Join Date: May 2010
Location: Madison, Wisconsin
Mentioned: 2 Post(s)
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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.