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Used Mtn Bike
I just seen a older Mtn bike (no noticable brand name) at a local 2nd
store. The bike is in relatively good shape, tires have no cracks (rear rim needs trueing), hold air, the gears, brakes work, but need some minor adjusting. Another point is the bike is extremely light (no suspension at all!!) for a mtn bike All in all it is not too bad, I figure with an hour or so of work, the bike can tuned up and ready to be rode. The bike is equipped with Shimanno Deore shifters and derailleurs, what is the quality on this components. I am not too worried about them as I can replace if needed. If I decide to replace these components, what would be a suitable replacement considering cost vs performance and reliability without breaking the pocketbook. Thanks, Mark |
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#2
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On Tue, 12 Oct 2004 19:31:57 GMT, Mark wrote:
I just seen a older Mtn bike (no noticable brand name) at a local 2nd store. The bike is in relatively good shape, tires have no cracks (rear rim needs trueing), hold air, the gears, brakes work, but need some minor adjusting. Another point is the bike is extremely light (no suspension at all!!) for a mtn bike All in all it is not too bad, I figure with an hour or so of work, the bike can tuned up and ready to be rode. The bike is equipped with Shimanno Deore shifters and derailleurs, what is the quality on this components. I am not too worried about them as I can replace if needed. If I decide to replace these components, what would be a suitable replacement considering cost vs performance and reliability without breaking the pocketbook. Thanks, Mark Deore is mid-level, which is pretty good since even Shimano's low-level is pretty good. When buying replacement parts, Deore is a nice choice for that cost/peerformance level. Anything 'higher' in Shimano's hierarchy is primarily less weight; improvements in function are minor for the extra money. Lower levels will also work fine, and sometimes a 'lower' part has desirable qualities that Shimano has dropped from 'higher' parts. Starting at the top, Shimano's hierarchy of MTB parts- http://bike.shimano.com/mtb/index.asp If it ain't broke, don't fix it, is a good policy with a large hunk of Shimano's parts. |
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Dan Daniel wrote:
On Tue, 12 Oct 2004 19:31:57 GMT, Mark wrote: Deore is mid-level, which is pretty good since even Shimano's low-level is pretty good. When buying replacement parts, Deore is a nice choice for that cost/peerformance level. Anything 'higher' in Shimano's hierarchy is primarily less weight; improvements in function are minor for the extra money. Lower levels will also work fine, and sometimes a 'lower' part has desirable qualities that Shimano has dropped from 'higher' parts. Starting at the top, Shimano's hierarchy of MTB parts- http://bike.shimano.com/mtb/index.asp If it ain't broke, don't fix it, is a good policy with a large hunk of Shimano's parts. One thing I forgot to mention in my original post. The back brake is mounted down at the bottom bracket. I have not seen this type of setup before. My concerns would be keeping the brake components free of debris, water etc. Also there are no mounting points on the rear top stay to move the brakes to even if I wanted to. Anyone have any comments on these bottom mounted brake setups. Thanks Mark |
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Wed, 13 Oct 2004 00:46:27 GMT, DV_ad.728789$gE.717782@pd7tw3no, Mark
wrote: One thing I forgot to mention in my original post. The back brake is mounted down at the bottom bracket. I have not seen this type of setup before. My concerns would be keeping the brake components free of debris, water etc. Also there are no mounting points on the rear top stay to move the brakes to even if I wanted to. It sounds like a U-Brake. Sheldon Brown says: "A form of cantilever brake that works like a centerpull caliper. The "L"-shaped arms cross over above the tire, so the left brake shoe is operated by the right side of the transverse cable. A U-brake uses studs that are above the rim, rather than below the it, as with conventional cantilevers. They use the same type and placement of studs as rollercam brakes do. In 1986-88 there was a fad for equipping mountain bikes with U-brakes mounted underneath the chain stays. This provided a nice clean look to the seat stay area of the bicycle, and provided a somewhat simpler cable routing. In addition, since the chain stays are larger and more rigid than typical seat stays, the "problem" of flexing of the studs under load was reduced. Conventional cantileves cannot be mounted on the chainstays, because the cantilevers would get in the way of the cranks. Although U-brakes were cool looking and powerful, the fad died quite abruptly when people actually started using the bikes that were sold with chainstay- mounted U-brakes. They had several serious drawbacks: The inaccessible location made it very difficult to service or adjust the brakes. They complicated the process of wheel removal. They tended to get clogged with mud. Due to the high-mounted studs, if you didn't monitor the brake shoe wear carefully, as they would wear, they would hit higher and higher on the rim. Eventually, they would overshoot the rim and start rubbing on the tire sidewall. This is one of the fastest known ways to destroy a tire. In recent years U-brakes have been making a bit of a comeback on freestyle bikes." -- zk |
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Zoot Katz wrote:
Wed, 13 Oct 2004 00:46:27 GMT, DV_ad.728789$gE.717782@pd7tw3no, Mark wrote: One thing I forgot to mention in my original post. The back brake is mounted down at the bottom bracket. I have not seen this type of setup before. My concerns would be keeping the brake components free of debris, water etc. Also there are no mounting points on the rear top stay to move the brakes to even if I wanted to. It sounds like a U-Brake. Sheldon Brown says: Thanks for the info, it is appreciated. Mark |
#6
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"Mark" wrote in message newsV_ad.728789$gE.717782@pd7tw3no... One thing I forgot to mention in my original post. The back brake is mounted down at the bottom bracket. I have not seen this type of setup before. The bike is from the 80s. Still might be a fun bike. The U-brakes worked fine, even if they were in a silly location. I'll guess the bike has a 6-speed rear end. Freewheel instead of cassette? Cassettes are much better, but freewheels were OK too. BTW, my Deore equipped 80s fully rigid bike weighed about as much as the full-suspension bike I bought many years later (80s bike lasted longer though), and more than either of the front-suspension equipped hardtails I've had. |
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