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How do I change seat angle on Shimano 600 seatpost?(4 posts)

How do I change seat angle on Shimano 600 seatpost?LAIrish
Jul 26, 2002 4:52 PM
I have an older Klein with a Shimano 600 seatpost. My seat is at a severe forward angle, pushing me against the handlebars. I would like to change the seat angle but I am having problems doing so.

Whenever I thightent the bolt on the underside of the clamp, the seat leans forward. There is an allen bolt in the front of the seatpost (parallell (sp?) to the top tube), just below the clamp, but loosening it or tightening it does not seem to have any effect on the angle of the seat. (In fact, I can't figure out that is has any effect whatsoever.)

I checked the Shimano website, but it does not seem to have any information on this component.

Any advice?

re: How do I change seat angle on Shimano 600 seatpost?Dave Hickey
Jul 27, 2002 12:42 PM
I've had the same problem. You just have to keep trying. Loosen the clamp all the way so the saddle and clamp can lift off a little from the post. You have to set the saddle and clamp in a different spot on the post. It's hard to describe but the single clamp bolt adjusts and tightens the saddle.
Let me try to explain this another way.........Dave Hickey
Jul 27, 2002 2:11 PM
The seat post and the seat post clamp have grooves. When tightened, the grooves go together like teeth on gears. When you loosen you saddle and tilt it down in front, you're staying in the same groove. You need to loosen the clamp enough to get it set in another groove on the seat post.
re: How do I change seat angle on Shimano 600 seatpost?curlybike
Jul 27, 2002 4:03 PM
Besides what Dave said. If you loosen the clamp bolt entirely and lift off the top plate and revolve it 180 degrees , the screw hole thru the plate is in it at a slight angle. This will give another range of adjustment. Does your saetpost have the little screw in the front of the seatpost? If so, you can use that to change the angle while all of the parts are loose after loosening the main clamp bolt.