Originally Posted by
AlphaDogg
I usually remove the saddle+seatpost assembly and lock it up with my braided steel lock through the rails, but when I lock it up, I usually lock it up in pretty low-crime-rate areas... I'll see if I can grab a seat clamp off of an older bike that I have in the garage that lacks a quick release....
Just buy a new one if you can, as they are pretty cheap and then you can get the shop to measure the size to ensure you get the correct clamp. I'd imagine under $5 US. You can get a variety of colours too. If you do, remember to put a smidgen of grease on your post before you slide it in.