Wheel/Tire not centered?

Thanks, I will provide some more details when I get home to inspect it.

--
Smeltz
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One of the bearings may have slipped sideways on the axle.

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Doug

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Check the unicycle by removing the wheel and flipping it around (make
sure to flip it back after). If it still favors the same side of the
frame, its the frame. If it favors the opposite side, it is the wheel.
If it is your frame, it isn't an issue, one of your fork legs is
slightly longer than the other. This usually is only a problem if the
tire rubs. 2 of my frames (and several others I have seen) have this
issue. If it is the wheel try reseating your tire, and if that doesn't
work, you may need to true your wheel.

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I had this same issue with my 24" Torker DX when it arrived new from
UDC. I had to lean to one side as I rode to keep it going straight,
but then I noticed the wheel (and tire) was closer to one side of the
forks as you described. I added some shims to one side of the forks at
the bearing seat, and this put the wheel/tire dead center after a few
attempts. I cut the metal shims out of the side of a coke can, and
trimmed these to fit loosely into the bearing seat before bolting the
bearing cap on the other side.

-Aaron

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aneedles

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Thanks guys! After closer inspection last night I really believe it is
the frame. I will flip the wheel around tonight as ObieOne has
suggested to verify this.

The Shims sound like a good idea. I will let you guys know how it
turns out.

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Mine happen on a good upd. I too put a shim in. I like the coke can
shim idea. It doesn't take much shim with a 3"fat tire.
Though I'm still dumbfounded why it actually happen.
😕

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critter

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Doug said:

One of the bearings may have slipped sideways on the axle.

That's not that uncommon, it happened to me.

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TheBadger587

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critter said:

...Though I'm still dumbfounded why it actually happen.
😕

what happens is frame "leans" at the leg/crown joints. sabin bent a
Yuni frame pretty bad trying to grind. He landed hard on the bearing
housing which caused the frame to lean towards the grind side and tire
to rub on the non-grind side.

It seems like there is a lot of welding going on in the crown area of a
kh frame. All the heat causes expansion if it dosen't contract equally
the frame could be slightly off. but if your tire isn't rubbing, there
is nothing to worry about.

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Thanks for all the advise. I finally have some pictures to show the
magnitude of the problem. As you can see, the tire is noticably off
center but in no danger of rubbing. I tried to take these from an
unbiased angle.

The wheel is true. I flipped the wheel the other direction on the
frame, as was suggested, and the wheel still favors the same side of
the frame. So it must be a frame issue.

Is this off center enough to worry about? I am thinking about trying
shims.

14193

14194

14195

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|Filename: IMG_2844_MOD_1.JPG |
|Download: http://www.unicyclist.com/attachment/14195 |
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I can't tell if the frame is bent from the photo. You should be able to
roughly tell using a carpenter's square. If you're going to shim, you
want to move the tire by half the difference of the distances from the
left side of the tire to the frame and the right side of the tire to
the frame. The shim needs to move the right leg up as viewed in the
photo so should be placed on top of the right bearing. It should be
roughly thick enough so that when multiplied by the ratio of the wheel
radius to the center bearing spacing you get a value equal to half the
difference of the distances you measured. Then iterate from there.

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I have the exact same wheel as you and mine does the same thing...But to
the other side...I just dished the wheel so that its centered in the
frame...But i dont recomend it. Id say you should try some pop can
shims.

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harper said:

Bruce-
Quick. Put me on e-Bay.

w00t...i got reply # 60666 in MR
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my kh4 dosen't meet the bearings of the kh4 hub evenly 🙄 , and
neither does sabin's. looks like you might have the same issue. loosen
the bearing housings, and re-clamp with the frame in a more centered
position.

to answer your question, no, it is not off centered enough to worry
about. riding it like that wont do any damage to the uni, it's just
cosmetic.

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However, it is not "just cosmetic" if it requires the rider to lean to
one side to compensate as I found to be true in my case. Centering the
tire fixed the "lean" issue as well. Maybe I'm just more sensitive to
this kind of thing. :>

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I have the same frame and the same "problem." Mine is about as bad as
yours. You can shim one leg with slivers off a soda can but its more a
cosmetic thing than a performance thing IMHO.

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\"obie is definately a trend setter, i got in to unicycling because of
him, and came here because of him\" - kj-52

\"try not to annoy the great obie, for he is better than us.\" - murde
mental

*disclaimer: the above message was not intended to offend anyone. if
you are offended i can take no responsibility for my actions because i
don't feel like it. also you are reading an internet newsgroup where
not everyone will share your same views and beliefs, be able to take
criticism and post/read threads at your own risk.*
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