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#1
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609 bike questions [photo]
Here is the 609 Crescent open-frame I talked
about earlier. I had to replace the old Czech single-speed Favorite-hub rear wheel and do some other things as well. But now it is up and running with two nice 609 or 27" x 1 1/2 tires mounted! I've heard of a trick to determine if a bike is a 26" or a 28" by just looking at a photo of it. Anyone know the way? And does it work for 27" bikes as well? Except for the 609 wheel size, the bike has an exciting handlebar with the handles all but parallel to the direction of the bike. Anyone knows what that type of handlebar is called or any other "facts for fans"? Also, take a look at the fork. This I see all the time. But modern bikes seem to be forged in one piece. What's the story on that? Photos: http://user.it.uu.se/~embe8573/bike/609/side.jpg http://user.it.uu.se/~embe8573/bike/...r-and-fork.jpg PS. With the first photo, I didn't use the flash; on the second, I did. What photo looks better to you in this respect? -- underground experts united http://user.it.uu.se/~embe8573 |
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#2
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609 bike questions [photo]
On Tuesday, July 4, 2017 at 8:25:00 AM UTC-4, Emanuel Berg wrote:
Here is the 609 Crescent open-frame I talked about earlier. I had to replace the old Czech single-speed Favorite-hub rear wheel and do some other things as well. But now it is up and running with two nice 609 or 27" x 1 1/2 tires mounted! I've heard of a trick to determine if a bike is a 26" or a 28" by just looking at a photo of it. Anyone know the way? And does it work for 27" bikes as well? Except for the 609 wheel size, the bike has an exciting handlebar with the handles all but parallel to the direction of the bike. Anyone knows what that type of handlebar is called or any other "facts for fans"? Also, take a look at the fork. This I see all the time. But modern bikes seem to be forged in one piece. What's the story on that? Photos: http://user.it.uu.se/~embe8573/bike/609/side.jpg http://user.it.uu.se/~embe8573/bike/...r-and-fork.jpg PS. With the first photo, I didn't use the flash; on the second, I did. What photo looks better to you in this respect? -- underground experts united http://user.it.uu.se/~embe8573 That stem looks to be pretty tall. Check and make surethat the minimum insertion mark is BELOW the top nut of the headset. Otherwise the stem could break. I'd also get rid of the headlight mounting bracket thats under the stem bolt. If you must have a headlight mount like that then move it to where the front reflector bracket is now. You don't want anything on the stem that could cause that long binder bolt to come loose and cause the stem and bars to rotate thereby loosing control of your steering. Cheers |
#3
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609 bike questions [photo]
Sir Ridesalot wrote:
That stem looks to be pretty tall. Check and make surethat the minimum insertion mark is BELOW the top nut of the headset. Otherwise the stem could break. It absolutely does however there is no mark above the top nut. There is a script higher up, saying stainless steel, so I don't think it (the mark) is wrenched away either. Or could it be? I mean, are stems that tall very uncommon to the point it is likely it is pulled up way too high? I'd also get rid of the headlight mounting bracket thats under the stem bolt. If you must have a headlight mount like that then move it to where the front reflector bracket is now. The front reflector bracket will get a front reflector. The headlight mount will probably be unused as it'll get fisheyes back and front. You don't want anything on the stem that could cause that long binder bolt to come loose and cause the stem and bars to rotate thereby loosing control of your steering. I suppose I agree but I think it is the original components and probably they have been that way for decades. Nothing I want to muck around with. The wedge on these bikes are often insanely stuck with rust by now and the guy who gets the bike will not thank me for the extra efforts. -- underground experts united http://user.it.uu.se/~embe8573 |
#4
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609 bike questions [photo]
On Tuesday, July 4, 2017 at 10:00:58 AM UTC-4, Emanuel Berg wrote:
Sir Ridesalot wrote: That stem looks to be pretty tall. Check and make surethat the minimum insertion mark is BELOW the top nut of the headset. Otherwise the stem could break. It absolutely does however there is no mark above the top nut. There is a script higher up, saying stainless steel, so I don't think it (the mark) is wrenched away either. Or could it be? I mean, are stems that tall very uncommon to the point it is likely it is pulled up way too high? I'd also get rid of the headlight mounting bracket thats under the stem bolt. If you must have a headlight mount like that then move it to where the front reflector bracket is now. The front reflector bracket will get a front reflector. The headlight mount will probably be unused as it'll get fisheyes back and front. You don't want anything on the stem that could cause that long binder bolt to come loose and cause the stem and bars to rotate thereby loosing control of your steering. I suppose I agree but I think it is the original components and probably they have been that way for decades. Nothing I want to muck around with. The wedge on these bikes are often insanely stuck with rust by now and the guy who gets the bike will not thank me for the extra efforts. -- underground experts united http://user.it.uu.se/~embe8573 CHECK that stem and make sure there's at lest 2 inches (5cms)of it BELOW the top locknut - more if there's any space between the top lock nut and the fork steerer tube. The guy will NOT like it if he hits a bump/pothole and the stem breaks off or comes off the bike. There was a guy here in town who fixed bikes and then sold them cheap. He wanted me to help him. I was working on one bike one day and noticed the bike he was working on had the stem quite high. I checked the amount that was inside the fork and it was less than half an inch (1.2cm). I lowered the stem, the guy got mad nd raised it again and I left never to return. Cheers |
#5
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609 bike questions [photo]
On Tue, 04 Jul 2017 14:24:55 +0200, Emanuel Berg
wrote: Here is the 609 Crescent open-frame I talked about earlier. I had to replace the old Czech single-speed Favorite-hub rear wheel and do some other things as well. But now it is up and running with two nice 609 or 27" x 1 1/2 tires mounted! I've heard of a trick to determine if a bike is a 26" or a 28" by just looking at a photo of it. Anyone know the way? And does it work for 27" bikes as well? Except for the 609 wheel size, the bike has an exciting handlebar with the handles all but parallel to the direction of the bike. Anyone knows what that type of handlebar is called or any other "facts for fans"? they look like normal bicycle handle bars. I see similar handlebars on bikes being used for shopping here every day. With breaks and shifter http://tinyurl.com/y9v59qvg Also, take a look at the fork. This I see all the time. But modern bikes seem to be forged in one piece. What's the story on that? The fork looks normal. Made up of 4 parts brazed together. A more "modern" way might be to use fork blades with a bend on their top to replace the fork crown and weld them directly to the steerer tube. A cheaper method of making a fork. See http://tinyurl.com/ydyj3ckr Photos: http://user.it.uu.se/~embe8573/bike/609/side.jpg http://user.it.uu.se/~embe8573/bike/...r-and-fork.jpg PS. With the first photo, I didn't use the flash; on the second, I did. What photo looks better to you in this respect? A bit of glare on the handle bar of the second photo. -- Cheers, John B. |
#6
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609 bike questions [photo]
On Tuesday, July 4, 2017 at 10:00:58 AM UTC-4, Emanuel Berg wrote:
Sir Ridesalot wrote: I'd also get rid of the headlight mounting bracket thats under the stem bolt. If you must have a headlight mount like that then move it to where the front reflector bracket is now. The front reflector bracket will get a front reflector. The headlight mount will probably be unused as it'll get fisheyes back and front. What are "fisheyes"? A bike ridden at night absolutely needs a proper headlight. If it's never going to be used at night, then eyes of fish might be as good as anything else, I suppose. - Frank Krygowski |
#7
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609 bike questions [photo]
John B. wrote:
they look like normal ... The fork looks normal. Yes, of course. It is a very normal bike -- underground experts united http://user.it.uu.se/~embe8573 |
#8
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609 bike questions [photo]
Frank Krygowski wrote:
What are "fisheyes"? http://images.biltema.com/PAXToImage...rge/2000039968 I think they are called that because the huge bulky lamps that were dynamo powered were called "cat eyes". A bike ridden at night absolutely needs a proper headlight. Indeed. I don't know how many lumen the fisheyes are tho. They are not enough when it is dark and you can't see, like in the forest, but in a city they are fine because you see anyway and they are more so that others will see you. -- underground experts united http://user.it.uu.se/~embe8573 |
#9
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609 bike questions [photo]
Sir Ridesalot wrote:
CHECK that stem and make sure there's at lest 2 inches (5cms)of it BELOW the top locknut - more if there's any space between the top lock nut and the fork steerer tube. The guy will NOT like it if he hits a bump/pothole and the stem breaks off or comes off the bike. My intuition was always that it was OK, but of course I would hate if someone got hurt from riding my bikes, not to mention (or I will mention it) [s]he would hate it even more, so I took the bike to a professional which operates a bike shop in the city. No doubt, the world of professional practitioners is only as good as its worst mechanic, but I trust this guy completely, he is from Persia/Iran with all its talented mechanics, and has tons of experience, anyway without even looking closely he said it was fine. I tried to provoke him to elaborate on that, but then he just grabbed the handlebar and torqued back and forth and repeated not to worry. -- underground experts united http://user.it.uu.se/~embe8573 |
#10
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609 bike questions [photo]
On Saturday, July 8, 2017 at 1:36:42 PM UTC-4, Emanuel Berg wrote:
Sir Ridesalot wrote: CHECK that stem and make sure there's at lest 2 inches (5cms)of it BELOW the top locknut - more if there's any space between the top lock nut and the fork steerer tube. The guy will NOT like it if he hits a bump/pothole and the stem breaks off or comes off the bike. My intuition was always that it was OK, but of course I would hate if someone got hurt from riding my bikes, not to mention (or I will mention it) [s]he would hate it even more, so I took the bike to a professional which operates a bike shop in the city. No doubt, the world of professional practitioners is only as good as its worst mechanic, but I trust this guy completely, he is from Persia/Iran with all its talented mechanics, and has tons of experience, anyway without even looking closely he said it was fine. I tried to provoke him to elaborate on that, but then he just grabbed the handlebar and torqued back and forth and repeated not to worry. -- underground experts united http://user.it.uu.se/~embe8573 NO GOOD! You need to make a mark with something where the stem is now. I use a marker or even a pencil. then you loosen the stem bolt and remove the stem and see how much is below the mark. If it's less than 5cm or 2 inches (at the start of thewedge) then the stem needs to go in further. Failure to have enough stem inside the steerer tube is risky as it can lead to the stem snpping off. It just takes a minute or so to check it so why not do it to be POSITIVEthe stem is in a SAFE distance? Cheers |
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