[Closed] Slotting a Seatpost - Great Idea?

Edit. Why not just cut the seatpost down so that you have the minimum insertion when at full height. I wouldn't want to slot it beyond that point anyway. Or, just fit a dropper post.

So 14cm in the frame, of which 10cm would be "compromised", and the other 4cm is above the top-tube/ seat-tube weld (after looking at my Soul). Sounds risky to me. I'd want a decent thick-walled seatpost, so the bottom section stays round - if the tube collapses into an oval/ teardrop shape, it may as well not be there.

I take it you've tried taking out the obstructing bolt? Can you file down the back of the bolt boss? or ream the tube to remove it?

If I cut the post down then there isn't really enough post left in the frame at full height. So this is sort of a compromise. I debated a dropper but I'm not convinced I've got enough space to get it down far enough.

Tried taking the bolt out, but looking down the seat tube, it seems that the; bolt hole boss thingy is quite big. I don't have a reamer, plus I've never seen one long enough to go down that far.

I might just buy a cheap seatpost as an experiment.

The section with a slot in it will be far, far less stiff - so all the load will be going through the short section you haven't slotted. Sounds like a recipe for snapping the top off your seat tube.

Don't. Maybe consider cutting a small amount off the bottom of the post to give yourself a little more space to drop. I'd also advise minimum insertion - don't go close to it, you really want more for strength.

I might just buy a cheap seatpost as an experiment.

Is it less painful when a cheap seatpost tears your arse open when it breaks? If you're lucky, you'll fall off the back and it'll only rip off your nutsack.

Brand-X dropper post for like.... £99 these days!?

Dont do that, if the seatpost snaps you'll have a sharp jagged edge right next to your femoral artery.

If that edge cuts your femoral artery you will bleed out all over the trail and some unlucky bugger will have to clean it up.

But it won't be you because you'll be dead.

Ok I think I'll drop this idea!

What size post? Can you use a smaller diameter one with a shim to avoid catching on the bolt? Maybe a 25mm USE one would get the space you need? Maybe even an offset shim in full desperation, although I don't know if they exist.... Or a telescopic post?

Get one of those telescopic seatposts, like you can buy for a Brompton.

I'd be more inclined to drill the boss put of the seat tube.

I’d be more inclined to drillde-braze the boss put of the seat tube.

A frame builder should be able to do it pretty quickly (or just get a MAPP torch from B&Q, put a bolt in the fitting, get the fitting hot and pull it off with pliars). Might even be able to braze a patch over it to leave it neat.

What onzadog said.

Drill the bottle cage boss out. I did it for a friend to fit a dropper post in his Trek Marlin.

Take your time, be gentle and then put a bit of electrical tape over the hole when finished.

Get one of those telescopic seatposts, like you can buy for a Brompton.

I had a Titec Scoper years ago on my Norco, in theory it was a good solution but in practice it was heavy and nowhere near as useful as it appeared.

I had a Titec Scoper years ago on my Norco, in theory it was a good solution but in practice it was heavy and nowhere near as useful as it appeared.

I used a home-made one on a Spesh FSR about 20 years ago because it had almost zero seat height adjustment. It's basically just an extension for the seat tube for bikes . It gives you more adjustment that is possible with a regular seatpost. It's better than nothing, but a dropper post is much better if you can fit one.