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Flexy bottom bracket on 04 Trek 5900?(5 posts)

Flexy bottom bracket on 04 Trek 5900?harcourt
Nov 25, 2003 7:06 PM
I just read a post, by Russ I think, who thinks that the bottom bracket on the 5900 is flexier than the 5500. I ride a CAAD7, and I don't want to give up any stiffness in my new bike. Russ seems pretty smart so I wonder how much flexier is the 5900 and how much heavier is the 5500? I had my heart set on the 5900, but now I don't know. BTW I weigh 160 but push pretty big gears for my size. Any helpful thoughts? I kow this subject has been discussed. Thanks
re: Flexy bottom bracket on 04 Trek 5900?gray8110
Nov 25, 2003 7:09 PM
I've ridden both, the 5900 in my experience is stiffer in all directions. The difference is negligable though - I can't comment on the '04 frame though.
We're talking specifically about the 04...russw19
Nov 25, 2003 7:23 PM
Trek made changes to the internal Bottom Bracket Lug to lighten the frame. As a result, I tought it was more flexible. It's not just the difference between the Carbon 110 and Carbon 120 frames (2003 5900 and 5500) but for '04 Trek redesigned the 5900. It's a different and new frame.

Russ
re: Flexy bottom bracket on 04 Trek 5900?russw19
Nov 25, 2003 7:17 PM
I noticed more BB flex. Trek lightened the bike by redesigning the internal BB lug. As a result, the frame is lighter, but I also noticed more BB flex. For the record, I weigh between 215 and 220, so I have you by over 50 pounds. I also have huge legs and can squat over 500 pounds... so I may be stronger too, but I won't bet on that. I said it in my original post that you read about the Madone in particular, but I would say the same for the 5900 too. RIDE IT FIRST! Test ride it and see, you may not notice the flex.. and at 160, I wouldn't be surprised it you don't. But it is slightly more flexible (in my eyes) than the cheaper 5500. It also has nicer parts on it and a nicer fork. Test ride it, that flex may make it super comfy to you. I personally find stiff aluminium bikes comfy, so don't take my word on it, ride it and make up your own mind.

Good luck, and BTW, even though I noticed more flex, it's still a kick ass bike.

Russ
if you >200 lbs you would be better off with a 5500 or 5.9andy02
Nov 28, 2003 10:11 AM
The weight difference is not great enough for a 200 pound rider to buy a 5900. Even the bigger and/or stronger posties and other trek supported people don't ride them. The big, strong, land hammer heads I know love the 5.9.