Sorry if this has been brought up before, but I did a search of the database and there are SO many cervelo posts that it was like trying to find a needle in a haystack. Anyway, I just got my new P3 yesterday (2003 Model DA), and I noticed that the seatpost is VERY long. I got a 55cm frame (700cc wheels), which according to all my measurements (taken during a fitting, not on my own) and a test run on a friends bike should be the right size. However, I don’t think the seatpost will allow me to get low enough. I’m taking it to get fit tomorrow, and I was wondering if its ok to cut the seatpost or if I have to order another size seat post? Thanks for your help.
Mark you will need to cut it with a hacksaw! Easy to do. You see the line 65mm from the bottom? That is your min amount that you will need inside the frame. The seatposts are very long so when you put it in all the until it reaches the bend in the frame, take a rough measurement on how much higher your saddle is at this point and take 10mm (1/2 inch) of that. Cut it and use a file to make the sharp edges little bit easier to insert. You should now have a seatpost that fit, but the section inside the frame will be longer than the min. 65mm . But this allows you to get the sizing right. When you are happy mark the seatpost again and if you want measure 70mm from the mark down and cut the rest off. That will leave you with +/- 68 mm inside the frame.
There is no ways the seatpost will fit 100% without you cutting it.
Yep. As others have said, it needs to be cut. I was at the bike shop when they took a hacksaw to mine. It’s never a good feeling when someone takes a saw to your $4000 bike, but he knew better than I what needed to be done.
Several lengths of the Cervelo carbon post are available. Unusual that you have to cut it…
If you do cut your exisitng post use a carbon fiber specific hacksaw blade available at most hotrod shops or on line. The teeth are extrememly fine and will make a nice finished cut that will not tear the fibers and rip them free of the encapsulating matrix. When you are done, “sand” the cut smooth and round the edges of the cut with very fine grit sandpaper or steel wool. This will facilitate better, easier saddle height adjustment.
