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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 03-03-06, 11:55 PM   #1
MacG
don't pedal backwards...
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moustache bars

There was a box on the doorstep when I got home from work today, which resulted in me spending about four hours in the basement tinkering with bike stuff this evening.

First order of business: install new cranks (Sugino RDs) and new bottom bracket. Involved lots of fighting with said bottom bracket since I stupidly bought a Shimano (ISO tapers) to go with my RDs (that other taper standard). Net result is that my BB spindle is effectively wider than it should be due to the taper mismatch. Fortunately, I had bought a wide BB and a spacer since my BB shell is a weird oddball width for some reason. Omitting the spacer and moving the chainring to the inner spacing gives me a very reasonable chainline for the time being. New 17t cog was installed to reobtain desired gearing with the new 48t ring and the chain was lengthened slightly to match.

Second order of business and the meat of this thread: ditch those annoying drop bars! I don't know how people can stand drop bars. I'm not incredibly flexible, but I doubt increased flexibility helps your lungs inflate fully when hunched over on drops. The gender-specific plumbing accessories were another issue not helped by the drops. Since I always rode them on the tops, I had about 1.5 hand positions that were comfortable to work with. The 'stache bars should increase that to at least 4 positions: outer, front, angle (palms up), and inner.


(click for some more pictures)


I stupidly ordered the 26.0 bars instead of the 25.4 and realized that I don't own any 26.0 stems after it was far too late. Ghettogineering to the rescue! I chucked a scrap of 1/2" copper pipe in the drill press and taped a flap of sandpaper to it. It took me a long time, but I successfully enlarged the stem to fit the bars perfectly with my homebrewed and only somewhat effective spindle sander.

I salvaged the bar tape from the drops as well as the brake lever. The brake cable is insanely short now and actually looks pretty tidy compared to the drop setup where it looped up over the bars. Not wanting to have my computer in the way of the potential innermost hand position, I made excellent use of the suicide lever stub by making an accessory mount that bolted to the brake lever out of a scrap of 3/4" copper pipe. Much trial and error got the shape, bend angle, and hole alignment right, and then I sanded it down nicely and wrapped it with some leftover cotton bar tape for looks. End resut: computer is mounted even further forward than usual (easier to read when leaned down over the bars) and takes up no handlebar real estate whatsoever.



Anyone else running moustache bars? I haven't even test ridden the setup yet since I'm dog tired, but just from sitting on it in the hallway and riding across the house I like it a lot already.
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Old 03-04-06, 12:10 AM   #2
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generally not a fan of mustache bars (and a big fan of drop bars)but your setup is making me one.
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Old 03-04-06, 12:19 AM   #3
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Dig it!
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Old 03-04-06, 12:25 AM   #4
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moustache
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File Type: jpg Barley & support.JPG (64.3 KB, 58 views)
File Type: jpg Moustache.JPG (50.4 KB, 55 views)
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Old 03-04-06, 12:29 AM   #5
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Quote:
Originally Posted by MacG
First order of business: install new cranks (Sugino RDs) and new bottom bracket. Involved lots of fighting with said bottom bracket since I stupidly bought a Shimano (ISO tapers) to go with my RDs (that other taper standard). Net result is that my BB spindle is effectively wider than it should be due to the taper mismatch. Fortunately, I had bought a wide BB and a spacer since my BB shell is a weird oddball width for some reason. Omitting the spacer and moving the chainring to the inner spacing gives me a very reasonable chainline for the time being. New 17t cog was installed to reobtain desired gearing with the new 48t ring and the chain was lengthened slightly to match.
I think i have to try moustache bars sometime.
Anyway. Shimano BBs are JIS tapered, not ISO. and your sugino cranks take a JIS taper as well.
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Old 03-04-06, 12:42 AM   #6
MacG
don't pedal backwards...
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Quote:
Originally Posted by baxtefer
I think i have to try moustache bars sometime.
Anyway. Shimano BBs are JIS tapered, not ISO. and your sugino cranks take a JIS taper as well.
Hmm... Then something is really off about either my research or my bike. A 107mm bottom bracket is supposed to give a chainline that matches that of my Formula hub, but the crank was 1/2 to 3/4 inch further away from the centerline of the bike than the cog until I took the spacer out and moved the ring inboard. I'll have to do some measuring and more research tomorrow and find where I went wrong.
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Old 03-04-06, 12:52 AM   #7
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something is seriously wrong if there was a 2 cm difference in chainline.
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Old 03-04-06, 01:11 AM   #8
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Well, maybe it wasn't as bad as 2cm. I can't remember exactly how much it looked like now. I do know that I thought I had done my homework and planned things out so I would get a nearly perfect chainline with the new BB and cranks, and when I torqued the drive side crank onto the spindle and held a ruler up against the chainring, it was far from nearly perfect. The combination of moving the ring from the outer position to the inner and removing the 2mm BB spacer got the chain really close to straight, but is not what I wanted to have to do.

I thought the cranks seemed to not be on the tapers very far, too. I'm used to the spindle coming up pretty close to flush with the inner face of the crank. There was a lot more space with this combination than I am used to.

I have measured the position of the cog in the dropouts and gotten a 44mm chainline, just like Formula says you should. Tomorrow I'll find my caliper and measure the shell, the spindle length, and the chainlines I can get with the new cranks and BB.

Last edited by MacG; 03-04-06 at 01:17 AM.
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Old 03-04-06, 01:20 AM   #9
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why did you think you needed the 2mm spacer?
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Old 03-04-06, 01:31 AM   #10
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My BB shell is about 70.5mm wide, so using a 68 or a 73 BB would theoretically screw up my carefully planned chainline.

I know that 70mm is the shell width for Italian bottom brackets, but this is a 1980 or so Raleigh Grand Prix frame that appeared to still have the original BB and crankset in place when I got my hands on it. I figured I either had some weirdo BB, or the shell had been faced in at some point in time. Neither of which made much sense.

I found while installing the non-drive side cup for the new Shimano BB that the threading on that side and that side only is not standard. It is really close, as I could thread the cup in about halfway before the threads started to bind up, but when I held the old adjustable cup alongside the new cup, the thread pitch did not match.

I probably should have taken the BB back to the bike shop to see if there was a proper part I could use, but I wanted to get this bike rideable ASAP, so I drememed off half of the offending threads on the cup, allowing me to thread it in with only slight binding and still leave enough threading to adequately support the BB cartridge. Now that I see how off the chainline is, maybe I should have left the BB cup in a condition that had half a chance of being accepted for an exchange... Oh well.
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Old 03-04-06, 01:36 AM   #11
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read this
http://www.sheldonbrown.com/raleigh26.html
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Old 03-04-06, 01:55 AM   #12
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argh! Those **** english...

Thanks for the link; that explains a lot! Looks like I'll run into the thread pitch problems if I try to swap in a modern headset as well.
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Old 03-04-06, 02:19 AM   #13
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I rilllly don't like moose-tache barz, but I can understand how one could. so bully for you, but please excuse me for cutting myself after the viewing.
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Old 03-04-06, 08:59 AM   #14
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nice dude. very nice. i'm not sure about the computer mount but it's clever no doubt. the 'stache bars look totally dap. i'm puttin' some on my new ride. lookin' at yours makes me feel i mad the right decision. i too don't like drops at all. bullhorns or 'stache bars all da way! nice.
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