I stand corrected about sus fork usage on a commuting bike...
#1
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I stand corrected about sus fork usage on a commuting bike...
... it appears that after the winter I now have slight punctate spots of rust on both of my stanchions (Rock Shox Dart 3) and that some cheap-looking aluminum foil-like substance is peeling upward.
it's above where the stanchion travels into the lower body.
what should i do about it?
just run them until the don't compress anymore and trade them out for a solid disk brake-compatible MTB fork?
it's above where the stanchion travels into the lower body.
what should i do about it?
just run them until the don't compress anymore and trade them out for a solid disk brake-compatible MTB fork?
#2
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The very same thing happened to my Rock Shox fork about a month ago. Cold temperatures made it so it would just compress and rebound back hard at me. I took it apart and found that peeling away of material just as you explained. I would have wanted to upgrade to a higher quality unit but they are very pricey for anything good and decided it was not worth it for me as most of my riding is on paved roads with some gravel trails for short cuts on my commute and the occasional recreational ride on the MUP's. I decided to get a rigid fork and went the Surly Troll in a suspension compensated size and have yet to install it. To answer your question, I don't think anything can be done about the peeling. I just lubed mine up and still using it until this weekend.
#3
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I'll run it and see what happens.
I'm not super excited about the quality of the product but at €699 Cube had to cut corners somewhere.
Also, I could see how it could work for a weekend rider who clean their bike thoroughly every weekend, but that's not going to happen with a daily-ridden bike, especially not by me.
Let me know how the forks work out once you get them on the bike as I might be looking for a set at some point.
I'm not super excited about the quality of the product but at €699 Cube had to cut corners somewhere.
Also, I could see how it could work for a weekend rider who clean their bike thoroughly every weekend, but that's not going to happen with a daily-ridden bike, especially not by me.
Let me know how the forks work out once you get them on the bike as I might be looking for a set at some point.
#4
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I'll run it and see what happens.
I'm not super excited about the quality of the product but at €699 Cube had to cut corners somewhere.
Also, I could see how it could work for a weekend rider who clean their bike thoroughly every weekend, but that's not going to happen with a daily-ridden bike, especially not by me.
Let me know how the forks work out once you get them on the bike as I might be looking for a set at some point.
I'm not super excited about the quality of the product but at €699 Cube had to cut corners somewhere.
Also, I could see how it could work for a weekend rider who clean their bike thoroughly every weekend, but that's not going to happen with a daily-ridden bike, especially not by me.
Let me know how the forks work out once you get them on the bike as I might be looking for a set at some point.
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#6
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... it appears that after the winter I now have slight punctate spots of rust on both of my stanchions (Rock Shox Dart 3) and that some cheap-looking aluminum foil-like substance is peeling upward.
it's above where the stanchion travels into the lower body.
what should i do about it?
just run them until the don't compress anymore and trade them out for a solid disk brake-compatible MTB fork?
it's above where the stanchion travels into the lower body.
what should i do about it?
just run them until the don't compress anymore and trade them out for a solid disk brake-compatible MTB fork?
Your first course of action should be to determine if this is a warranty issue. I have no idea what the warranty for bikes and parts is in Germany but you should go talk to the dealer that sold you the bike anyway. You may be surprised.
Even if this isn't covered by a warranty, it's not the end of the world...nor the fork. The Dart 3 is a coil/elastomer fork...that's why it didn't work so well in the cold for droy45. It has an oil damper in one of the legs that can be drained and the fork will become just a spring fork. It will be a little bouncy but still usable as a suspension fork. The original Rockshox and Manitou forks were just coil/elastomer forks and they were ridden off-road in gnarly conditions.
If you do feel the need to replace the fork, you could go with a rigid fork or you could go with a higher level air fork. Fleabay can be your friend for either.
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Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
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Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
#7
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First, don't panic. You don't need to run out and purchase a rigid fork today. Your fork probably has several months...if not years...of life left in it.
Your first course of action should be to determine if this is a warranty issue. I have no idea what the warranty for bikes and parts is in Germany but you should go talk to the dealer that sold you the bike anyway. You may be surprised.
Even if this isn't covered by a warranty, it's not the end of the world...nor the fork. The Dart 3 is a coil/elastomer fork...that's why it didn't work so well in the cold for droy45. It has an oil damper in one of the legs that can be drained and the fork will become just a spring fork. It will be a little bouncy but still usable as a suspension fork. The original Rockshox and Manitou forks were just coil/elastomer forks and they were ridden off-road in gnarly conditions.
If you do feel the need to replace the fork, you could go with a rigid fork or you could go with a higher level air fork. Fleabay can be your friend for either.
Your first course of action should be to determine if this is a warranty issue. I have no idea what the warranty for bikes and parts is in Germany but you should go talk to the dealer that sold you the bike anyway. You may be surprised.
Even if this isn't covered by a warranty, it's not the end of the world...nor the fork. The Dart 3 is a coil/elastomer fork...that's why it didn't work so well in the cold for droy45. It has an oil damper in one of the legs that can be drained and the fork will become just a spring fork. It will be a little bouncy but still usable as a suspension fork. The original Rockshox and Manitou forks were just coil/elastomer forks and they were ridden off-road in gnarly conditions.
If you do feel the need to replace the fork, you could go with a rigid fork or you could go with a higher level air fork. Fleabay can be your friend for either.
I'm just upset because I can't believe that it rusted and that the shiny layer is peeling off
I just checked and it has the mandatory 2-year on all EU consumer goods, except 5 years against frame breakage.
How should I treat the rust? Can I just sand it off with the lightest paper/steel wool that I can find? Is there any sense in doing this? Basically, I'll ride the forks until they fall apart, I just wonder if I should remove the surface rust?
#8
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Thanks for the response.
I'm just upset because I can't believe that it rusted and that the shiny layer is peeling off
I just checked and it has the mandatory 2-year on all EU consumer goods, except 5 years against frame breakage.
How should I treat the rust? Can I just sand it off with the lightest paper/steel wool that I can find? Is there any sense in doing this? Basically, I'll ride the forks until they fall apart, I just wonder if I should remove the surface rust?
I'm just upset because I can't believe that it rusted and that the shiny layer is peeling off
I just checked and it has the mandatory 2-year on all EU consumer goods, except 5 years against frame breakage.
How should I treat the rust? Can I just sand it off with the lightest paper/steel wool that I can find? Is there any sense in doing this? Basically, I'll ride the forks until they fall apart, I just wonder if I should remove the surface rust?
I suspect the corrosion is salt related. I don't know if the legs are steel or aluminum alloy but I suspect that they are steel if you are seeing red/orange rust. You can remove the rust with several different chemicals. Here are some homemade ones but I can't vouch for their efficacy. You could use a dilute solution of salzsauer but be careful to rinse it off thoroughly. Buff it with steel wool or with a Scotch-brite pad afterward. Don't be too aggressive or you just scratch the legs and cause more problems. You'll probably have to do this on a regular basis because there's no good way to finish the steel that I can think of that wouldn't interfere with the fork seals.
The plating coming off is going to be an issue because you can't really replate the fork leg and the plating lets the legs move smoothly. You might be able to paint the legs with a smooth enamel but it's not going to last for any significant time. Try removing and buffing first. Keep it as simple as possible.
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Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
#9
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Are you outside the warranty?
I suspect the corrosion is salt related. I don't know if the legs are steel or aluminum alloy but I suspect that they are steel if you are seeing red/orange rust. You can remove the rust with several different chemicals. Here are some homemade ones but I can't vouch for their efficacy. You could use a dilute solution of salzsauer but be careful to rinse it off thoroughly. Buff it with steel wool or with a Scotch-brite pad afterward. Don't be too aggressive or you just scratch the legs and cause more problems. You'll probably have to do this on a regular basis because there's no good way to finish the steel that I can think of that wouldn't interfere with the fork seals.
The plating coming off is going to be an issue because you can't really replate the fork leg and the plating lets the legs move smoothly. You might be able to paint the legs with a smooth enamel but it's not going to last for any significant time. Try removing and buffing first. Keep it as simple as possible.
I suspect the corrosion is salt related. I don't know if the legs are steel or aluminum alloy but I suspect that they are steel if you are seeing red/orange rust. You can remove the rust with several different chemicals. Here are some homemade ones but I can't vouch for their efficacy. You could use a dilute solution of salzsauer but be careful to rinse it off thoroughly. Buff it with steel wool or with a Scotch-brite pad afterward. Don't be too aggressive or you just scratch the legs and cause more problems. You'll probably have to do this on a regular basis because there's no good way to finish the steel that I can think of that wouldn't interfere with the fork seals.
The plating coming off is going to be an issue because you can't really replate the fork leg and the plating lets the legs move smoothly. You might be able to paint the legs with a smooth enamel but it's not going to last for any significant time. Try removing and buffing first. Keep it as simple as possible.
I work as a bio/chemist, so I have access to every solvent imaginable.
What would you use?
edit: Do you mean Salzsäure ... Hydrocholic acid or HCl(aq)?
Last edited by acidfast7; 03-05-13 at 10:07 AM.
#10
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Second...Shhhh!...I was trying to keep the name on the QT. I figured to keep it from the plebes so that they don't run out and do something silly without knowing what they are doing and end up with a yellow puddle where their bike used to be.
Third, "a solution" implies a mixture with water or other solvent, not a gas. I suppose you could use HCl(gas) but it's a bit hard to handle.
Finally, why doesn't 'umlaut' have one?
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Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
#11
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#12
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It really is a piece of crap.
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Be gentle with trying to remove the rust, a rough surface makes it harder to maintain a good seal which leads to more wear on the surface..... or at least it is for motorcycles.
I rebuilt the front end on my older BMW (referred to as gummi kuh by the Germans), and it was pretty solid for something designed to give a softer ride. I looked at the suspension forks on my GFs Specialized Crossroads and figured I'd just replace them with a solid fork if she ever rode it enough to finish wearing them out.
I rebuilt the front end on my older BMW (referred to as gummi kuh by the Germans), and it was pretty solid for something designed to give a softer ride. I looked at the suspension forks on my GFs Specialized Crossroads and figured I'd just replace them with a solid fork if she ever rode it enough to finish wearing them out.
#14
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Be gentle with trying to remove the rust, a rough surface makes it harder to maintain a good seal which leads to more wear on the surface..... or at least it is for motorcycles.
I rebuilt the front end on my older BMW (referred to as gummi kuh by the Germans), and it was pretty solid for something designed to give a softer ride. I looked at the suspension forks on my GFs Specialized Crossroads and figured I'd just replace them with a solid fork if she ever rode it enough to finish wearing them out.
I rebuilt the front end on my older BMW (referred to as gummi kuh by the Germans), and it was pretty solid for something designed to give a softer ride. I looked at the suspension forks on my GFs Specialized Crossroads and figured I'd just replace them with a solid fork if she ever rode it enough to finish wearing them out.
https://commons.wikimedia.org/wiki/File:Gummikuh.jpg
#15
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#16
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Luckily, I have a Swedish keyboard with
ÄÖÅ by default
and can do an Alt-S to make "ß"
and can do an Alt-U to make "ü"
in addition it has a legal/degree key
° / §
and a greater than and less than key
<>
plus can do all of the accents
´ ` ^ ¨
also of great use is the ±
it makes typing in German/Swedish/English quite easy and makes technical writing a breeze
however it should be cleaned just like my bike
#17
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First, don't panic. You don't need to run out and purchase a rigid fork today. Your fork probably has several months...if not years...of life left in it.
Your first course of action should be to determine if this is a warranty issue. I have no idea what the warranty for bikes and parts is in Germany but you should go talk to the dealer that sold you the bike anyway. You may be surprised.
Even if this isn't covered by a warranty, it's not the end of the world...nor the fork. The Dart 3 is a coil/elastomer fork...that's why it didn't work so well in the cold for droy45. It has an oil damper in one of the legs that can be drained and the fork will become just a spring fork. It will be a little bouncy but still usable as a suspension fork. The original Rockshox and Manitou forks were just coil/elastomer forks and they were ridden off-road in gnarly conditions.
If you do feel the need to replace the fork, you could go with a rigid fork or you could go with a higher level air fork. Fleabay can be your friend for either.
Your first course of action should be to determine if this is a warranty issue. I have no idea what the warranty for bikes and parts is in Germany but you should go talk to the dealer that sold you the bike anyway. You may be surprised.
Even if this isn't covered by a warranty, it's not the end of the world...nor the fork. The Dart 3 is a coil/elastomer fork...that's why it didn't work so well in the cold for droy45. It has an oil damper in one of the legs that can be drained and the fork will become just a spring fork. It will be a little bouncy but still usable as a suspension fork. The original Rockshox and Manitou forks were just coil/elastomer forks and they were ridden off-road in gnarly conditions.
If you do feel the need to replace the fork, you could go with a rigid fork or you could go with a higher level air fork. Fleabay can be your friend for either.
#18
Banned
You can work your way into owning that Tout Terrain Bike, that you have mentioned so often,
By Buying their Fork.
My probably just as cheap, Spinner Fork on my Koga WTR has accordion boots from
above the slider, to the fork crown.
By Buying their Fork.
My probably just as cheap, Spinner Fork on my Koga WTR has accordion boots from
above the slider, to the fork crown.
Last edited by fietsbob; 03-05-13 at 03:29 PM.
#19
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This will be in one leg of the fork. The dampener with the oil will be in the other leg. This is the common construction of a fork now. The spring...air, coil, elastomers, etc...are in one leg and any dampening or height adjustment is in the other leg. Very inexpensive forks will have nothing in the other leg.
This manual shows the procedure for service on page 25.
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Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
#20
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I'm not that familiar with the guts of a Rockshox Dart. I have, however, used coil/elastomer springs in many Manitou forks. In the old Manitou, they used a ureathane stack with a small coil spring at one end. From what I can tell from the parts I see for the Dart, the Dart uses a long spring with a couple of elastomers...commonly and incorrectly called 'rubber'...incorporated into the coils. The elastomers will act as dampeners to slow down the spring rate of the steel spring. Makes the spring less 'pogoiey'. You can see what the spring looks like here.
This will be in one leg of the fork. The dampener with the oil will be in the other leg. This is the common construction of a fork now. The spring...air, coil, elastomers, etc...are in one leg and any dampening or height adjustment is in the other leg. Very inexpensive forks will have nothing in the other leg.
This manual shows the procedure for service on page 25.
This will be in one leg of the fork. The dampener with the oil will be in the other leg. This is the common construction of a fork now. The spring...air, coil, elastomers, etc...are in one leg and any dampening or height adjustment is in the other leg. Very inexpensive forks will have nothing in the other leg.
This manual shows the procedure for service on page 25.
#21
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Rubber is a member of the class of compounds called elastomers. It's a broad category of which rubber is a single example. Basically any polymer (plastic) that stretches and springs back is an elastomer. The rubber of your tires...which is 'real' rubber...is an elastomer. As is the rubber of your tube. The Lycra of your bike shorts (if you use them) is an elastomer. The ureathane in the springs is an elastomer. Grips and tape are elastomers as well. The ureathane of your saddle padding is an elastomer...unless you don't need no stinking padding and ride a Brooks
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Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
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Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
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Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
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It seems really disappointing that the original fork is falling apart so quickly.
You might be able to find a decent used fork, from someone who has decided to upgrade his mountain bike to the latest long-travel fork. I'm not sure how active the used bike part market is in Frankfurt, where I live I'm sure I could find such a used fork before I could get around to stripping the peeling plating and rust off the existing fork.
I guess I'm saying, I'd rather swap in a decent used fork, than spend time scraping away at the crappy original fork.
When you do, consider installing fork boots - the accordion rubber tubes that cover and protect the chrome stanchions. I have those on my MTB's forks, which are over 20 years old, and still look and work great.
You might be able to find a decent used fork, from someone who has decided to upgrade his mountain bike to the latest long-travel fork. I'm not sure how active the used bike part market is in Frankfurt, where I live I'm sure I could find such a used fork before I could get around to stripping the peeling plating and rust off the existing fork.
I guess I'm saying, I'd rather swap in a decent used fork, than spend time scraping away at the crappy original fork.
When you do, consider installing fork boots - the accordion rubber tubes that cover and protect the chrome stanchions. I have those on my MTB's forks, which are over 20 years old, and still look and work great.
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Fork boots will keep the forks looking new for a long time, that is if you peel them back to look inside.
#25
Banned
Lizzard skins sewed a velcro closed Neoprene wetsuit foam piece for other forks ,
you wrap it around the exposed metal on top.
I think the cast slider has a groove around it to retain the bottom end of the accordion boot,
and they quit doing that a while ago. My 04 Koga WTR , they have the boots,
a short (4cm) travel Spinner fork , machined with more threaded holes,
but as a Big Batch Order for a Manufacturer of thousands of bikes ,
a lot can be done for those OEM customers.
you wrap it around the exposed metal on top.
I think the cast slider has a groove around it to retain the bottom end of the accordion boot,
and they quit doing that a while ago. My 04 Koga WTR , they have the boots,
a short (4cm) travel Spinner fork , machined with more threaded holes,
but as a Big Batch Order for a Manufacturer of thousands of bikes ,
a lot can be done for those OEM customers.
Last edited by fietsbob; 03-05-13 at 05:42 PM.