Don't be embarrassed. It happened to me frequently with an Ultegra headset I
had on my Atlantis. I had to snug it up every couple months.
More recently, I experienced a similar thing on a different bike, and checked
the usual suspects: brakes, headset, cracks in the frame/fork, etc. Nothing.
Ah HA! Thought so! I remember how, on Riv #1, I installed the lower race
bearing surface (steel running surface for the bottom bearings in the
aluminum cup) somehow upside down. I could not get the danged headset
adjusted properly: either it bound or it was loose -- and damned
frustrating.
I had
Great to hear that you ran down the issue! That is what _success_ sounds
like in bike mechanictry...
- J
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Jim, that self canceling phenomenon can really be the fly in the ointment
when it comes to diagnosis. Well said. And kudos to you for lubing the
threads before retightening, I recently learned that this can help the
fastener bite its match with greater ease, leaving things even tighter.
Closure: It WAS the dang headset. ::embarrassed::
I'm still getting used to a threaded setup.
On Friday, January 25, 2013 6:13:36 PM UTC-8, Tim Tetrault wrote:
Anybody have experience clearing up this forward rocking I have with my
long reach Tektros that are in the standard build for the
Tim,
I had the same problem with some Tektros std reach breaks on one my bikes.
I had some Shimano std reach brakes and switched them on the bike and the
problem went away. The Tektros brakeset had a lot of flexibility in the
quick release.
On Friday, January 25, 2013 6:13:36 PM UTC-8, Tim
Thanks all-
I had some luck today by straightening out the brake itself and matching
the timing of when the pads were hitting the rim. I think I will try and
bring the brake closer to the fork crown and might even try the Sheldon nut
if I have no luck there.
For all that the internet is, I am
Are the brake pads toed in properly? Are the attachment bolts snug? They
come loose over time allowing the caliper to shift. Somethings to check in
addition to Jeremy's notes.
On Sat, Jan 26, 2013 at 8:49 PM, Jeremy Till jeremy.t...@gmail.com wrote:
So the first thing I would try is making
I should have noted that this is *not* a headset issue- though I thought it
was at first. If I hop off the bike and lock the front break and rock the
bike back and forth over the front wheel I can actually see the brake arms
shift forward, eliciting the slight knock, back and forward. This is
Yeah. A knock means something is shifting under load. Something may not
be seated correctly or torqued properly. That's definitely different than
brake shudder. That does look a trifle long in front of the crown. Have
you ever run the bike without the fenders?
- You might take a look at
I'd say that your mechanic is kind of right in that brake shudder can be
magnified by long reach brakes, thanks to the flex inherent in the longer
brake arms, but the long arms are not necessarily the cause. Shudder is
caused by irregularities in braking force--which cause the brake pads to
Photos on setup issues are a good idea.
There are a goodly number of variables in brake setup, as well as perceived
feelings. But, there's really no inherent reason why you should get
vibration from longer arm brakes. It certainly _can_ happen with some
setupsThere was a long set of
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