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seat clamp stuck
my friend recently bought a kalloy uno seatpost. after one ride she decided that she wanted to adjust the angle of the seat. but after loosening the clamp, she has found that the bottom half of the clamp is stuck to the seatpost and will not budge. everything else can be removed except that bottom half of the clamp where the grooves are. it is so stuck on that she is able to lift up the whole bike just by holding that part.
what has happened or what has caused this? how can she fix it? |
Hit it with a hammer.
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she did . . .
kinda worried about damaging it |
Originally Posted by 7eleven
(Post 8544151)
she did . . .
kinda worried about damaging it Sounds like you were too timid about it to really be doing any good with the hammer. Just hit it much harder; its a piece of aluminum not carbon fiber, they make baseball bats out of aluminum... Better yet, remove the entire seatpost from the frame, and holding it by the bottom end swing it hard to hit the bracket end onto the concrete floor of your garage, should fly right off.
Originally Posted by A.Winthrop
(Post 8544250)
Hi,
. If its aluminum in contact with steel, try getting strong ammonia in there. It will attack the aluminum oxide bond. If the seatpost has flutes, use an eyedropper to fill the flutes with the stuff. If not, wrap a rag soaked with ammonia around the seatpost. In either case, wait a few hours before trying to twist out the seatpost. . Household ammonia will not work. You need strong ammonia, available at hardware stores for a US$1 a quart. It is unpleasant stuff so protect eyes, clothing, small children and pets. . If it works, turn the bike upside down when pulling the seatpost out so excess ammonia doesn't run down the seat tube into your bottom bracket where it can attack lubricant. . I've had good luck with ammonia on a fluted seatpost and on aluminum\steel brake caliper\adusting screws. I've even used it to help free up a screw-on 6-spd freewheel. But others here are not as keen on this solution so I conclude that it is a bit of a crap shoot. In any case, good luck! . However the problem in question is merely about adjusting the saddle angle; the angle adjustment piece of the bracket is stuck. |
Some seat rail clamps will not move until they're falling apart loose. Was the bolt loosened enough? They do stick from time to time, especially when very new or very old, new in this case. Loosen the bolt until it has a lot of slack, and hit the lower clamp piece upwards firmly with a rubber mallet. They're readily available at any hardware store for cheap.,,,,BD
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