Freehub or Freewheel on a Trek 2.1c?
 

I've been looking into which tools I need to take with me on longer rides, and obviously one of the issues could be spoke breakage. However, if it's on the drive side, I'll need to remove the cassette. This is probably just me being stupid, but would a decent, new road bike (mine is Trek 2.1 c 2011) with Bontrager wheels have a freewheel or freehub? I have researched it but ended up more confused than when I started, I assumed freehub but then the online spec seems to suggest freewheel! I gather that I need a chain whip if it has a freehub :(. Thanks in advance for help!

They use a freehub. You could carry along one of these: http://www.adventurecycling.org/stor...sette-lock.cfm

I'm not sure what your exact model is but if you have 8 or more gears on your rear cluster than you have a freehub. to remove the gear casette you will need a chainwhip and a cassette tool (Park Tool FR-5 for a Shimano or SRAM cassette) and a 1" wrench.

Yes, you definitely have a cassette freehub. You'll need a chainwhip, cassette tool, and the wrench to turn it with to remove the cassette.

But my advice regarding spoke breakage is that if you're that worried about it, just ditch the stock wheels and get some that you know will never break a spoke! Hand built 32x3 or 36x3 wheels will hold up to just about anything depending on your weight, as long as you don't purposely abuse them. I've never had to repair a spoke on the road, but it would not be a fun operation. Assuming it was on the driveside rear wheel, you'd need to remove the cassette then remove the tire, tube, rim strip, then replace the spoke and tension it and get your wheel true again.

I know some of those low-spoke Bontragers have problems with reliability, but maybe they have gotten better recently.