I want to build up a cross bike for commuting and possibly eventually racing.
Here's what I want to do:
Get a Redline Conquest Pro frame
Build it up with an Ultegra triple road group that I have
Buy some Avid shorty 6 brakes
Buy some cyclocross tires for my old set of Shimano R535 wheels
Ride said creation until it breaks
Is it ridiculous to build a cyclocross bike with a road triple group?
Is there any real advantage to spending the extra cash to get a double crank, the required deraileurs, and bottom bracket?
I don't race cyclocross, but have a Surly Crosscheck that I use as a commuter, touring bike, and road rider. I love the triples up front, I think they really add versitility to an already versitile bike. If I were doing road riding only, then doubles would be a consideration, but then again, why would I have bought a cross bike? I don't know how triples would work with the Conquest, but I would guess its just a matter of the right size BB.
I have a triple on my cross bike which is a converted touring bike. The touring bike makes a great cross bike imo. It has fat tire spacing and cantilever brakes but so far in the races I've found the triple is worthless. In fact I am thinking of taking it off. It is a 50-42-32 and all I ever use is the 42 unless I accidently slip it down. I've got a 12-32 cassette so that gives me a good range w/ the 42. So I am thinking of leaving the front derailure on and locking it in place just to keep the chain on the 42 and taking everything else off. Then in the summer if I want to load the bike and tour I will just put it back on.
For commuting use, you really need the option for rack and fenders. Check that frame has these.
Triple rings are a sensible choice, as is a low-ratio double.
Use a tough touring tyre rather than a knobly cx one will be more efficient and reliable.