1997 GT RTS All Terra Mountain Bike Advice on Bearings and Handlebars/Accessories Due to Hand Pain

[TheJay]

That's called a "microadjust post"
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As opposed to "seatguts":
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Not many retrobikers will use seatguts on a post1980 bike - they are for kids bikes, bsos and bmx

That's it, microadjust!

 

[ishaw]

Awesome, so we now know it's definitely 28.8. Do you have any spares?

I'm sure I do. What's your budget as I have anything from a new Thompson to used others.

 

[TheJay]

Great, I'm not after anything fancy. I don't know anything about seat posts, as long as it fits and isn't too long, what else should I be considering?

 

[TheJay]

What would you recommend?

 

[ishaw]

I'd recommend something long enough to give you the height needed to ride, and a fair bit inside the frame. Posts that are too short will result in the frame potentially getting damaged and could result in it breaking. Something long enough that once inserted, goes below the top tube lower weld at minimum.

I'll see what I have.

 

[ishaw]

Here's one I've managed to dig out. 26.8x350mm. strong and solid post.

 

[bikeworkshop]

I'd recommend something long enough to give you the height needed to ride, and a fair bit inside the frame. Posts that are too short will result in the frame potentially getting damaged and could result in it breaking. Something long enough that once inserted, goes below the top tube lower weld at minimum.

I'll see what I have.

I'd suggest 2 inches below the lower weld on an older aluminium frame

 

[TheJay]

Here's one I've managed to dig out. 26.8x350mm. strong and solid post.

Great, thanks!