Crunching noise when rolling

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Barry Gourley
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Crunching noise when rolling

Post by Barry Gourley » Sat May 01, 2004 3:03 am

I'm running a set of Avila's on 105 seismics and when i start to roll i get a crunching noise from the wheels. It that the bearings or the way the wheels flexes as weight is put on them? whatever it is its really annoying.


thanks Barry
Thanks,
Barry

Ramón Königshausen
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Post by Ramón Königshausen » Sat May 01, 2004 10:19 am

There's the same problem on my Avalons. I think that the bearing doesn't fit excact into the hub. Maybe you could space it out with some extra thin aluminium discs. [...] Maybe it disapears from time to time.
A really annoying noise!

rmn

Dave Gale
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Post by Dave Gale » Sat May 01, 2004 1:30 pm

I've experienced it as well, and have decided it was the vast difference in hardness from wheel to hub (the softer duros seem to be worse than the harder. I've also noticed it dissapears at speed (since the weight/distortion is more dispersed). It occurs on my Gumballs (in softer duros) I've decided to live w/ it since these wheels are both worthy of the annoyance!
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Barry Gourley
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crunching noise when rolling

Post by Barry Gourley » Wed May 05, 2004 8:13 pm

I've been hearing the noise in both of my 3DM wheels,I'm running ceramic bearings in both..... but even when i run standard bearings(steal balls) it makes the same noise. As a mechanic these little thing annoy me so I'm going to figure out a way to stop the noise.
Ive been thinking MAYBE its the bearings on the 7.77mm axle flexing as weight is put on it.
does anyone have trucks with the 8mm axle and still have the crunching noise?? with standard bearings?? i guess thats the big question. Or what about builtin bearings on a 7.77mm axle... does that make noises????

this is my question of the week.
Thanks,
Barry

Ramón Königshausen
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8mm axle

Post by Ramón Königshausen » Wed May 05, 2004 8:55 pm

I'm runnig the Airflow OS Truck with a precise 8mm axle but the crunching noise is still there. Even if i change the bearings (Bones, SKF or Kryptos) The problem is the wheel...

rmn
Last edited by Ramón Königshausen on Wed May 05, 2004 8:59 pm, edited 1 time in total.

Dave Gale
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Post by Dave Gale » Wed May 05, 2004 8:58 pm

Virtually all my trucks are 8mm and I've used several bearings..I'm tellin' ya' I think the noise ids coming from the different distortion rates of the harder hub and the softer formula urethane!! It seems to smooth out/dissapate at speed...no?
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Post by Ramón Königshausen » Wed May 05, 2004 9:14 pm

I don't think so...I'm running 85A and 80A Avalons, the noise comes espacially from the 85A ones [...] But i don't have this problem with my 86A Cambrias....otherwise a friend has it with the 90A Cambrias...I think it doesn't make a difference which hardness you have.

rmn

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Post by Dave Gale » Wed May 05, 2004 9:26 pm

My thoughts and experiences aren't just due to duro, but formula! I have no such noise w/ other wheels w/the same set up Gumballs Kryps etc... I think the urethane 3dm uses is more "pliable" then the cores of such wheels! Just a thought..but a very thought out and experimented thought
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Post by Ramón Königshausen » Wed May 05, 2004 9:47 pm

Isn't it just the Core who makes the difference?

rmn

Dave Gale
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Post by Dave Gale » Wed May 05, 2004 10:22 pm

most manufacturers use the few cores available.. Stingers use the same as LaCostas etc... And the cores seem to vary little as far as materials
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Barry Gourley
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crunching noise when rolling

Post by Barry Gourley » Wed May 05, 2004 10:38 pm

Ramon,
you might be right i put some sector nine 9 ball wheels on my trackers and they didn't make a noise.
Thanks,
Barry

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crunching noise when rolling

Post by Barry Gourley » Thu May 06, 2004 12:21 pm

Dave,
your saying the gumballs make the noise also??
Has anyone tryed the new minx,linx i dint remember the name how is the grip and speed on them?
Thanks,
Barry

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Post by Dave Gale » Thu May 06, 2004 1:07 pm

Barry,
Nope! I have several sets of Gummies and 3DM/Trackers and about 30 other flavours...the noise I speak of comes only from the Turner/3DM formula. It seems to me that the qualities/chemical make-up of the 3DM's differs from most other brands(which makes them fast and grippy) but seems to have issues w/ core adhesion...
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Re: crunching noise when rolling

Post by Frank Henn » Thu May 06, 2004 5:01 pm

barry gourley wrote:Dave,
your saying the gumballs make the noise also??
Has anyone tryed the new minx,linx i dint remember the name how is the grip and speed on them?
Manx maybe? My wife won a pair, we put em on the roe and they rock. She has the reds. I have the crunching noise in my availias and avalons. No noises from the manx. I think the manx take alittle breaking in period but get through that and they some very nice wheels.

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Post by Ramón Königshausen » Thu May 06, 2004 5:46 pm

"MANX are trimmed Avalons, one millimeter higher"


rmn

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Post by Dave Gale » Thu May 06, 2004 5:54 pm

Ramon, check w/ your chemist!
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Barry Gourley
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crunching noise when rolling

Post by Barry Gourley » Thu May 06, 2004 10:26 pm

I just got a set of biltin bearings and put them in my Avila and..............NO noise YET. I took them for a quick ride down the street. Do Biltin's get faster the more you use um?? I hope so.
Thanks,
Barry

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Post by Alex Luxat » Sun Jun 20, 2004 2:46 pm

IMO this annoying sound (like "cruck cruck cruck") comes when the bearings are not 100% lined up to each other and/or move around (some fractions of a mm) inside the core.
there are way to big tolerances to the standard axles and tolerances of the core to bearing+spacer.
my theory is that if the spacer is a little bit too long (ore the core too short) the slightest lateral pressure (you never go 100% straight) is enough to make the whole wheel/core move along the bearings/spacer.
if you then have tolerances to the 5/16" axles the bearings de-allign, turn, de-allign, turn ... and so forth. thats the crunching noise.

i got rid of it by:
1. upgrading to 8mm axles and
2. fine tuning the spacers of my avalons (shortening them by use of 600 grain wet-sanding)

that you got rid of the noise by the use of biltins speaks for my theory:
since the biltins have a wider inner tube (like +1/2 spacer, +speedring) they keep alligned 90° to the axle. so no crunching sound.

another reason why especially the 3dm wheels tend to "sound crunchy" is simply cause they are the widest wheel, bringing the most torsional pressure to the bearings.

if the sound would come from the formula, any crunching would mean the wheel tearing apart or off the core and THAT you would notice.

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Post by Jeff Goad » Sun Jun 20, 2004 8:09 pm

Ramón Königshausen wrote:"MANX are trimmed Avalons, one millimeter higher"


rmn
wrong
<a href="//www.pavel-skates.com/" target="_blank"><img src="http://i127.photobucket.com/albums/p153 ... nquer2.gif" border="0"></a>

Ramón Königshausen
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Post by Ramón Königshausen » Sun Jun 20, 2004 10:08 pm

I know that now! After I had seen them in Paris...


rmn

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Post by Glenn S » Sun Jun 20, 2004 10:16 pm

Alex,
I think your right in your statements.

Hey nice decks on your site there and that foam core you posted looks killer. Keep us updated on how the new ones come out.

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right and wrong

Post by Martin Siegrist » Mon Jun 21, 2004 1:27 pm

I agree that shitty non 8mm axles and bad spacers can be the reason for noise. BUT: The chrunching noise is also there if you got perfect 8mm axles. The best spacers wouldn't change anything aswell. New wheels don't make any sound on my boards. The problem is the core of the 3dm wheels, which is too soft: it wears out and you got it! The bearing does not sit tight enough in the core. clackclackclackclack

I have absolutely the same noise with my abec 11 92mm flywheels: I used them on my streetluge. I wasn't careful at all whit them, shredded bade roads with cracks and bumps. Now I'm using them on my speedboard, and my trucks have 8mm axles. The spacers are CNC machined. The rim of the flywheel is worn out a little bit and there is this clackclackclackclack-noise.

--> Compare the bearing fit of a new wheel with an old clackclackclackclack-wheel and you will see/hear the difference!

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Post by Ramón Königshausen » Thu Jan 06, 2005 1:31 pm

Jeff Goad wrote:
Ramón Königshausen wrote:"MANX are trimmed Avalons, one millimeter higher"


rmn
wrong





rmn
Last edited by Ramón Königshausen on Mon Oct 24, 2005 8:48 pm, edited 1 time in total.

Dave Gale
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Post by Dave Gale » Thu Jan 06, 2005 3:01 pm

WRONG still!!![/b]
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Ramón Königshausen
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Post by Ramón Königshausen » Thu Jan 06, 2005 4:07 pm

Why?


rmn

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Post by Etienne de Bary » Mon Oct 24, 2005 7:36 pm

Ramón Königshausen wrote:Why?


rmn
off topic ! ;)

Interestingly enough i thought the Manx would be progressive in giant slalom as they have less torsion, but practice does not seem to confirm this theory, does it ? So should we go along discussing this in the Dan managed section or in the Chicken managed section ? ;)

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Post by Ramón Königshausen » Mon Oct 24, 2005 8:51 pm

What?

I say two words: Hot Spot

rmn
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Post by jeff bonny » Thu Jan 05, 2006 3:26 am

Ramón Königshausen wrote:What?

I say two words: Hot Spot

rmn
yep.

David Hicks
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Post by David Hicks » Tue Feb 28, 2006 11:07 pm

ive never gotten this with my avilas 72a if you wanna know

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