Bicycle Mechanics - Handlebar change
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02-01-07, 09:41 AM
Hi all - please lend me your expertise!
I have an MTB and have recently changed the flat bar to a Profile Airwing Aero Handlebar.
The problem is that the standard V-brake and gear levers won't fit into the new bar as it is a bit thicker.
What are my options?
Bar-end integrated brake/gear levers perhaps?
Or something else?
MANY THANKS FOR ALL THE HELP
02-01-07, 09:53 AM
This bar is designes for road bikes and is a 26.0mm bar. It is probably unsuitable for your present stem clamp as well as your shifter/brake levers of choice.
You would seem to have 2 choices, road bike running gear or
Go back to the drawing board and try to find a mountain bike bar of similar design.
02-01-07, 10:04 AM
This is not going to be cheap. Assuming these are drop bars you installed, either go with STI's with travel agents and a new road front derailleur, or go with bar end shifters and 287-V brake levers. I'm sure there are other options.
02-01-07, 10:22 AM
The bar is actually 23.8 and I had no problems fitting it into my stem clamp.
02-01-07, 10:23 AM
Actually it is not a drop bar. It's like a basic tri-bar. Thanks for the suggestion.
02-01-07, 11:16 AM
I'm confused, the profile airwing that I looked up was clearly a road bar, the base bar part of a tri bike setup. Unless it has a special dimension and stem of its own it is indeed designed to fit a road stem of 26mm dimension as opposed to a mountain bar of 25.4mm. On which part of the bar did you measure 23.8?
02-01-07, 01:54 PM
I did not actually measure it - I read it on a website. You must be right I guess...
02-01-07, 03:28 PM
If it is in fact 26.0 then the manufacturer's recomend against using a mountain stem. There have been pro's and con's about this in other posts but the gist of the argument is that the corners of the half round in the stem and the corners of the face plate will create stress risers in the bar because the clamping force will all be concentrated at the interface between those corners and the bar. An inexpensive road bar for your steering tube dia will fix that problem.
As to the brakes and shifters.....you can mount road bar end (time trial style) shifters on the ends of the bar and a conventional MTB brake lever on the flat top of the bar.
If you try to mount time trial brake levers out on the end of the bar you will have the wrong brake cable pull ratio and very weak brakes. Those levers are strictly for Road Brakes.
It is possible that there is an equivalent bar made to MTB specs. Try Nashbar or Ebay looking for a base bar with a 25.4mm measurement.
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