Help with a seap post clamp

[ABC]

Hi,

I am in the procees of building my goat, however went into my local bike shop today to see how they are getting on with my bike, and their is a small prolbem :?

On the frame, where you put your seal clamp/bolt etc to secure the post, their is obvisouly the holes where the bolt goes through, but at the 9:00 o'clock postion, there is a small grove :?

Doe any one know what this grove/notch is, do I need a special type of bolt that locks into this grove?

Can I use a normal ringle QR seat clamp?

cheers in advance

Glen

 

[theboy]

At a guess, its there to prevent the bolt slipping when you do up the nut, ordinarily the bolt sits in a sleeve whcih has a gnurled face, therefore it 'bites' into the clamp are of the frame so you can tighten the nut up - what you have described sounds like a neat solution... but might be a pain to replicate/replace!

 

[jimihendrix]

Yeah, the notch is to stop the plain head bolt turning, they can still be found for penies in old skool bike shops or on E-bay in the vintage parts section.

A normal bolt or QR would'nt do any harm though and it'd still clamp the seatpost but i suppose would'nt be 100% correct.

 

[hamster]

It's the standard way for road bikes before the top type clamps which save the welding of the tabs. Amy LBS should have the part. I looks very neat this way btw.