Peter, Triple BBs are around 5-10 mm wider than a double per side. Q factor is also effected by the crankarm shape, ie. straight or curved inwards. I don't notice the difference between my triple and doubles, perhaps if I were looking for it by riding each back-to-back I would. Could the Q factor be a contributing factor to her hip bursitis? Possibly, as could just simply riding a bicycle. I think the best idea is to consult a doctor, preferably a sports physican.

Brad