"Jim" wrote in message
oups.com...
What benefits do the Shimano Dura-Ace bar-end shifters offer, compared
with
modern integrated shifters? Is the 520 the only modern bicycle equipped
with
bar-end shifters?

There are still quite a few bar end shifter hold outs. Not that anything is
wrong with Ergo and the Shimano and soon to be SRAM equivilents, but bar end
shifters offer the following:

1. More choice in brake levers and shifters.
2. In a crash bar ends are protected and you are less likely to need to
replace them. Brake levers can be cheap to replace.
3. Actually if money isn't an issue, I think Campy 10 bar ends and their
carbon brake levers weigh less than Chorus Ergo. (Not a good reason to
choose bar ends.)
4. It can be good to lift your hands once in a while from the bar to shift.
You have to move your hands around anyway, so why not do it for a purpose
other than
to give them a break from a tiring placement.
5. Maybe bar ends are probably less likely to get gummed up with mud, and if
they are, or the indexing feature fails for some other reason you can use
them in friction mode.

There are other touring bikes and cross bikes with bar end shifters besides
the Trek 520. Cost can be a consideration when manufacturers spec bikes.
Don't think that for 'cross racing there are any advantages to bar ends, nor
for road racing. Tourists and others who like functional, simple equipment
are more likely to be bar end adherents.

One way to look at this is to ask, "Except for racing, is there a reason to
use integrated levers/shifters?"

Many points of view and it boils down to what you are comfortable with. I
run evrything from from Campy 10 Ergo to Suntour Barcons on my bikes. If I
had to live with only one technology, it would be bar ends.

Gary Jacobson
Rosendale, NY