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Belt sometimes goes off under the rain

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Belt sometimes goes off under the rain

Postby sunkist-evo3 on Thu Jan 14, 2016 5:23 pm

Hello,

It's rainy today in France!
I notice that sometimes the belt is going off when pedaling hard under the rain.
It goes off at the bottom of the rear free wheel, inside.

I have to stop because it blocks, and it makes some strips of kevlar... so the belt is a little damaged on the side where it went off.

Does someone already had this problem ?

Thanks
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Re: Belt sometimes goes off under the rain

Postby sunkist-evo3 on Fri Jan 15, 2016 8:50 pm

Here are images about the problem :

Image

Image
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Re: Belt sometimes goes off under the rain

Postby Blackstridaaustria on Fri Jan 15, 2016 9:05 pm

Thank you :D

Wonder that you have the plastic freewheel...it's hard to notice wear on these...
Can you tell if the teeth of the belt are looking like so?
Image
I mean - it looks like the teeth are not symmetrical - or is it just an optical illusion?
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Re: Belt sometimes goes off under the rain

Postby sunkist-evo3 on Fri Jan 15, 2016 9:19 pm

Yes it is a plastic one!
Isnt it this one : http://strida.fr/roues-pneus/1670-alloy-freewheel-.html ?
It is named "alloy freewheel" on the website..

About the belt : it is an optical illusion. It is symmetrical :)
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Re: Belt sometimes goes off under the rain

Postby Blackstridaaustria on Fri Jan 15, 2016 9:37 pm

Yes, definitely the new plastic one.
I believe this is better suitable for rain than the Alloy one.
Here are the three generations on one pic:
Image

Ok - thanks for checking the teeth...well, no more ideas at the moment...

I'm curious what you'll find out tomorrow Image
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Re: Belt sometimes goes off under the rain

Postby sunkist-evo3 on Fri Jan 22, 2016 6:00 pm

Hello,

No rain during 4 days in France : no problem.
But today, rain was back.. and the belt went off.

I analysed and I think I understand the problem.
The snubber seems not to be centered, and when it is rainy, some dirty elements from the road are sticking on the belt. Then the belt and these elements touch the snubber more firmly, and the belt goes to the space on the left.

What do you think about that ?

Image

Image

Image
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Re: Belt sometimes goes off under the rain

Postby Blackstridaaustria on Fri Jan 22, 2016 6:46 pm

How can it be that the snubber isn't centered?

Does the bearing itself have that much play or is the lever of the snubber bent?
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Re: Belt sometimes goes off under the rain

Postby Bill Wilby on Fri Jan 22, 2016 8:40 pm

Hi, is the snubber bearing centered on the freewheel?
It looks to me the belt is not centered on the freewheel. A quick check of the Stridas I have in stock most of them the belt is not centered with the belt running closer to the inside edge of the freewheel. It looks to me from your photos your belt is running closer to the outer edge of the freewheel.

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Re: Belt sometimes goes off under the rain

Postby sunkist-evo3 on Sat Jan 23, 2016 8:37 am

Thank you for your answers.
No it is not centered on the freewheel. It is more close to the frame than to the wheel.

Seems the freewheel is not enough close to to frame... :?:

Here are photos of the snubber, nothink to notice, it seems OK.
BUT there was no washer.. is it supposed to be a washer on the bolt ?

Image

Image
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Re: Belt sometimes goes off under the rain

Postby Blackstridaaustria on Sat Jan 23, 2016 9:14 am

Yes it is; the washer sits ususally between bearing and frame - that's the missing distance.

But I don't think that the missing washer is the cause for your issue - there must be another failure, too...

Image

Please don't use a common (wider) washer, except you're sure that it doesnt touch the ball cover.

Edit: Amazing that - at your third pic - it looks like the washer would be present :shock:
Perhaps it's still stuck on the frame ear?
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Re: Belt sometimes goes off under the rain

Postby sunkist-evo3 on Sat Jan 23, 2016 9:37 am

Yes you are right. It is hardly stucked to the frame!
Did not notice. Very hard to remove :)
Will try to remove it.
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Re: Belt sometimes goes off under the rain

Postby Blackstridaaustria on Sat Jan 23, 2016 9:43 am

You may leave the washer at his place.
But due to that it can't be the reason for the missing distance :roll:
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Re: Belt sometimes goes off under the rain

Postby sunkist-evo3 on Sat Jan 23, 2016 10:04 am

Well, I removed the wheel.
Here are some photos :

Image

Image

Image

The axle seems to be OK.
But I noticed something : the freewheel makes some noise when moving it (I send you a Video by email), and there is some play...
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Re: Belt sometimes goes off under the rain

Postby Blackstridaaustria on Sat Jan 23, 2016 6:16 pm

sunkist-evo3 wrote:...and there is some play...


I'd agree if we'd replace "some" with "massive" :shock:

Diagnosing from the video only it's not possible to verify the cause for the massive play,
but I'd think of the following two reasons:

1. Could it be that the outer plastic shells became loose from the inner metal part?

Image

2. We were talking about the seal question already here:
Re: 2014 plastic freewheel interior view

Assumed that there is in fact no seal I'd think that all those little steel balls - which are most likely very close to the gap - are still more or less intact, but their diameter is smaller than it should be.

Image
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Re: Belt sometimes goes off under the rain

Postby sunkist-evo3 on Sun Jan 24, 2016 1:02 pm

Thank you for the explanations Chris.

I had to turn myself into a beast to loosen the freewheel.
But that's done, I succeed.

Image

Here are photos.

3 questions :

1) On the freewheel, I notice there is a gap beetween the ring and the edge :

Image

Maybe it explains that the belt is not centered as it should be.

2) In the wheel itself, I noticed a part which is free to move. Is it normal ?

Image

3) Is it required to tighten the new freewheel as high as the previous one ?

I would say no. :)
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