One other thing to consider regarding Pro fit vs Performance fit -- the Pro bikes come with standard cranks while the Performance models come with compact cranks. Your shop may be willing to swap out cranks -- our local Trek dealer is very resistant to swapping components on new bikes, and doesn't really give you any credit for what the bike comes with. I don't know if this is just *that shop* or if there's something about Trek's pricing schedule that would incline other Trek dealers to act similarly.
As to the headtube thing -- I wouldn't overthink it too much. If you can, I think the best thing to do would be to take both out for a good long test ride - maybe more than one good long test ride -- and see which one feels better. Maybe have them fit you on both bikes if they're willing to take that kind of time, and see which one is easier to fit. The difference in a size 52cm looks like 3cm -- a little over an inch. You could at least split the difference with spacers/stem rise.
As far as which one to get -- well that depends entirely on your budget. You won't go wrong with the 5.2 -- it's full Ultegra SL. The 5.5 bumps up to Dura Ace. The 6 series models are made of Trek's Red OCLV carbon (5 series are made of Black OCLV carbon). The only way to know what difference this makes is to ride them. I haven't ridden any of the Treks since they split the OCLV into three grades, so I can't offer any advice. I can say that in 2007, I rode both the 5200 (TCT) and the Madone (OCLV 110) and the difference in the feel of the carbon was significant -- the OCLV was much livelier and smoother. As I said though, I have no idea how the new grades of OCLV (white, black, red) compare. You'll be able to tell whether it's worth the extra $$$ for the Red OCLV when you ride it though. It's early (I couldn't sleep) and my brain isn't quite awake yet, but the only difference I could see between the 6.5 and the 6.9 is that the 6.9 comes with sexy carbon wheels and lighter handlebars -- everything else seems the same. Unless you'll be racing or have a mega weight obsession, I'm not sure I'd drop an extra $3k on those upgrades. Both 6.5 and 6.9 are full Dura Ace.
Not sure if that helps...
If it were me??? I'd probably get the 5.2 Pro. But that's the frugal New Englander in me speaking. The other bikes are beautiful and there's no question that you ARE getting nicer goods for the $$$ -- it's just a question of whether the difference in enjoyment for say, Dura Ace over Ultegra SL or Race XXX lite wheels over Race X lite wheels is proportional to the difference in cost. For me, right now, I would say it isn't. But if money were no object at all I'd say go for the 6.9. You'll probably want a set of training wheels though -- I can't imagine riding those deep-rim carbon wheels all the time.



). Has anyone ridden one or both of these bikes??? It's getting so confusing!
Trek tells me that the *pro* fit is most similiar fit to what I'm riding now, but the local bike shop is encouraging me to go for the performance fit for a more comfortable ride... Also, there's the question of the 5.2, 5.5, 6.5..... All of a sudden, what should be an enjoyable experience, is turning into a nightmare! Any help/ideas would be appreciated! Thanks!
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. You won't go wrong with the 5.2 -- it's full Ultegra SL. The 5.5 bumps up to Dura Ace. The 6 series models are made of Trek's Red OCLV carbon (5 series are made of Black OCLV carbon). The only way to know what difference this makes is to ride them. I haven't ridden any of the Treks since they split the OCLV into three grades, so I can't offer any advice. I can say that in 2007, I rode both the 5200 (TCT) and the Madone (OCLV 110) and the difference in the feel of the carbon was significant -- the OCLV was much livelier and smoother. As I said though, I have no idea how the new grades of OCLV (white, black, red) compare. You'll be able to tell whether it's worth the extra $$$ for the Red OCLV when you ride it though. It's early (I couldn't sleep) and my brain isn't quite awake yet, but the only difference I could see between the 6.5 and the 6.9 is that the 6.9 comes with sexy carbon wheels and lighter handlebars -- everything else seems the same. Unless you'll be racing or have a mega weight obsession, I'm not sure I'd drop an extra $3k on those upgrades. Both 6.5 and 6.9 are full Dura Ace.
. You'll probably want a set of training wheels though -- I can't imagine riding those deep-rim carbon wheels all the time.
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