Singlespeed & Fixed Gear - 125 mm dropout spacing?
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03-08-08, 11:30 PM
Just picked up a Miyata Liberty from stl bikeworks, awesome recycled bike shop, and measured the gap between the dropouts. I got 125mm, maybe the frame is a little out of whack. Is it a better idea to go with a 120mm or a 130mm hub? I can't find any 125's as I'm pretty sure that's not what it's supposed to be to begin with. Also, should I spread (or compress) the rear triangles to get to 120 or 130, or can I just slip the hub in and not worry about it.
03-08-08, 11:37 PM
I'd go 120, but thats just me. I would rather compress then spread. No real reason why other then I am more used to compressing.
there's such thing as 126mm
iro, for one has em for an option
03-08-08, 11:39 PM
Hmmm. After i saw this frame http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=150222155875&ssPageName=STRK:MEWA:IT&ih=005 on ebay I was wondering the same question. It has 125mm rear, too.
03-08-08, 11:54 PM
Maybe the 126 was meant to become the new standard and it fizzled out. I don't know. I really don't want to have to hunt for 126 hubs though. Trying to keep the whole build under 200$ ($80 on the complete and $10 donation to the earn-a-bike program at the shop), so I'm looking to go with something like the Dimension flipflop or one of the Harris Cyclery specials. Not sure if I'm going to build up a whole new wheel, or keep the rim and swap out the spokes and hub. So as long as it's okay to compress, I'm going to. Probably just use the bold tension to compress, instead of a 2x4. It is a steel frame (1020 or something along those lines) so I'm not terribly worried.
03-08-08, 11:59 PM
a 120 mm hub would work just fine.
a lotta the conversions you see on here have 126 mm spacing and 120 mm spaced track hubs work perfectly.
Build your own
03-09-08, 01:55 AM
You can use a 120 as is or you can add spacers to get to 126.
03-09-08, 01:58 AM
Just get some washers and respace (http://www.sheldonbrown.com/frame-spacing.html) the 120. The only difference between 120mm hubs and 130mm hubs (generally) is how long the axle is.
03-09-08, 03:10 AM
Maybe the 126 was meant to become the new standard and it fizzled out. I don't know.
126mm spacing is for 6/7sp road hubs, pretty common for a mid to late 80s frame.
As far as what size to use, I would just use whatever is easiest to get a hold of or will be the most convenient. With 120 or 130, you are only going to have to compress/spread the stays 2.5mm on each side. Not a problem.
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