Bicycle Mechanics - Seatpost Binder Bolt Length Question
Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.
01-09-11, 06:23 AM
I am restoring an old frame and I need to buy a new seatpost binder bolt,
It is a keyed binder bolt. The bolts listed online are listed with lengths
such as 19mm, 22mm, 25mm, 27mm, etc.
What does this length mean? Is it the width between the flanges when
How do I measure to determine the proper length bolt?
Arvadaman, Measure the outside to outside distance of the seatpost binder, add about 5 mm for the width of a nut and that should be pretty close.
Bolts are always measured from under the head to the end, so for a Plain bolt that takes a nut you have to add length for the nut.
Allen key binder bolts are measured the same way, the distance under the heads when fully tightened. When buying these you want to deduce a few millimeters to ensure they don't bottom out before the seat is tight.
As Bradtx said, either wat you're comparing to the width of the clamps ears.
Powered by vBulletin® Version 4.1.12 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.