I use the stock 30.9 mm Easton EC70 that came with the bike itself. So I'm pretty sure the size is correct. I'll check it with a caliper nevertheless.ChunkyMonkey said:Do you have the correct size seatpost? May want to check with a set of digital calipers. Unlikely the wrong size, but best to check everything to be certain.
I am not too heavy either, at 150 pounds. So it's definitely not the weight thats pushing it downrockyuphill said:If your shop has any of the TACX carbon paste you can apply that to the post, that will increase the friction at the clamp, it ships with a lot of carbon parts like FSA, it's a red jelly-like paste with some scientifically appropriate grit mixed in. My seatpost clamp is tightened using the short arm on the 4mm allen key to apply the torque with a thumb and forefinger, using the TACX paste, that is enough to keep the post from moving under my 195-200pound butt.
Over tightening can hurt the seatpost as well as the frame.
I'll try getting behind the saddle, I agree toning by techniques is a lot better than looking for other options.RMB-PM said:It's a bit tricky with carbon on carbon. The Tacx paste works great, though plain ol' chalk works too sometimes. Whatever you do, DON'T grease the post. I assume you haven't already?
PS: this may seem incredibly obvious to you, but saddle selection is key here... I tried a WTB Devo a few seasons ago (my standard saddle at the time was the WTB Rocket V), and I couldn't get behind it to save my life. Way too much flare for me, my *huge tree trunk thighs * kept catching... Immediately went back to the Rocket V.
A maiden ride in a XC race wasn't the best idea...:nono:Sweptwind said:My Vertex RSL's maiden ride last weekend happened to be an XC race - I was goaded in to racing it on its first outing by my mates. I thought - well, so what. Gotta get stuck in. Towards the end of the first lap, legs and back were burning, so suspected seatpost slippage, and found it was down by over an inch. Bit of rummaging to get the allen out; underway in about a minute. Now 3/4 way down the field. Same thing happened on the second lap. On the third lap, stopped again, but found it hadn't slipped down. Same on the fourth. So basically, all this stationary action wasn't conducive to a good race result.