Tue, 6 Oct 1998 08:07:10 +0200 - Message No. 4181
From: Arne Lindgren

Subject: RE: Stearing Head


Hi al @:s!
This is a common problem on racing bicycles that have the same type or
fork and races, but somewhat flimsier.
So when you check a bikes front races and discover a steering lock this
is because (one of the) the races has developed a depression in one spot
and a similar depression in the other ring of the same race. 
But if you think of it sometime this would mean that you would get the
same lock either on exactly the same angles to the left and right as the
balls (or rollers are separated) or at the angle of the diameter of a
ball.
 But you dont! (If you do, change races!!!!! NOW!)
What will happen is that if you disalign the upper and lower ring a
little (just one degree will do) the lock will probably disappear. And
one degree is well inside the limits if play in the race. In fact as
soon as touch the race you will probably never find the lock again.
The lock is probably a result of too hard setting of the race from the
beginning.
If you feel unsecure, let a bike shop fix it. But if the lock disappears
as soon as you reset the upper race its probably no problem. The lock
can be caused of particles in the grease as well.

Arne (And Mattewerner, the green-white @)      

> ----------
> From: 	Torsten Metzner[SMTP:tom@plato.uni-paderborn.de]
> Sent: 	 den 5 oktober 1998 10:14
> To: 	xrv@atic.org; muehlberger@grz.at
> Subject: 	Re: (XRV) Stearing Head
> 
> |I just noticed the following problem on my @:
> |
> |When turning the steering while the bike is standing, Ineed quite a
> lot of
> |power to turn the steering over the middle position. So I lifted the
> front
> |wheel (with my mainstand :-)) ) and found out, that the steering has
> a
> |position where it "rests" (einrasten). This position is the
> |"middle-position", which means the front wheel is straight.
> |
> |My questions now are: what's the reason, how to fix it,
> 
> Hi Achim,
> in my opinion normally this means that the bearings of the steering 
> (Lenkkopflager) is damaged. If the bearing is fixed to hard (zu stark
> angezogen) then the balls of the bearing will be pressed to hard in
> the 
> bearing shell that's the reason why you have this "resting" position. 
> You have to mount a new one. 
> 
> |and probably how
> |long I can wait for fixing it (which means: is it dangerous) ??
> 
> IMO if I could really feel it, like in your case, while puting the
> steering 
> I would change it very fast, because the steering is one of the
> important 
> parts  of the bike. Just remember how fast you will drive in a bend
> and 
> then think about a resting steering.
> 
> Hope this helps,
> 
>   ToM 
> 
> 



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