainReaction.com Redwood City & Los Altos, CA USA wrote in message oups.com... why buy the "right" tube diameter when the next larger size provides greater flat protection due to the rubber getting stretched less thin- as buying a 38c not a 32c or is this faulty logic? or to ask another way-how much weight is saved and speed gained from a 38 to a 32?(x2)? |
#3
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correct tube size?
"Mike Jacoubowsky" wrote: It can be difficult installing an oversized tube. (clip) ^^^^^^^^^^^^^^^ Look at the post by in rec.bicycles.misc |
#4
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correct tube size?
In article
t, "Leo Lichtman" wrote: "Mike Jacoubowsky" wrote: It can be difficult installing an oversized tube. (clip) ^^^^^^^^^^^^^^^ Look at the post by in rec.bicycles.misc Please supply the Message-ID header. e.g. Message-ID: -- Michael Press |
#5
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correct tube size?
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#6
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correct tube size?
On Wed, 01 Feb 2006 16:39:05 -0800, datakoll wrote:
why buy the "right" tube diameter when the next larger size provides greater flat protection due to the rubber getting stretched less thin- as buying a 38c not a 32c or is this faulty logic? Yes, it is. Stretching a tube a few mm will not make it prone to flats, but using a too-large tube makes it harder to get the thing inside the tire without pinching the tube between tire and rim. I was on a ride with a guy, rather clueless, who had just gotten thinner tires for his bike. The shop re-used the old, big tubes, and it was freaking impossible to get them inside. He had lots of explosive flats on the ride, and I eventually sent him back home with both of my spare tubes. Now, his was an extreme case; the tubes were for something like 38s and he was using more like 28mm tires. But in general, no advantage in using too-fat a tube, and serious disadvantages. -- David L. Johnson __o | Do not worry about your difficulties in mathematics, I can _`\(,_ | assure you that mine are all greater. -- A. Einstein (_)/ (_) | |
#7
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correct tube size?
wrote in message oups.com... why buy the "right" tube diameter when the next larger size provides greater flat protection due to the rubber getting stretched less thin- as buying a 38c not a 32c or is this faulty logic? or to ask another way-how much weight is saved and speed gained from a 38 to a 32?(x2)? I'd been running 700x28 tires on my main bike, but while it was in the paint shop, my backup bike had 700x23s. I got a flat (from a freakin' STAPLE), and the spare I was carrying was marked 700x28-32. It went in , sorta, and it got me the rest of the way to work, then to the shop to get a new 700x23 spare, then back home. The next time I took the bike out, I was about 5 miles out and the rear-end started feeling real squirrely. I stopped and checked the pressure, which was fine. I got back on, rode about 100 feet and had a blowout. The folded portions of the tube had all worn themselves very thin, and although the hole was small enough to patch, there were 3 or 4 other spots that looked like they could go at any time, since the folds made many weak spots. Too small is better than too big. Just right is best. |
#8
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correct tube size?
sounds reasonable. i was using fiber filled self sealers and the fiber
was giving me gas getting stuck in the needle valve so i went to walmart slimes which were GRRRRRRRRRRRRRRREATTT but 700c and 27"'s aren't racked now so back to specialized after wal's regulars lasted 500 miles or less with longitudinal rubber failures. wal now has a new supplier with a different look now installed will two slime liners over one tube wrinkle the rubber past design standards? |
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