The front of the Q45 is basically an S40 front end with a very long steer tube. That is needed to get the right clearance for the upright seat angle. It is extremely easy to ride and set with mountain type gear.
A triple will work "technically" on this front end - BUT - I have had very limited success getting a decent chain line due to various interference with the clamps and/or front DR pulley - so I will not make recommendations for people looking to do triples. The market is largely abandoning triples for 2x and 1x setups with wide cassettes anyway, so YMMV getting shifters, etc that will work.