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cutting seat post(13 posts)

cutting seat postmackgoo
Jan 18, 2002 3:03 PM
I have a carbon seat post I'm using for a cross bike set up. Any way I can't get the seat post in far enough. I'm thinking I need to cut it. I was wondering if there is a fundemental problem with this solution.
Cut your lossesKerry Irons
Jan 18, 2002 5:02 PM
The question is: What is it hitting in the frame that keeps it from going in? Anyway, as long as you have enough post in the frame, cutting your post is no problem. Use a fine tooth hacksaw blade and have a guide to keep you cutting straight. After you've made the cut, dress it up with a fine file followed by finer sand paper so that you don't leave rough edges.
cutting seat post, don't do itKStone
Jan 19, 2002 2:11 PM
"Any way I can't get the seat post in far enough." is usually caused by the post hitting the upper water bottle cage mounting screw. Remove the bottle cage from the seat tube and try to push the seat post further down. if you get the correct adjustment cut off the cage mounting screw, NOT the post!

KStone
cutting seat post, don't do itmackgoo
Jan 19, 2002 4:37 PM
Why.
cutting seat post, don't do itmackgoo
Jan 19, 2002 10:14 PM
I know the problem to be that the seat tube looks pretty rough down there. This is an old Alan frame and about 6 inches down is where the true seat tube set is and as I say it's rough. I think first I'm going to get some kind of hone and carefully try to smooth it some.
I'm getting impatient as I've been building the bike with the help of E bay and it's taken a while to get all the components together. I need to slow down and finish the job right, if I can.
6 inches is enough for any man and his seat tubenaff geezer
Jan 19, 2002 11:13 PM
unless your a giant.

just get a nice sharp hacksaw and cut away. file off any rough bits and sand it all smooth. you will be fine. a bit of grease before insertion and your home. its not rocket science like some think.

an old alan eh.... nice!!!

is this what all the c-record bits are going on?
6 inches is enough for any man and his seat tubemackgoo
Jan 19, 2002 11:28 PM
Actually I switched gears and dumped the C Record stuff. That hurt, I wanted to save it for latter but my "DEAR" wife couldn't understand that. I'm building a cross bike. I get this darn seat post in and I'm ride'n.
hold on to that babynaff geezer
Jan 19, 2002 11:50 PM
few people know that ALAN built bikes for colnago.
twin tubes and all :-)

make sure you post a pic when its done.

and don't worry about the c-record. give ebay a miss. but keep the cranks if you still have them as they are getting rare. my estimate is that there are 5,00 sets of delta brakes and we have all given them a go once or twice before going on to something different.

this stuff is way better, cheaper and NEW
http://www.facoho.freeserve.co.uk/dcn/nscott.htm#crecord

good luck
hold on to that babymackgoo
Jan 20, 2002 12:37 AM
If your in the UK do you know of any way to get the Bianchi carbon crankset?
Finallymackgoo
Jan 20, 2002 5:46 PM
Almost done. I need to put the chain on. I've been using the Fosters link and now don't have a chain tool. I'll get one tomorrow so I can take the Campl link off and put on the Fosters. 21.4 lbs if I lose the Brooks I'll get under 20, but I love my Brooks.
hey mackgoo, thats a spankin' ridenaff geezer
Jan 20, 2002 11:29 PM
very nice indeed. i love the old shamal's (i have a rear too) and the cinelli grammo(?). nice balance of bits.

truly unique. well done.

keep the brooks your ass will love you for it. enjoy.
re: cutting seat postwspokes
Jan 21, 2002 4:39 AM
Just remember the contractor's famous statement in regards to cutting a board for a house..."I just cut this damn thing 3 times and it's still too short."
Cutting carbon! By the way, beautifull bike.allervite
Jan 21, 2002 2:06 PM
You should not cut carbon with a hacksaw. It causes splinters which lead to cracks that grow with vibration. That is where a lot of those vertical cracks you hear about with carbon seatposts come from. You should use a tile blade on the hacksaw. It is round and covered in grit. It does the cuttingh and filing all at the same time. You can get one at Home Depot. An even better way is to use a tile blade on a chop saw.

Also, never use grease on a carbon seat post. It aint gonna rust, so it will not chemicaly weld itself inside the seat tube. Unless it is synthetic the grease may also eat the resin off the post. If you are worried about water getting in the frame, seal it with candle wax.