#1
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Pentasport issues
On the Torpedo Pentasport (5 gear) bikes, there
are often two small loop holes (?) on the chain stays to direct the wires. They remind of the same things on a casting rod directing the line. Those are most often not on the Torpedo 3 bikes, and I suspect this is because the wire there are on the opposite side of the chain guard, so there is no reason to keep the wire aligned to the chain stay (away from the chain guard). Once there, on the Pentasport, they might have thought "we might as well put another one on the other side as well". Another reason might be the control or hub mechanism, which require more power (?) so it is more important to better align the wire to the twin pulley wheels by the crank. A third reason (tho seeming more unlikely) is to align the gear chains certain ways coming out of the hub. What do you think? Another detail are the rubber "hats" on the hollow dome nuts to protect the chains I suppose when you put the bike in a rack etc. Anyone has a name for those? -- underground experts united http://user.it.uu.se/~embe8573 |
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#2
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Pentasport issues
On 4/21/2017 7:37 PM, Emanuel Berg wrote:
On the Torpedo Pentasport (5 gear) bikes, there are often two small loop holes (?) on the chain stays to direct the wires. They remind of the same things on a casting rod directing the line. Those are most often not on the Torpedo 3 bikes, and I suspect this is because the wire there are on the opposite side of the chain guard, so there is no reason to keep the wire aligned to the chain stay (away from the chain guard). Once there, on the Pentasport, they might have thought "we might as well put another one on the other side as well". Another reason might be the control or hub mechanism, which require more power (?) so it is more important to better align the wire to the twin pulley wheels by the crank. A third reason (tho seeming more unlikely) is to align the gear chains certain ways coming out of the hub. What do you think? Another detail are the rubber "hats" on the hollow dome nuts to protect the chains I suppose when you put the bike in a rack etc. Anyone has a name for those? Sturmey calls those 'indicator protector' Robot says: indikator mätare beskyddare In the case of the Sturmey plastic caps, they aren't particularly effective when the bike is dumped on the pavement at speed. The cap cuts through and the indicator is lost. The caps may help in a bike parking rack, at least somewhat, assuming any real damage is possible there. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#3
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Pentasport issues
AMuzi wrote:
Sturmey calls those 'indicator protector' Robot says: indikator mätare beskyddare Ha ha ha Sure a pretentious name, even more so in the robot translation! I dare say you could ask 100 bike professionals for that and not a single one would give you a pair of those tiny caps -- underground experts united http://user.it.uu.se/~embe8573 |
#4
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Pentasport issues
AMuzi wrote:
The caps may help in a bike parking rack, at least somewhat, assuming any real damage is possible there. Those chains are sometimes deformed, twisted and/or buckled. I always thought this happened when people forced their bikes into packed racks, including when other people were muscling *their* bikes in and out... Are you saying they only happen when the bike falls? That doesn't happen that often... but I suppose one time is enough and some of these bikes are decades old by now! It sure can't happen from normal usage, can it? -- underground experts united http://user.it.uu.se/~embe8573 |
#5
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Pentasport issues
AMuzi wrote:
Sturmey calls those 'indicator protector' Robot says: indikator mätare beskyddare What/who is Sturmey and does he/it has a name for the casting rod loop holes as well? -- underground experts united http://user.it.uu.se/~embe8573 |
#6
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Pentasport issues
On 4/21/2017 8:36 PM, Emanuel Berg wrote:
AMuzi wrote: Sturmey calls those 'indicator protector' Robot says: indikator mätare beskyddare What/who is Sturmey and does he/it has a name for the casting rod loop holes as well? Sturmey Archer developed the first popular multispeed gearboxes for bicycles. You meant this type of plastic cover, yes? https://www.tritoncycles.co.uk/compo...r-guard-p14736 -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#7
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Pentasport issues
AMuzi wrote:
Sturmey Archer developed the first popular multispeed gearboxes for bicycles. You meant this type of plastic cover, yes? https://www.tritoncycles.co.uk/compo...r-guard-p14736 Yes. -- underground experts united http://user.it.uu.se/~embe8573 |
#8
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Pentasport issues
AMuzi wrote in news
On 4/21/2017 8:36 PM, Emanuel Berg wrote: AMuzi wrote: Sturmey calls those 'indicator protector' Robot says: indikator mätare beskyddare What/who is Sturmey and does he/it has a name for the casting rod loop holes as well? Sturmey Archer developed the first popular multispeed gearboxes for bicycles. You meant this type of plastic cover, yes? https://www.tritoncycles.co.uk/compo...ewers-c122/stu rmey-archer-hsl711-r-h-indicator-guard-p14736 Wow, interesting site! I saw this, http://preview.tinyurl.com/SAaxelkey, and flashed back to 1968 and my three-speed Supercycle (actually a Raleigh with different head badge and decals) when I took the rear hub apart as far as I dared. That's my "Goldbrick" selling for CAD59.95 at the top of the left- hand page. https://threespeedmania.files.wordpr...-72.jpeg?w=590 -- Andrew Chaplin SIT MIHI GLADIUS SICUT SANCTO MARTINO (If you're going to e-mail me, you'll have to get "yourfinger." out.) |
#9
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Pentasport issues
Andrew Chaplin wrote:
Wow, interesting site! I saw this, http://preview.tinyurl.com/SAaxelkey, and flashed back to 1968 and my three-speed Supercycle (actually a Raleigh with different head badge and decals) when I took the rear hub apart as far as I dared. That's my "Goldbrick" selling for CAD59.95 at the top of the left- hand page. https://threespeedmania.files.wordpr...-72.jpeg?w=590 We don't have many British hubs here at all for some reason. The Germans must have done a good job nearly monopolizing the market. There are also some eastern-block hubs that look very much like the Torpedos. -- underground experts united http://user.it.uu.se/~embe8573 |
#10
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Pentasport issues
On 4/22/2017 11:13 AM, Andrew Chaplin wrote:
AMuzi wrote in news On 4/21/2017 8:36 PM, Emanuel Berg wrote: AMuzi wrote: Sturmey calls those 'indicator protector' Robot says: indikator mätare beskyddare What/who is Sturmey and does he/it has a name for the casting rod loop holes as well? Sturmey Archer developed the first popular multispeed gearboxes for bicycles. You meant this type of plastic cover, yes? https://www.tritoncycles.co.uk/compo...ewers-c122/stu rmey-archer-hsl711-r-h-indicator-guard-p14736 Wow, interesting site! I saw this, http://preview.tinyurl.com/SAaxelkey, and flashed back to 1968 and my three-speed Supercycle (actually a Raleigh with different head badge and decals) when I took the rear hub apart as far as I dared. That's my "Goldbrick" selling for CAD59.95 at the top of the left- hand page. https://threespeedmania.files.wordpr...-72.jpeg?w=590 That's the hard way around. Next time, remove the left cone and locknut and then undo the complete gear assembly as a unit. Rebuilds are done at the bench in a vise, notably setting the right side cone adjustment before installing the gear assembly back in the hub shell. http://www.sturmey-archerheritage.co...s/view-837.pdf -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
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