Seatpost questions

lochussie

I just had a crappy landing from 4 feet and bent the Orange post on my P7. It's probably still useable but I'm thinking it'll be more likely to snap next time around, is this right? Assuming I need a new one, should I mark this down to bad luck and get any old decent post or should I buy something branded as AM or FR? I don't mind lugging a bit more weight if it means things aren't going to break.

There is a metal shim between the seat tube and post (27.2mm). Is this to get a snugger fit, or is it being used as an adapter and I could stick in a wider post without the shim?

Finally, there is a lot of rust on the outside of shim, inside the seat tube and on the top of the bottom bracket. Not sure whether it is from shim and/or frame (cro-mo). Is this normal?

Cheers

supersonic

Yes, bin the old one!

The shim is indeed an adaptor. Not sure what size the Orange is, memory says 29.8mm but I am sure someone can correct me!

What seatpost is it?

lochussie

It's a standard Orange post. Measuring the inner diameter of the seatube gives about 29mm.

supersonic

Need to know exact the fraction of a mm. I think it is on the Orange site.

What is your budget? And can you still have children after that landing?!!!

lochussie

Orange site says 29.6 shimmed to 27.2. Are wider posts stronger? Budget: I just want an easy to set up post that can take some abuse, not going to pay for brand name, it's only a seatpost after all. I'll go as high as it takes to achieve this.

Should still be able to procreate, didn't seem much of an impact, was surprised it bent. Any ideas on the rust?

supersonic

Cromo frames do rust - they can be treated inside with waxoyl or similar.

Wider seatposts can be stronger, but depends how made - smaller seatposts often have thicker walls to compensate. Not many 29.6mm posts about, so may be an idea to keep the shim and use a 27.2.

Cheap n strong:

http://www.shinybikes.com/bikes/fsa-sl- ... tpost.html

bbspolo

what about carbon set post's these any good?

supersonic

Some are. Some arent. They are built varying to the use.

lochussie

I had to buy a crappy one for Sunday ride, will get one that I can actually make the saddle horizontal on ASAP. Cheers for answers.