So, having had our rather wonderful tandem completely refurbed, my rather wonderful stoker has a conversation with another couple with a tandem.
The subject of suspension seatposts comes up. Our stoker seatpost has an ancient "post moderne" suspension post. Theirs has a Cane Creek Thudbuster, apparently the Rolls Royce of such gear.
I duly promise to get one. I am wary of seatpost sizes, so purchase a micrometer to properly check. The post moderne has a 25.4mm post, but with a shim. I check the pilot seatpost to get the right size. 27.2mm. Thudbuster of same size purchased.
Turns out said Thudbuster needs elastomers changing for my stoker, too svelte for standard. I spend some time this morning doing that. I then remove old seatpost, and fight with annoying clamp to remove saddle. I fit saddle to new seatpost, carefully measure insert length and thoroughly grease.
I fit new seatpost to frame. Or, rather, I don't.
BECAUSE THE REAR SEATPOST IS A DIFFERENT SODDING SIZE TO THE FRONT ONE.
Who on earth ever thought that was a good idea??
The rear appears to be 26.4mm, a size I wasn't even aware existed.
GAAAAAAH!
[cross posted from cuk, but as I'm *such* a fecking div, seemed worth it]