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#1
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Shimano chains - rivet reuse?
The other day the mechanic at my local bike shop rejoined my Shimano 10
speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. The mechanic is very experienced, very well respected and services many bikes in a busy shop. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin -- Removed z before replying by email. |
#2
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Shimano chains - rivet reuse?
Martin wrote:
The other day the mechanic at my local bike shop rejoined my Shimano 10 speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. The mechanic is very experienced, very well respected and services many bikes in a busy shop. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin I would never ride with a chain rejoined with reused rivets. Even with 8 speed Shimano chains they say to rejoin them with a special pin. 10 speed chains have even thinner outer plates. Lou -- Posted by news://news.nb.nu |
#3
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Shimano chains - rivet reuse?
Martin:
It used to be that you could use the existing rivet to close a chain. In fact, it would be very difficult to replace a rivet since you could not thread it through the whole. so, you would break the chain without completely removing the rivet. That is how chains would work, until shimano came up with the replaceable rivet. It was the stupidest idea ever. Whenever you break a shimano chain, you must replace the rivet with a special order shimano rivet. Otherwise, the chain will surely fail. With SRAM chains, you can reuse existing rivets, or use the special link that allows you to break the chain with no tools. Andres |
#4
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Shimano chains - rivet reuse?
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#6
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Shimano chains - rivet reuse?
On Sun, 21 Aug 2005 08:46:29 GMT, Martin wrote:
The other day the mechanic at my local bike shop rejoined my Shimano 10 speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. I guess I'm slow - why would he need to use two rivets to rejoin a chain? If he opened the chain for service, that's one rivet - OTOH if he's repairing a broken chain that's also one rivet. Ron The mechanic is very experienced, very well respected and services many bikes in a busy shop. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin |
#7
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Shimano chains - rivet reuse?
RonSonic wrote:
On Sun, 21 Aug 2005 08:46:29 GMT, Martin wrote: The other day the mechanic at my local bike shop rejoined my Shimano 10 speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. I guess I'm slow - why would he need to use two rivets to rejoin a chain? If he opened the chain for service, that's one rivet - OTOH if he's repairing a broken chain that's also one rivet. The special pin that was originally used to join the chain had partially come out leaving the chain joined by one plate of the link. This plate was bent so the mechanic replaced one link and reused original rivets at both ends. The first symptom I noticed was the chain coming off the small ring (at low speed and moderate effort) on a hill. The mechanic said he sees that kind of failure quite often in the special pins (which are installed by the bike manufacturer, not by him). Martin Ron The mechanic is very experienced, very well respected and services many bikes in a busy shop. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin -- Removed z before replying by email. |
#8
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Shimano chains - rivet reuse?
Martin wrote: The other day the mechanic at my local bike shop rejoined my Shimano 10 speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. The mechanic is very experienced, very well respected and services many bikes in a busy shop. BUT he made a serious mistake. BAD idea for any shimano chain, REALLY bad idea for the 10s chain. He is asking for a broken chain, on a chain that is known for breaking even when connected properly. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin |
#9
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Shimano chains - rivet reuse?
He is asking for a broken chain, on a chain that is known for breaking even when connected properly. Really? I have 23,332 miles on my DA10 and have not had a broken chain. I do have it changed every 1,000-1,500 miles and that may help... |
#10
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Shimano chains - rivet reuse?
On Sun, 21 Aug 2005 20:48:41 GMT, Monty wrote:
He is asking for a broken chain, on a chain that is known for breaking even when connected properly. Really? I have 23,332 miles on my DA10 and have not had a broken chain. I do have it changed every 1,000-1,500 miles and that may help... I decided to save the pin when I replaced my DA10 chain. Left me by the side of the road within 200 mi. Been using the pin since and no problems between chain replacement. |
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