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#11
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durability of Mavic MA3s?
Jay S. Hill wrote: I've just found that a Mavic MA3 rim on one of my bikes has had a spoke tear the rim. I've done a bit of Googling and it looks like the MA3s of my vintage (about three years old) might not have been the most reliable. Very common on MA-3s. We stopped building with them after about the 10th one did this very thing. What should I use to replace the failed MA3? The wheel is used on a cyclocross bike that sees rugged use. It's my heaviest road bike; it sometimes gets ridden fairly hard over broken asphalt and dirt roads, and has heavy Continental Travel Contact 37mm tires on it. CXp-33, Velocity Fusion or Deep V. Are newer MA3s more reliable? Are there other more reliable rims that would allow me to reuse the same spokes (ie, that have the same dimensions)? 608mm ERD...'fool me once, shame on me', I believed Mavic on MA-3s, got the 'really, haven't heard of that', type BS from mavic after the 3rd or 4th one. I Would not use them now under any circumstances. |
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#12
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durability of Mavic MA3s?
jim beam wrote: Jay S. Hill wrote: I've just found that a Mavic MA3 rim on one of my bikes has had a spoke tear the rim. I've done a bit of Googling and it looks like the MA3s of my vintage (about three years old) might not have been the most reliable. What should I use to replace the failed MA3? The wheel is used on a cyclocross bike that sees rugged use. It's my heaviest road bike; it sometimes gets ridden fairly hard over broken asphalt and dirt roads, and has heavy Continental Travel Contact 37mm tires on it. Are newer MA3s more reliable? Are there other more reliable rims that would allow me to reuse the same spokes (ie, that have the same dimensions)? what is your spoke tension? these rims need to be built with the aid of a tensiometer. excess tension will cause cracking just as you describe. All three of the wheelbuilders here use the DT dial tensionometer and all were very precise in the tension..we still have about a dozen fail like was desribed. It was a poor design, not the tension. no known differences on ma3's over time. if you want a change, there are plenty of other rims out there, but not many with the same effective rim diameter [erd] so a change of rim probably means re-spoking. if you want something more abuse tolerant, one of the mavic touring rims like the a719 are very robust but have different erd's and probably drilling count too. |
#13
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durability of Mavic MA3s?
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#14
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durability of Mavic MA3s?
BrewsterFong wrote: "JeffWills" wrote in message ups.com... wrote: What do you think of http://tinyurl.com/cjwd6 That looks great. Now all I need to do is get some of these from my LBS. Jobst Brandt If you manage that, Jobst, could you share your secret? As far as I can determine, Ambrosio rims are only available in the U.S. under the Torelli brand name, and Torelli says those particular rims are no longer being made. I'd love to get my hands on a couple sets of rims like the old MA-2. A couple of online places that sells Ambrosio rims are www.ital-tecno.com http://www.ridecampy.com/26/cat26.htm?77 And it appears neither place lists the Ambrosio Nexus rim that was referenced above. Bzzzzzt! Jeff |
#15
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durability of Mavic MA3s?
"JeffWills" wrote in
oups.com: If you manage that, Jobst, could you share your secret? As far as I can determine, Ambrosio rims are only available in the U.S. under the Torelli brand name, and Torelli says those particular rims are no longer being made. I'd love to get my hands on a couple sets of rims like the old MA-2. A couple of online places that sells Ambrosio rims are www.ital-tecno.com http://www.ridecampy.com/26/cat26.htm?77 And it appears neither place lists the Ambrosio Nexus rim that was referenced above. Bzzzzzt! Jeff Well, here's a place with some 32h Torelli Masters left: http://www.spokeandsprocket.com/cartgenie/prod-95.htm I'm actually in the process of getting a set of wheels built with 36h Torelli Masters (with Veloce hubs), and the LBS guy (Aaron Goss at Aaron's Bicycle Repair) building them told me the following: 1) that not only are they similar to the MA2s, they're actually extruded from the old MA2 dies, in France. The straight stock is shipped to Italy, where Ambrosio rolls them. 2)when his stock of Torellis runs out, he plans on switching to the Ambrosio Nexus, so apparently, he's confident he can get them. I dunno, his website is http://www.rideyourbike.com - He doesn't do built wheels via mail order, but does do some mail order of parts. Maybe he can get you the rims, or maybe he can point you to his distributor. -Hank |
#16
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durability of Mavic MA3s?
Hank Wirtz wrote: Well, here's a place with some 32h Torelli Masters left: http://www.spokeandsprocket.com/cartgenie/prod-95.htm I'm actually in the process of getting a set of wheels built with 36h Torelli Masters (with Veloce hubs), and the LBS guy (Aaron Goss at Aaron's Bicycle Repair) building them told me the following: 1) that not only are they similar to the MA2s, they're actually extruded from the old MA2 dies, in France. The straight stock is shipped to Italy, where Ambrosio rolls them. Could someone who remembers the exact dimensions of the MA2 check if these are consistent with the Nexus/Torelli Master? If the are the same, what happened that there was a Torelli Master "tight fit" problem which was described in a recent thread here? That would mean a goof at Ambrosio in cutting the stock to the right length. Does your builder know if this was corrected? s |
#17
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durability of Mavic MA3s?
George King writes:
Well, here's a place with some 32h Torelli Masters left: http://www.spokeandsprocket.com/cartgenie/prod-95.htm I'm actually in the process of getting a set of wheels built with 36h Torelli Masters (with Veloce hubs), and the LBS guy (Aaron Goss at Aaron's Bicycle Repair) building them told me the following: 1) that not only are they similar to the MA2s, they're actually extruded from the old MA2 dies, in France. The straight stock is shipped to Italy, where Ambrosio rolls them. Could someone who remembers the exact dimensions of the MA2 check if these are consistent with the Nexus/Torelli Master? I have a few cross section slices of MA-2's in front of me and they look identical in shape and dimensions given. If the are the same, what happened that there was a Torelli Master "tight fit" problem which was described in a recent thread here? That would mean a goof at Ambrosio in cutting the stock to the right length. Does your builder know if this was corrected? I would rather measure the OD first before further conjecture. Jobst Brandt |
#18
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durability of Mavic MA3s?
"41" wrote in message oups.com... If the are the same, what happened that there was a Torelli Master "tight fit" problem which was described in a recent thread here? That would mean a goof at Ambrosio in cutting the stock to the right length. Does your builder know if this was corrected? It wasn't mentioned one way or another. He won't sell Mavics because of the eyelet problems though, and seems like a fastidious enough guy that something like that would not be allowed to slide. In SpoCalc, though, it mentions 2 different ERDs for Torelli Masters. Before & After, maybe? -HW |
#19
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durability of Mavic MA3s?
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#20
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durability of Mavic MA3s?
On Mon, 08 Aug 2005 12:50:50 -0400, Alex Rodriguez
wrote: In article , says... but jobst, according to competent professional wheel builders on this group, many non-eyelet rims successfully resist cracking, and of the mavic rims, the x517 & now x717 series [including disk-specific rims] use only single eyelet with no apparent disadvantage. the only "design weakness" of the ma3 is that it cannot tolerate "tension as high as the rim will bear", but that's not a mavic problem. a quick call to 888-gomavic will reveal the manufacturer spoke tension spec and the recommended application. Why would mavic not include that information with every rim? [snip] Dear Alex, My theory is that Mavic employs some of the stupidest-- Certain corporations make a fetish of secrecy and inconvenience because they're nitwits who-- Er, the recommended tension for Mavic rims is a proprietary secret, meant for dealers, not ordinary users. For their convenience, tension specs are available through these eight easy steps: Go he http://www.tech-mavic.com/ Click on English. Log on as mavic-com, using the secret password dealer. Click on products. Click on a category like road and triathlon. Click on a rim model. Click on spare parts and references. Wait for the pdf to load. Look down on the lower right for the tension. Or you can try Jim's more primitive method of calling 888-gomavic and asking for the same secret information. The point is that you, as a mere customer, are not supposed to think that the company gives out this kind of info to just anybody. Heaven forbid that there should be an easily available web site that answers the obvious questions! Carl Fogel |
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