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how to upgrade older 6-spd MTB

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how to upgrade older 6-spd MTB

Old 01-08-06, 10:38 PM
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meradi
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how to upgrade older 6-spd MTB

Hi,
I just reclaimed my trusty old Hardrock from my brother in law who hadn't used it that much but managed to break a few things. Anyway, The cranks, pedals, derailleurs, shifters, and back wheel are shot.

The first bunch of repairs I can handle, but as far as getting a new wheel -- would it be possible to go up to, say, 7 speeds in the back instead of 6? (It would make it easier to find parts, and I could get some rapidfires too). Any special tricks to it?

Not sure if the bike's really worth putting all this work into, but it has sentimental value to me, and it'll get some more years of use.

Thanks,
Brian
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Old 01-08-06, 11:40 PM
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Originally Posted by meradi
The cranks, pedals, derailleurs, shifters, and back wheel are shot.
The first bunch of repairs I can handle, but as far as getting a new wheel -- would it be possible to go up to, say, 7 speeds in the back instead of 6?
It's easy enough to replace all that, but is the frame worth it? If those are 6-speed grip shifters, you'll have to get 7-speed to be compatible with a 7-speed cassette.
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Old 01-08-06, 11:43 PM
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That may depend on the spacing of the frame, I think. You'll need a new rear wheel--according to your description--which will mean a new hub. You can get a decent replacement wheel for <$50 from you LBS with a cassette freehub. It'll probably be spaced at 135mm. Your frame may be spaced at 130mm. If so, since it is steel, you can coldset it. However, if your just going up from 130 to 135, you could just jam it in there. You will be able to put 7 speeds on most new hubs. In fact, you might even be able to do 8/9 depending on the hub. Enjoy the project.
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Old 01-14-06, 08:33 AM
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I measured the frame spacing - 135! I may go with an 8 or 9 speed then. I realize the frame itself might not be worth the upgrade, but if I can upgrade with 9-speed stuff, I can always use those parts on a later frame in the future and not lose the investment.
Now just figuring out what wheels to get. Something strong but not as heavy as the Schwinn wheel my brother-in-law substituted on the bike...

Hopefully I can go with SRAM. I've been meaning to try out a bike with their stuff. But cheap is good.

I had almost decided to just junk the bike, but I went to the LBS who was selling a similar-aged same model (not upgraded) for $160. Too much! Anyway I'll learn a lot as I go along and hopefully by spring it'll be done.

Any suggestions on wheels ? I considered weinmann 519's, but I read that they're not that strong and I'd rather avoid any problems right away.
Thanks!
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Old 01-14-06, 12:58 PM
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You do not need to spend lots of money to the king of bicycle you intend to rebuild. I would suggest 32 spokes wheels with Alexrims.
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Old 01-14-06, 03:58 PM
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I'm doing the same thing with an old Parkpre MTB right now. I coldset the frame, bought a new freehub 8/9 compatible rear wheel, deore front and rear deraileurs, and deore 9 sp trigger shifters. I'm in the process of installing the shifters now. Then I just need to throw on my new chain and adjust everything. Is the bike worth all the money and work I'm putting into it? Who knows? But to me it's fun, and as mentioned I can always upgrade the frame later (I got it for next to nothing) I figure when I'm done I'll have a pretty good bike for a few hundred bucks worth of parts, plus the experience of doing it my self!
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Old 01-14-06, 04:23 PM
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I just made this move on my 84 Ross.. picked up:
$75 for a new wheelset, including tires and tubes.. from e-bay
$30 for a set of low end V-brake lever / rapid fire shifters(8spd) from E-bay
$7 for a new cartridge BB from E-bay
$20 for new 12x21 8spd cassette from LBS
$15 for new chain from LBS
Now I have 8spd instead of 6.. I had no interest in going 9, this is a winter beater and I could get 8spd stuff cheaper plus it works better in mud and snow anyway...
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Old 01-15-06, 01:37 AM
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I've rescued quite a few old bikes. Personally the old steel Hardrocks rank as on of my favorites. I would say if you like the frame and it fits you then go for it. Also if you need help you can ask us. I really enjoy riding a bike that I have built myself to my own specs. No store bought bike ever seems to compare,but that might just be the feeling of pride that comes with it. If you choose to paint or even restore it you have several options also. I drool over an old Rockhopper the lbs has hanging on display everytime I go in there.
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