Joined: Jan 2010
Posts: 9,835
Likes: 1,816
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
You can't slide the clamping parts past any bends in the rails.
Some saddles have slightly different center-to-center rail spacing, which, while often diffeicult to get assembled, usually gets pulled in orspread out with a normal tightening of the bolt(s).
It looks like you're wanting to slide the saddle foreward of where it was designed to fit in the rail clamps(?).
Don't risk damage to this post's alloy clamps. Use a different post if necessary.
And, if the saddle doesn't work out, I could sure use it. ;-)>