I am going to show my old number 1 bike a bit of tenderness this weekend as it is now serving as the daily commuter and has suffered for it. Before I do that I would like to dip into the collective wisdom on a particular issue I seem to be having with it: The saddle clamping.
The bike is a 2011 Cervelo RS… Soooooo comfy, especially with 28mms. Running 25s ATM because of the winter fenders/mudguards. Anyway it came with a Fizik Airone flexwing which I finally had to replace last year. After a rather protracted and painful search years ago I finally landed on a perch that my boney old arse could manage: The Fabric scoop. So once the Arione died that was the last bike to transition to the scoop. So it went on the middle of last year. Now it seems to be struggling to stay clamped. First incident was when I rode Flanders in September and seat dropped going up the Patterberg. Ho hum I thought; it was just an oversight in the torque. But it wasn’t gradually over the course of a couple of weeks I begin to notice that I am perching more and more on the nose of the saddle. Then lo and behold the witness marks are all the way back again. So I tap it forward and ratchet up the clamping torque once more. And the cycle begins again. As I like a forward position and probably should run with no layback it is obvious now looking at my little saddle bag. In the correct position this thing sits up. When the saddle has drifted back it lays flat.
The saddle post is the stock 3T Doric(?) which is a CF tube and (I think…magnet test this weekend) steel clamp head: standard two bolt cradle design.
So I could go with the beer can shims but what should I be attentive of when I disassemble it on Saturday? I am think of checking the rail cups on the clamps (rather than the cradle) for alignment and if they are steel and misaligned ‘persuading’ them back to a tighter radius. Other than that I am kinda stumped…