Spreading a seat collar?

[Velocipede]

Originally Posted by ultraman6970

I know it has a barrel nut, so whats the problem??? just put the thing backwards from the barrel nut in with the coin in the middle.

The bolt goes all the way to the other side so use the exit hole to get the bolt in... and put the coin in the middle.

Sorry. Meant to say you can't do that with a Thomson cause the bolt it comes with is too small to use a coin cause of the barrel nut vs it just threading in to the alloy itself. Typing too fast and wasn't paying attention.

[charliedid]

Originally Posted by A1A

I hear ya', I'm not thrilled about the way things worked out for something so simple. Not a risk taker other than for being a road rider in general these days... I love Thomson but the more I read the more I see that their seat posts tend to be on the small side of for example 27.2. I never realized seatpost sizes were "nominal" and vary by brand by as much as .1 to .2 either way. Learn something new every day.

But I have a plan "B". I was searching around and discovered that Wolf Tooth which is another made in the USA product spec's their 28.6 collar as fitting 28.6 to 29.0. My calipers aren't the greatest (composite arms) but I come up with an OD of the seat tube of around 29.0 to 29.1 so I ordered a Wolf Tooth to see if maybe that slides right on or worst case I have to spread it maybe .1 ish instead of .4 to .5 with the Thomson. Should have it by the end of the week and will test.

Wolf tooth one is nice.

A never ending process sometimes. :-)

[ultraman6970]

Campagnolo ones are good aswell.

[jtbadge]

I dunno, man. Seatposts get scratched. I'd just use the Serotta collar that you know is the right size for your frame.