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Show us your vintage mountain bikes!

Old 08-13-19, 09:40 PM
  #6551  
amillhench
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@bwilli88 they are Vans Cult waffle grips. 👍🏻
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Old 08-13-19, 10:48 PM
  #6552  
thook
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Originally Posted by Korina View Post
I love mtb gearing, as Humboldt Bay is a thin strip of flat surrounded by crazy steep hills. Not sure about the stx; the big ring has a broken tooth, so probably it'll go to the bike library.
mtb gearing.....me, too! ozarks here! this 165mm is a triple road (mid 80's SR) with 110bcd outer/middle and 74bcd granny. so, mtb gears can be installed, but the tread profile (i think that's how it's termed) is narrow. would hit mtb chainstays trying to pedal

that stx looks like the rings are replaceable. someone should get some use out of it
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Old 08-14-19, 07:02 AM
  #6553  
DorkDisk
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Originally Posted by Korina View Post
I love mtb gearing, as Humboldt Bay is a thin strip of flat surrounded by crazy steep hills. Not sure about the stx; the big ring has a broken tooth, so probably it'll go to the bike library.
Shimano chainrings have varying profiles designed to assist shifting which are often mistaken for broken teeth.

Originally Posted by thook View Post
mtb gearing.....me, too! ozarks here! this 165mm is a triple road (mid 80's SR) with 110bcd outer/middle and 74bcd granny. so, mtb gears can be installed, but the tread profile (i think that's how it's termed) is narrow. would hit mtb chainstays trying to pedal

that stx looks like the rings are replaceable. someone should get some use out of it
STX cranksets are odd, early ones had a wierd (95?) BCD with an odd middle ring setup, while later ones had a more normal 94 BCD
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Old 08-14-19, 09:02 AM
  #6554  
Korina
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Originally Posted by thook View Post
mtb gearing.....me, too! ozarks here! this 165mm is a triple road (mid 80's SR) with 110bcd outer/middle and 74bcd granny. so, mtb gears can be installed, but the tread profile (i think that's how it's termed) is narrow. would hit mtb chainstays trying to pedal

that stx looks like the rings are replaceable. someone should get some use out of it
Bcd? I should know this, but I'm drawing a blank.

Here's a fascinating discussion about crank lengths.

Edit: bolt circle diameter? I know it's not binary coded decimal.
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Old 08-14-19, 12:57 PM
  #6555  
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yeah, bolt circle diameter. the crank's bolt pattern for mounting sprockets! it's important to know for when it comes time to replace your sprockets. it's usually printed or stamped on the sprocket somewhere.
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