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Favorit hub and 35 PSI tire
Today was yet another bike that looks like
every other, a 26" Crescent open-frame from the 70s or 80s. I removed the rear wheel and noticed the familiar Torpedo single speed hub. Only there was something unfamiliar to it. Turns out, it is a Czechoslovakian Favorit! And it appears this was of no less quality than the Torpedos and SAs because it looks very good. Even the tire is of the original package, it reads "Made in Czechoslovakia" which was dissolved in 1993. The tire, Barum, is also of good quality with all the markings, the ISO or ETRTO 44-584 as well as all three inch sizes, 26 x 1 1/2 x 1 5/8. It also says T15/V10 (?). Last thing it says is somewhat of a surprise: "Inflate to 35 PSI - 250 kPa". Only 35? To compare, without having to look for another 44-584, I checked out the front wheel tire of the same bike. This is a 40-609 with a familiar 50 PSI or 350 kPa. Actually, I always thought those data too high. The tire gets super tight. So perhaps 35 is more reasonable even tho compared to what is usually there, much lower? -- underground experts united http://user.it.uu.se/~embe8573 |
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#2
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Favorit hub and 35 PSI tire
I just now put in ~35 PSI and it is stiff
enough. Perhaps that smaller BSD played a trick on me? One should compute the volume to find out if it really is less preassure... -- underground experts united http://user.it.uu.se/~embe8573 |
#3
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Favorit hub and 35 PSI tire
On 6/18/2017 1:28 PM, Emanuel Berg wrote:
Today was yet another bike that looks like every other, a 26" Crescent open-frame from the 70s or 80s. I removed the rear wheel and noticed the familiar Torpedo single speed hub. Only there was something unfamiliar to it. Turns out, it is a Czechoslovakian Favorit! And it appears this was of no less quality than the Torpedos and SAs because it looks very good. Even the tire is of the original package, it reads "Made in Czechoslovakia" which was dissolved in 1993. The tire, Barum, is also of good quality with all the markings, the ISO or ETRTO 44-584 as well as all three inch sizes, 26 x 1 1/2 x 1 5/8. It also says T15/V10 (?). Last thing it says is somewhat of a surprise: "Inflate to 35 PSI - 250 kPa". Only 35? To compare, without having to look for another 44-584, I checked out the front wheel tire of the same bike. This is a 40-609 with a familiar 50 PSI or 350 kPa. Actually, I always thought those data too high. The tire gets super tight. So perhaps 35 is more reasonable even tho compared to what is usually there, much lower? -609 tire? WTF? Did you mean -590?? -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#4
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Favorit hub and 35 PSI tire
AMuzi wrote:
-609 tire? WTF? Did you mean -590?? Shinko Golden Boy 40-609 or 27 x 1 1/2 50 psi or 350 kPa Made in Korea. There is no queen of tires? -- underground experts united http://user.it.uu.se/~embe8573 |
#5
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Favorit hub and 35 PSI tire
Actually, now that I think about it the 27" or
609 wheel looks much better. It is probably a 27" bike! The 26" or 584 wheel is too small so it got its way there later, I think. And it makes sense politically as well because pompous old Crescent probably wouldn't do with Eastern bloc industrial imitations... -- underground experts united http://user.it.uu.se/~embe8573 |
#6
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Favorit hub and 35 PSI tire
AMuzi wrote:
-609 tire? WTF? Did you mean -590?? .... now I'm uncertain. When you said it it sounded like you thought it was a strange tire size. But maybe you thought it was strange because it was so different from the other tire (rear 584, front 609)? Because I just went downstairs and looked for 27" rear wheels, and only looking at those who had tires, I found no less than four 27"s, all 40-609 or 27 x 1 1/2. They were all Torpedoes: one single speed, two three speeds, and one duomatic. -- underground experts united http://user.it.uu.se/~embe8573 |
#7
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Favorit hub and 35 PSI tire
Today I found an inner tube that fits according
to the ISO mark, and is close enough to the inch mark - it fails on the diameter tho (tire 27, tube 28) which is the most important one. And the ISO interval is wide indeed. But should be fine, for sure. Here is what it says on the box: CST (Cheng Shin Tire) 700C 28 x 1 5/8 x 1 3/8 37/47-609/642 It has a 40 mm Dunlop valve. The 700 is the old French system or outer diameter (diameter including tire), right? But what does the "C" mean? -- underground experts united http://user.it.uu.se/~embe8573 |
#8
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Favorit hub and 35 PSI tire
On the old tube, Made in Taiwan, are three
markings, the most prominent being exactly 27 * 1 1/2 (40-609) There is also two others: 27 * 1 3/8 (37-630) 27 * 1 3/8 * 1 1/2 (37-609) Does this mean the tube is 40-609 but will work for 37-630 and 37-609 as well? But why not -622 then? -- underground experts united http://user.it.uu.se/~embe8573 |
#9
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Favorit hub and 35 PSI tire
On 6/20/2017 8:18 AM, Emanuel Berg wrote:
Today I found an inner tube that fits according to the ISO mark, and is close enough to the inch mark - it fails on the diameter tho (tire 27, tube 28) which is the most important one. And the ISO interval is wide indeed. But should be fine, for sure. Here is what it says on the box: CST (Cheng Shin Tire) 700C 28 x 1 5/8 x 1 3/8 37/47-609/642 It has a 40 mm Dunlop valve. The 700 is the old French system or outer diameter (diameter including tire), right? But what does the "C" mean? '700' originally were large at 642mm, later referred to as 700A. The revised format 700B got smaller (625? can't recall), the current 700C smaller yet at 622m. (700D 587mm utterly failed in the late 1980s) -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#10
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Favorit hub and 35 PSI tire
AMuzi wrote:
'700' originally were large at 642mm, later referred to as 700A. The revised format 700B got smaller (625? can't recall), the current 700C smaller yet at 622m. (700D 587mm utterly failed in the late 1980s) Aha, cool! Because I take it the rim walls and tires didn't get correspondingly higher I suppose the 700 just stuck as a designation and doesn't mean 700 mm anymore... Or does it? Because one unmounted 42-622 tire that I have here seems to be pretty damn close to 70 cm! -- underground experts united http://user.it.uu.se/~embe8573 |
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