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#11
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700c vs 26"
Marty Wrote: Do you think every town has a LBS? Or even one that is conversant about tyres? And what if I see a 700B tyre? What's the difference between a C and a B? Is the B going to be suitable for my rim? And what does the 700 refer to anyway? If you measure your rim it's nothing like 700mm. Does it convert to inches somehow? If I'm swapping my singles wheel with my clincher wheel how much effect will it have on my speedo? How the hell do I know if the manufacturers won't tell me! For a while Velocity were making wrong sized rims and insisting the tyre manufacturers were making bad tyres. How do we work out who's right? I just bought a Continental ultra sport that has 700 by 23C written on it, is that the same as a 700c? Will it have the same diameter as 700 by 25? If the outside diameter is different then why do they call it 700? These are things I like to know. Every industry has their own terminology, rules, etiquette and standards. They are not explained in detail, on every item, all the time. Purchasing requires a little knowledge of the industry. This is why there are websites like Sheldon's, books like "Food Blending for Dummies", magazines like "PC Buying Tips".. I assume you own a PC and use it to post here. When you bought it you probably learned at some point what USB, SCSI, IDE, PCI, RAM, ROM, HDD, FDD, PCIMCIA, etc meant.. right? Same deal with bikes and any other industry - you might need to buy a book, browse a website or ask someone for information. Try asking here hippy -- hippy |
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#12
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700c vs 26"
hippy wrote:
Marty Wrote: Do you think every town has a LBS? Or even one that is conversant about tyres? And what if I see a 700B tyre? What's the difference between a C and a B? Is the B going to be suitable for my rim? And what does the 700 refer to anyway? If you measure your rim it's nothing like 700mm. Does it convert to inches somehow? If I'm swapping my singles wheel with my clincher wheel how much effect will it have on my speedo? How the hell do I know if the manufacturers won't tell me! For a while Velocity were making wrong sized rims and insisting the tyre manufacturers were making bad tyres. How do we work out who's right? I just bought a Continental ultra sport that has 700 by 23C written on it, is that the same as a 700c? Will it have the same diameter as 700 by 25? If the outside diameter is different then why do they call it 700? These are things I like to know. Every industry has their own terminology, rules, etiquette and standards. They are not explained in detail, on every item, all the time. Purchasing requires a little knowledge of the industry. This is why there are websites like Sheldon's, books like "Food Blending for Dummies", magazines like "PC Buying Tips".. I assume you own a PC and use it to post here. When you bought it you probably learned at some point what USB, SCSI, IDE, PCI, RAM, ROM, HDD, FDD, PCIMCIA, etc meant.. right? Same deal with bikes and any other industry - you might need to buy a book, browse a website or ask someone for information. Try asking here hippy Uhmm..ok. But you're missing the point. We know that ROM means Read Only Memory and RAM means Random Access Memory because the letters give us a clue, but what does 700C mean? It's not the outside diameter of the tyre and it's not the rim size, so it doesn't actually impart any information about the tyre. If the tyres were simply called what they are then someone new to cycling could simply measure the rim and order the appropriate tyre, they wouldn't have to ask anyone at all! Seems easy to me. This is my last posting on this subject, it annoys me too much. I hope you're still enjoying your travels. Marty |
#13
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700c vs 26"
Marty Wrote: Uhmm..ok. But you're missing the point. We know that ROM means Read Only Memory and RAM means Random Access Memory because the letters give us a clue, but what does 700C mean? It's not the outside diameter of the tyre and it's not the rim size, so it doesn't actually impart any information about the tyre. If the tyres were simply called what they are then someone new to cycling could simply measure the rim and order the appropriate tyre, they wouldn't have to ask anyone at all! Seems easy to me. This is my last posting on this subject, it annoys me too much. I hope you're still enjoying your travels. Okay, I guess it could be more logical, that would definately help. But logic is often left by the wayside when it interferes with profit-making or produces more work for Jimmy Beancounter. hippy -- hippy |
#14
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700c vs 26"
Marty wrote:
hippy wrote: Marty Wrote: Do you think every town has a LBS? Or even one that is conversant about tyres? And what if I see a 700B tyre? What's the difference between a C and a B? Is the B going to be suitable for my rim? And what does the 700 refer to anyway? If you measure your rim it's nothing like 700mm. Does it convert to inches somehow? If I'm swapping my singles wheel with my clincher wheel how much effect will it have on my speedo? How the hell do I know if the manufacturers won't tell me! For a while Velocity were making wrong sized rims and insisting the tyre manufacturers were making bad tyres. How do we work out who's right? I just bought a Continental ultra sport that has 700 by 23C written on it, is that the same as a 700c? Will it have the same diameter as 700 by 25? If the outside diameter is different then why do they call it 700? These are things I like to know. Every industry has their own terminology, rules, etiquette and standards. They are not explained in detail, on every item, all the time. Purchasing requires a little knowledge of the industry. This is why there are websites like Sheldon's, books like "Food Blending for Dummies", magazines like "PC Buying Tips".. I assume you own a PC and use it to post here. When you bought it you probably learned at some point what USB, SCSI, IDE, PCI, RAM, ROM, HDD, FDD, PCIMCIA, etc meant.. right? Same deal with bikes and any other industry - you might need to buy a book, browse a website or ask someone for information. Try asking here hippy Uhmm..ok. But you're missing the point. We know that ROM means Read Only Memory and RAM means Random Access Memory because the letters give us a clue, but what does 700C mean? It's not the outside diameter of the tyre and it's not the rim size, so it doesn't actually impart any information about the tyre. If the tyres were simply called what they are then someone new to cycling could simply measure the rim and order the appropriate tyre, they wouldn't have to ask anyone at all! Seems easy to me. This is my last posting on this subject, it annoys me too much. I hope you're still enjoying your travels. Marty I always heard it was 700 cm rolling distance per turn of tire .. C for clincher type rim, but really who the hell cares? Its the tire size you need if you have a modern roady. Your only going to get it wrong once. Try shooting. .17 .17magnum. .22 .22LR .22 short. .22magnum ..22/250 .222 .32 .38 .41 .44 .44mag .44.40 .45 .50 .500 .600nitro ..357 .357mag 6mm 7mm nine 10mm 410 12Guage 10guage , get it wrong and it might just blow your hand off |
#15
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700c vs 26"
Marty wrote: Uhmm..ok. But you're missing the point. We know that ROM means Read Only Memory and RAM means Random Access Memory because the letters give us a clue, but what does 700C mean? It's not the outside diameter of the tyre and it's not the rim size, The same is true of "26 inch." Actually, when these designations originated, they _did_ refer to the outside diameter of the tyre. "700C" tyres were originally 700 mm in diameter. However, as time went by and roads got smoother, people started running narrower and narrower tyres on the same rims, so the outside diameter inevitably shrank. so it doesn't actually impart any information about the tyre. If the tyres were simply called what they are then someone new to cycling could simply measure the rim and order the appropriate tyre, they wouldn't have to ask anyone at all! Right, that's the reason for the ISO/E.T.R.T.O. system. "700C" tyres fit ISO 622 rims. This problem has already been solved, but not everybody in the industry has gotten with the programme yet. There's really no reason to actually _measure_ rims nor tyres though, because the size is generally moulded into the sidewall of the tyre. Most tyres are clearly marked both in the obsolete systems such as "700C" _and_ in the modern ISO system. All you need to do is read the numbers. I explain the history and details of tyre sizing in excruciating detail at: http://sheldonbrown.com/tyre-sizing Sheldon "ISO/E.T.R.T.O." Brown Newtonville, Massachusetts (Don't blame me, I voted for Kerry) Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
#16
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700c vs 26"
Marty wrote: Uhmm..ok. But you're missing the point. We know that ROM means Read Only Memory and RAM means Random Access Memory because the letters give us a clue, but what does 700C mean? It's not the outside diameter of the tyre and it's not the rim size, The same is true of "26 inch." Actually, when these designations originated, they _did_ refer to the outside diameter of the tyre. "700C" tyres were originally 700 mm in diameter. However, as time went by and roads got smoother, people started running narrower and narrower tyres on the same rims, so the outside diameter inevitably shrank. so it doesn't actually impart any information about the tyre. If the tyres were simply called what they are then someone new to cycling could simply measure the rim and order the appropriate tyre, they wouldn't have to ask anyone at all! Right, that's the reason for the ISO/E.T.R.T.O. system. "700C" tyres fit ISO 622 rims. This problem has already been solved, but not everybody in the industry has gotten with the programme yet. There's really no reason to actually _measure_ rims nor tyres though, because the size is generally moulded into the sidewall of the tyre. Most tyres are clearly marked both in the obsolete systems such as "700C" _and_ in the modern ISO system. All you need to do is read the numbers. I explain the history and details of tyre sizing in excruciating detail at: http://sheldonbrown.com/tyre-sizing Sheldon "ISO/E.T.R.T.O." Brown Newtonville, Massachusetts (Don't blame me, I voted for Kerry) Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
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