I have some new insight into moustache bars - begun, ironically, last week just as this discussion was started. My results seem to be completely counter to most others', and to what I would have expected, so I thought I'd share them. Hopefully I can get some photos to upload, too:
I finally picked up my new All Rounder last week during a quick Spring Break trip with the family. I'd brought a bunch of parts along - including the moustache bars off of my XO-1 - so that I could re-build it to my taste. I then got a few good days of riding in... before having to return home to the land of snow where I now have to wait another month or so before I can ride again, damn it.
Anyway, despite the similarity in the bikes, some subtle differences in the moustache bar setup has made a HUGE and positive difference for me, and totally changed my opinion. Like many, I really "wanted" to love them on the XO-1, but could never get comfortable with them. I much preferred some 48cm noodles that they replaced, and will now be installing some dirt drop bars on that bike. But I LOVE the moustache bars on the ALL Rounder and now have a different setup theory!
Most surprisingly, I used a stem with much longer effective reach than I would have used with drop bars, or than I had used previously with the dirt drops (a true 10 mm vs. a dirt drop yielding approx 80mm horizontally, before reducing even further for a tall extension). I did this sort of as an experiment, and because it was the most appropriate stem I happened to have available - but I think I totally nailed it and don't have plans to change it
This admittedly isn't a complete apples-to-apples comparison, because the All Rounder is a 60cm and the XO-1 is a 55cm, and the top tube on the former is slightly more than an inch longer than the later. (I didn't know this until I got it.) But, if anything, you'd think that would mean that I'd want a SHORTER stem, and the opposite seems to be true. Similarly, my 60cm Rambouillet also has the same 100mm stem reach, with noodles. But it has a relatively short top tube - very close to the 55cm XO-1 - and I've honestly always felt like I'm a bit cramped on it. So... what I take from this is that the moustache bar works best with a stem as long or longer than I'd use with drop bars!
Now I only had time for several 3-4 hour rides but, unlike with the XO-1, was never uncomfortable. And keep in mind that these were my first rides of the season, other than snow biking, so I should have been uncomrortable anyway. I'm not sure I can explain why the long reach works better for me, but here is my best attempt:
- By using a stem with a long reach, my main hand position rotated outward/backward and became something like 9:30 and 2:30, on the curved portions of the bar, where I had access to the brake levers with just my first one or two fingers. Once I got the angle of the bar right, this fit my hands very comfortably. (For what its worth, I use gell pads under the tape, to increase the diameter of the bar, too.) I felt like this distributed my weight just right, relative to the front wheel and, more important, gave me a wider and more comfortable arm position. (I'd be curious to know if others have had this experience too but, on the XO-1 with the short stem, I used to regularly do endos simply mounting the bike or "kicking off," if my hands were all the way forward on the apex of the curve.)
- The sides of the bar, where it reaches back toward you, now became my second-most used position and, unlike with the short stem, my hands were still well in FRONT of the steering axis (head tube), so the steering was less twitchy and much more relaxing. I never liked this position previously. With the bar at or just slightly above my saddle height, this position is still about as "upright" as I care for.
- Then, when I gripped the far portion of the curve, or the brake hoods themselves (see photos), I was actually fairly stretched out, which was great for headwinds or hard pedaling - something I had missed with the previous setup, as others have noted. Yeah, it's not the same as a "deep" racer-style drop position but, as an old, converted mountain biker, that's not my thing anyway - that's why I like noodles and Rivendells to begin with.
- Finally, as you can see, I retained the small grips that I'd put in place of the original dummy/stoker lever option, to give me yet another hand position. I don't often ride here, but it's nice for long rides variety.
Hope this all makes sense. Like I said, I'm still trying to figure out why it worked for me - but I think I'm finally a believer.