Closed chain guard
#1
Got an old Peugeot
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Closed chain guard
Hi,
Is there a closed box for keeping all the drive system closed?
I'm talking about keeping all the moving part inside the box. This will keep them clean.
I saw something like this for single speed city bikes, but none for Shimano derailleur systems.
Thanks,
Kfir
Is there a closed box for keeping all the drive system closed?
I'm talking about keeping all the moving part inside the box. This will keep them clean.
I saw something like this for single speed city bikes, but none for Shimano derailleur systems.
Thanks,
Kfir
#2
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There's no such thing as a completely closed chain guard made for full derailler set up.
I mean, you could always fabricate one, or have one fabricated, but nothing currently exists like that.
-Gene-
I mean, you could always fabricate one, or have one fabricated, but nothing currently exists like that.
-Gene-
#3
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Kfir
#4
Bicycle Repair Man !!!
Full chain cases typically come with internal gear hubs... fabricating a chain case for a derailleur system would have to take into account the derailleur and the fact it moves laterally and is deeper vertically.
A full chain case is a beautiful thing and will extend the lifespan of a drive train and chain like you would not believe... and does an amazing job of keeping it clean.
A full chain case is a beautiful thing and will extend the lifespan of a drive train and chain like you would not believe... and does an amazing job of keeping it clean.
#5
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features a fully-enclosed derailleur system. This is in contrast to the previous Go-One 3:
I do realize that velomobiles are outside the experience of most cyclists... but they do exist!
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#6
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Full chain cases typically come with internal gear hubs... fabricating a chain case for a derailleur system would have to take into account the derailleur and the fact it moves laterally and is deeper vertically.
A full chain case is a beautiful thing and will extend the lifespan of a drive train and chain like you would not believe... and does an amazing job of keeping it clean.
A full chain case is a beautiful thing and will extend the lifespan of a drive train and chain like you would not believe... and does an amazing job of keeping it clean.
I was asking that because I don't want to clean the drive chain any more! I'm like a slave of my bike ;-)
Internal gears are very pricey. This is why I'm looking for a closed box for the drive train.
Kfir
#7
Bicycle Repair Man !!!
Jeff - I would so love to own a velo-mobile... with a Bionx assist.
Kfir - The initial cost of an internally geared system is more than that of many derailleur setups but over the long haul the decreased need for service and longer lifespan will pay for itself.
Kfir - The initial cost of an internally geared system is more than that of many derailleur setups but over the long haul the decreased need for service and longer lifespan will pay for itself.
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It should cost more in the 200$ range IMO.
Kfir
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Full fenders with a LONG mudflap on the front will give you 80% of the benefit of a chaincase as far as keeping crud off the drivetrain and infinity% of the benefit of a chaincase as far as keeping your feet dry. One is still susceptible to the dreaded chainring tattoo though.
Wasn't there a downhill MTB made with a gearbox in the frame, which, when opened, contained a regular derailleur system?
Wasn't there a downhill MTB made with a gearbox in the frame, which, when opened, contained a regular derailleur system?
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could get belt drive, but those are limited to IGH.
couple up a belt drive with shimano nexus or alfine, that should be pretty good...
couple up a belt drive with shimano nexus or alfine, that should be pretty good...
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
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Full fenders with a LONG mudflap on the front will give you 80% of the benefit of a chaincase as far as keeping crud off the drivetrain and infinity% of the benefit of a chaincase as far as keeping your feet dry. One is still susceptible to the dreaded chainring tattoo though.
Wasn't there a downhill MTB made with a gearbox in the frame, which, when opened, contained a regular derailleur system?
Wasn't there a downhill MTB made with a gearbox in the frame, which, when opened, contained a regular derailleur system?
I don't think this will solve the problem. Again, closed system will be better.
Kfir
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have you seen about the alfine 11 speed that's supposed to be coming out soon?
https://road.cc/content/news/13981-sh...-car-park-test
https://road.cc/content/news/13981-sh...-car-park-test
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Well, that's the top of the market, isn't it?
There are several good hubs from people like Sturmey Archer and Shimano available for far less.
A fully enclosed full derailleur system would need to be massive. Tall enough at the rear to enclose the derailleur, and wide enough to accomodate the full range of lateral movement.
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combine IGH with an sram hammershmidt?
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
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Still, it's not like it's rocket science. Getting the chain reasonably well protected from above is easily doable. Start off with the biggest chain case you can find and either some thin sheet metal aluminium, or something like a sheet of Lexan from a R/C hobby store. A roll of assembly grade double sided sticky tape, some hand tools and you're all set to start crafting. You might want to use cardboard to make up templates first.
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To get a fully enclosed chain case for a front and rear derailer system you'd need to build an awfully big box, or one with a couple of protrusions. And you might encounter some interference issues between chain case and spokes up by the cassette.
Still, it's not like it's rocket science. Getting the chain reasonably well protected from above is easily doable. Start off with the biggest chain case you can find and either some thin sheet metal aluminium, or something like a sheet of Lexan from a R/C hobby store. A roll of assembly grade double sided sticky tape, some hand tools and you're all set to start crafting. You might want to use cardboard to make up templates first.
Still, it's not like it's rocket science. Getting the chain reasonably well protected from above is easily doable. Start off with the biggest chain case you can find and either some thin sheet metal aluminium, or something like a sheet of Lexan from a R/C hobby store. A roll of assembly grade double sided sticky tape, some hand tools and you're all set to start crafting. You might want to use cardboard to make up templates first.
#19
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Also, many IGH have an lower torque limit, which effectively limits how low of a gear they can have. You can always ignore this at the expense of the warranty, but the risk is yours.
#20
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The Rohloff is expensive due to multiple factors. It is made in Germany in limited numbers and assembled by hand per a video that has been linked to on BF IIRC. The Schlumpf is made in Switzerland which has even higher labor rates than Germany. Even the Shimano 8 speed hub, made in much larger quantities in a lower lbor rate setting and with more automated assembly, does not meet the $200 price point mentioned. A lot of small precision parts go into a 8 speed or more complex IGH.
Commercial derailleur drivetrain full chaincases are not available for several reasons IMO. They would need to be large and due to dimensional differences between various frames it would be difficult to make one that fit more than one model of bike and chainring/cassette combination.
Commercial derailleur drivetrain full chaincases are not available for several reasons IMO. They would need to be large and due to dimensional differences between various frames it would be difficult to make one that fit more than one model of bike and chainring/cassette combination.
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Gear Hubs Owned: Rohloff disc brake, SRAM iM9 disc brake, SRAM P5 freewheel, Sachs Torpedo 3 speed freewheel, NuVinci CVT, Shimano Alfine SG S-501, Sturmey Archer S5-2 Alloy. Other: 83 Colnago Super Record, Univega Via De Oro
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#21
Bicycle Repair Man !!!
The 2 speed bottom brackets are expensive because they are not mass produced like Shimano's IGH hubs and perhaps Shimano will offer a 2 speed bb at some point to expand he range of their IGH hubs... I have heard rumours of this happening.
The range on the Alfine is pretty decent and is best suited for commuting and touring where you have more bottom end for climbing and might max out at about 80 gear inches at the top... unless you are racing this is a perfect top gear for most people.
I get by pretty well with a 3 speed IGH... my better half loves her 8 speed.
The range on the Alfine is pretty decent and is best suited for commuting and touring where you have more bottom end for climbing and might max out at about 80 gear inches at the top... unless you are racing this is a perfect top gear for most people.
I get by pretty well with a 3 speed IGH... my better half loves her 8 speed.
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Fully enclosed chainsets for derailleurs are a custom/hand-made project.
I would try prototyping with some correx, ductape and wooden spacers to get the dimensions that avoid interference.
The only potential issue is that you cant see which gear combo you are in.
You may find the rear-most inside part interfering with spokes.
I would try prototyping with some correx, ductape and wooden spacers to get the dimensions that avoid interference.
The only potential issue is that you cant see which gear combo you are in.
You may find the rear-most inside part interfering with spokes.