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Shimano Nexus rear hub
I'm beginning to see these geared hubs on some of the cheaper flat bar road bikes here and am sort of wondering whether they might be just the thing for riding in Bangkok. Bangkok is built on an alluvial plain and is essentially flat. The largest "hills" I encounter riding here are the "hump back" bridges and if a bike has three gears (assuming the right ratio) it would be enough for the majority of my Bangkok riding. Given the added complexities of the usual front/rear derailer system I am wondering whether one of the various Shimano Nexus geared hubs might not be "just the thing". It seems to me that the chain would be similar to the old single speed chains that lasted forever and no derailers to keep in tune and sprockets and cogs to wear out. I am thinking that a 5 or 7 speed hub would more then cover all city riding assuming, of course, that the gear ratios were in the right range. I believe that with an odd number of rear gears, probably 5 or 7, if the middle gear was, say 60 gear inches, and the ratios were in say 10 - 15% steps that it would cover 99.9% of all the riding I do in Bangkok. Has anyone done this? Are rear cogs available in sufficient sizes to be able to set up any initial gear ratio that one desires? Do the hubs last? Any special loves/hates? Any suggestions, advice? -- cheers, John B. |
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#2
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Shimano Nexus rear hub
I have fifteen years of experience with hub drives, including two Shimano Nexus hubs. Slow Johnny is already going wrong, but since he makes a song and dance of not reading me, there's no point in helping him out.
Andre Jute Helpful to the deserving |
#3
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Shimano Nexus rear hub
On 15/12/2015 12:28, John B. wrote:
Given the added complexities of the usual front/rear derailer system I am wondering whether one of the various Shimano Nexus geared hubs might not be "just the thing". The 8 speeds have a decent reputation. Has anyone done this? Are rear cogs available in sufficient sizes to be able to set up any initial gear ratio that one desires? Do the hubs last? Any special loves/hates? They do work. I don't especially like them, nor do I especially hate them. For a commute/utility/pottering bike they make a lot of sense IMO. |
#4
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Shimano Nexus rear hub
On 12/15/2015 6:28 AM, John B. wrote:
I'm beginning to see these geared hubs on some of the cheaper flat bar road bikes here and am sort of wondering whether they might be just the thing for riding in Bangkok. Bangkok is built on an alluvial plain and is essentially flat. The largest "hills" I encounter riding here are the "hump back" bridges and if a bike has three gears (assuming the right ratio) it would be enough for the majority of my Bangkok riding. Given the added complexities of the usual front/rear derailer system I am wondering whether one of the various Shimano Nexus geared hubs might not be "just the thing". It seems to me that the chain would be similar to the old single speed chains that lasted forever and no derailers to keep in tune and sprockets and cogs to wear out. I am thinking that a 5 or 7 speed hub would more then cover all city riding assuming, of course, that the gear ratios were in the right range. I believe that with an odd number of rear gears, probably 5 or 7, if the middle gear was, say 60 gear inches, and the ratios were in say 10 - 15% steps that it would cover 99.9% of all the riding I do in Bangkok. Has anyone done this? Are rear cogs available in sufficient sizes to be able to set up any initial gear ratio that one desires? Do the hubs last? Any special loves/hates? Any suggestions, advice? -- cheers, John B. My daughter enjoys her Raleigh in Chicago with Shimano 8 gearbox on a flat bar road bike (discontinued model Alysa 8). For regular city use, rider needs a wrench to change the rear when flat but the Shimano gear linkage is simple and quick with fingers only. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#5
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Shimano Nexus rear hub
John B. wrote:
:Has anyone done this? Are rear cogs available in sufficient sizes to :be able to set up any initial gear ratio that one desires? Do the hubs :last? Any special loves/hates? :Any suggestions, advice? My commuter has an 8 speed alfine. Works fine, requires little maintance. The 8 covers a pretty reasonable range, but the steps are big. I replace the chain once a year, at the end of winter. You don't ride in salted road slush, so you'd get better life. There's a good selection of rear cogs available, and you can change the crank ring, too. I had to change a couple times when I first set the bike up, but a little more thought would have prevented that. I'm in chicago, which is pretty flat. (My joke in chicago is that you need two gears, but they're different in the morning and evening.) plenty of people ride single and fixed gears here, and they all complain they do't have the right gear. -- sig 123 |
#6
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Shimano Nexus rear hub
On 12/15/2015 7:28 AM, John B. wrote:
I'm beginning to see these geared hubs on some of the cheaper flat bar road bikes here and am sort of wondering whether they might be just the thing for riding in Bangkok. Bangkok is built on an alluvial plain and is essentially flat. The largest "hills" I encounter riding here are the "hump back" bridges and if a bike has three gears (assuming the right ratio) it would be enough for the majority of my Bangkok riding. Given the added complexities of the usual front/rear derailer system I am wondering whether one of the various Shimano Nexus geared hubs might not be "just the thing". It seems to me that the chain would be similar to the old single speed chains that lasted forever and no derailers to keep in tune and sprockets and cogs to wear out. I am thinking that a 5 or 7 speed hub would more then cover all city riding assuming, of course, that the gear ratios were in the right range. I believe that with an odd number of rear gears, probably 5 or 7, if the middle gear was, say 60 gear inches, and the ratios were in say 10 - 15% steps that it would cover 99.9% of all the riding I do in Bangkok. Has anyone done this? Are rear cogs available in sufficient sizes to be able to set up any initial gear ratio that one desires? Do the hubs last? Any special loves/hates? Any suggestions, advice? I have no first-hand knowledge, but I thought that Shimano's 7 speed hubs had a less-than-stellar reputation for reliability. You might find this discussion interesting: http://www.bikeforums.net/bicycle-me...y-8-speed.html -- - Frank Krygowski |
#7
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Shimano Nexus rear hub
On 15/12/15 13:28, John B. wrote:
I'm beginning to see these geared hubs on some of the cheaper flat bar road bikes here and am sort of wondering whether they might be just the thing for riding in Bangkok. Bangkok is built on an alluvial plain and is essentially flat. The largest "hills" I encounter riding here are the "hump back" bridges and if a bike has three gears (assuming the right ratio) it would be enough for the majority of my Bangkok riding. Given the added complexities of the usual front/rear derailer system I am wondering whether one of the various Shimano Nexus geared hubs might not be "just the thing". It seems to me that the chain would be similar to the old single speed chains that lasted forever and no derailers to keep in tune and sprockets and cogs to wear out. I am thinking that a 5 or 7 speed hub would more then cover all city riding assuming, of course, that the gear ratios were in the right range. I believe that with an odd number of rear gears, probably 5 or 7, if the middle gear was, say 60 gear inches, and the ratios were in say 10 - 15% steps that it would cover 99.9% of all the riding I do in Bangkok. Has anyone done this? Are rear cogs available in sufficient sizes to be able to set up any initial gear ratio that one desires? Do the hubs last? Any special loves/hates? Any suggestions, advice? The Nexus 8 is excellent in terms of reliability and shifting. However, I didn't like the gear ratios so much because they are similar to cassettes meaning 7-8 is 5/5ths of ****all. However, I did a spreadsheet I can dig up for my commuting, which span out at about 25 and a bit mph, 1st gear was low enough for anything I cam across. I'm running an 11 now, which skips occasionally and doesn't shift as well under load, so I'd put the 8 in front by a nose. |
#8
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Shimano Nexus rear hub
On 15/12/15 19:57, Frank Krygowski wrote:
On 12/15/2015 7:28 AM, John B. wrote: I'm beginning to see these geared hubs on some of the cheaper flat bar road bikes here and am sort of wondering whether they might be just the thing for riding in Bangkok. Bangkok is built on an alluvial plain and is essentially flat. The largest "hills" I encounter riding here are the "hump back" bridges and if a bike has three gears (assuming the right ratio) it would be enough for the majority of my Bangkok riding. Given the added complexities of the usual front/rear derailer system I am wondering whether one of the various Shimano Nexus geared hubs might not be "just the thing". It seems to me that the chain would be similar to the old single speed chains that lasted forever and no derailers to keep in tune and sprockets and cogs to wear out. I am thinking that a 5 or 7 speed hub would more then cover all city riding assuming, of course, that the gear ratios were in the right range. I believe that with an odd number of rear gears, probably 5 or 7, if the middle gear was, say 60 gear inches, and the ratios were in say 10 - 15% steps that it would cover 99.9% of all the riding I do in Bangkok. Has anyone done this? Are rear cogs available in sufficient sizes to be able to set up any initial gear ratio that one desires? Do the hubs last? Any special loves/hates? Any suggestions, advice? I have no first-hand knowledge, but I thought that Shimano's 7 speed hubs had a less-than-stellar reputation for reliability. You might find this discussion interesting: http://www.bikeforums.net/bicycle-me...y-8-speed.html I have to say I'd disagree with pretty much all of that. My 8 went past 10,000 miles before being relegated to a less used bike, in temperatures from -20[1] up to 35+. All year commuting, rain, snow, ice, in a sandy environment plus salt and grit in the winter. They don't last forever, and I reckon hard use 15K would be possible with no maintenance. It isn't that hard to get the internals out, but I couldn't be bothered in the end. [1] I took a photograph of the fridge thermometer I took in that day, but the picture went with the phone when it was stolen. |
#9
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Shimano Nexus rear hub
On Tuesday, December 15, 2015 at 7:47:58 PM UTC, Tosspot wrote:
You might find this discussion interesting: http://www.bikeforums.net/bicycle-me...y-8-speed.html I have to say I'd disagree with pretty much all of that. My 8 went past 10,000 miles before being relegated to a less used bike, in temperatures from -20[1] up to 35+. All year commuting, rain, snow, ice, in a sandy environment plus salt and grit in the winter. They don't last forever, and I reckon hard use 15K would be possible with no maintenance. It isn't that hard to get the internals out, but I couldn't be bothered in the end. I wore out two Shimano 8 speed hub gearboxes under 5000 miles. By contrast, a Rohloff box was just nicely run in approaching 10,000. All the same, I liked the Shimano boxes as a cheap alternative to derailleurs. At the actual street price for a Shimano gearbox and fitting kit, you can afford to fit a new box every 5000 miles. The Rohloff is superior in use and lasts forever, but at that price you want to know you'll keep and use it for many years; it's not a trivial, trendy purchase, like a Shimano 8 speed, nor for the sort of people who change their bikes more often than their underwear. Andre Jute Always the vivid phrase |
#10
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Shimano Nexus rear hub
On 16/12/15 00:09, AMuzi wrote:
On 12/15/2015 6:28 AM, John B. wrote: I'm beginning to see these geared hubs on some of the cheaper flat bar road bikes here and am sort of wondering whether they might be just the thing for riding in Bangkok. Bangkok is built on an alluvial plain and is essentially flat. The largest "hills" I encounter riding here are the "hump back" bridges and if a bike has three gears (assuming the right ratio) it would be enough for the majority of my Bangkok riding. Given the added complexities of the usual front/rear derailer system I am wondering whether one of the various Shimano Nexus geared hubs might not be "just the thing". It seems to me that the chain would be similar to the old single speed chains that lasted forever and no derailers to keep in tune and sprockets and cogs to wear out. I am thinking that a 5 or 7 speed hub would more then cover all city riding assuming, of course, that the gear ratios were in the right range. I believe that with an odd number of rear gears, probably 5 or 7, if the middle gear was, say 60 gear inches, and the ratios were in say 10 - 15% steps that it would cover 99.9% of all the riding I do in Bangkok. Has anyone done this? Are rear cogs available in sufficient sizes to be able to set up any initial gear ratio that one desires? Do the hubs last? Any special loves/hates? Any suggestions, advice? -- cheers, John B. My daughter enjoys her Raleigh in Chicago with Shimano 8 gearbox on a flat bar road bike (discontinued model Alysa 8). For regular city use, rider needs a wrench to change the rear when flat but the Shimano gear linkage is simple and quick with fingers only. Why not install large wingnuts on the axle ends, for wrench free wheel removal? Worried about wheel theft? http://www.amazon.co.uk/Retro-bicycl.../dp/B008H0P5Z0 -- JS |
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