seat pin collars

[tim-b]

Hi
It's a plain 27.2 (the lip was filed off) it locates the seat so you could at least sit in an emergency
Regards
tim-b

[Brucey]

got 1.5 million pairs of socks, no jubilee clips.

.

I'm surprised no-one has suggested stuffing the seat tube full of socks....

cheers

[pwa]

Looking at the Thomson site (I think their collars are better than most) their sizes go up in steps of 1.2mm or more. I reckon I could tell which I needed by measuring carefully with a ruler. 1.2mm difference is very visible.

[mig]

got 1.5 million pairs of socks, no jubilee clips.

.

I'm surprised no-one has suggested stuffing the seat tube full of socks....

cheers

it crossed my mind yesterday.

bit 3 bears this. 28.6 too small. 31.8 too big. 29.8 juuuust right. i think you were correct there upthread.

[tim-b]

Hi
Now that I'm home the 27.2mm clamp is a specific accessory clamp, the bike with a larger seat post has a modified seatpost clamp as shown below
Regards
tim-b