I have sturmey archer xfdd and xrd5. Which brake lever are suitable for these and drop handle bars. The cable is road type with a barrel rather than a nipple.
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I can not find anything suggesting that these components require special parts, so it looks like any road bike brake lever should work well.
If you are replacing the shifter as well, then you should be sure to buy and indexed 5 speed shifter. It will be difficult to find a 5 speed brake lever / shifter combo, as most road bikes have many more gears.
You will probably want to try to use these with V-Brake compatible drop bar levers (long pull) as opposed to standard drop bar levers used with caliper or canti brakes (short pull). One product that comes to mind is a Tektro RL520.
I don't think it's advisable to use with an integrated brake/shifter setup (Shimano STI / SRAM Doubletap Shifters / Campagnolo Ergo Shifters). You may want to consider using bar end or downtube shifters, if you're not using an Internally Geared Hub.
Any drop bar lever that isn't designed for V-brakes (which is almost all of them).
Brakes levers come in two different mechanical advantages: http://en.wikipedia.org/wiki/Bicycle_brake#Brake_levers
The Sturmey Archer straight bar brake levers are short pull, so you want a short (standard) pull drop bar lever.