What was the release for Terex?
It's all about range I think. My old '70s 10 speed had 39/52 and 12 - 35, my 2003 Bianchi Vlope has 30/42/52 and 11-34. Only a little wider with it's 27 than the old one with 10. I usually don't try to fine tune my gear selection but go till I need to shift, but I do like being able to go low if only for part of the hill for a rest. No I don't race.
Joe