Rim thickness - worn out?

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Mick F
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Re: Rim thickness - worn out?

Postby Mick F » 16 Oct 2019, 9:37am

Thanks, but no thanks, NA!

Thanks Mig.
Good links .................. but we don't own a Peugeot these days. :wink:

--------------------------------------

The question remains though, can I fit a 36h rim on a 28h hub?
If so, I'm onto a winner.
Mick F. Cornwall

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NATURAL ANKLING
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Re: Rim thickness - worn out?

Postby NATURAL ANKLING » 16 Oct 2019, 9:59am

Hi,
I didn't include any :-)'s but you knew I was only joking/ Well I wasn't but you can take it as I was.
You could always write a book on customising Moultons, In brackets (includes accounts/was it worth it) :mrgreen:
If You Don't Try You Don't Do.....Don't Do You Don't Get...I'm Still Trying....Well Very..
You'll Find Me At The Top Of A Hill...............Somewhere...After Dark..

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Mick F
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Re: Rim thickness - worn out?

Postby Mick F » 16 Oct 2019, 10:35am

Been in the workshop doing a spot of tidying. Much more to do though! :oops:
I could write a book on customising MY Moulton quite easily ........... and also a Raleigh Chopper. :wink:

Found the 36h 12" rim that I used on the front of the Chopper. I fitted a roller brake but the only hub I could use was 36h. Chopper had 28h if my memory serves me correctly.
I bought the 12" 36h and some spokes to build a front wheel. Worked wonderfully with a brilliantly strong brake. The roller brake and hub came off the mixte ......... since re-instated of course, and the Chopper put back to original and sold.

Meanwhile I still have the 12" 36h rim and spokes .............

I happen to have a front 28h Miche hub, and as I still have the spokes from the Chopper wheel, I could try building a 12" wheel with a 36h rim and 28h hub. Experiment only to see if the idea could possibly work.

What's the chances of doing this?
I see that doing it the other way round would work ........... 36h hub and 28h rim as the spare holes wouldn't be far apart in the hub and only four per side, but with a 36h rim and 28h hub, the eight gaps on the wheel rim could be problematical maybe.

Comments anyone?
Mick F. Cornwall



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Mick F
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Re: Rim thickness - worn out?

Postby Mick F » 16 Oct 2019, 10:46am

Mick F wrote:I'm going to drop SJS Cycles a question about the original thickness of their CR18 rims.
See if they know! :D
Just got an email from SJS with a link to my question.

Seems like they were 3mm. :shock:

https://www.sjscycles.co.uk/rims-tape/2 ... im-silver/
Scroll down to Questions & Answers.
Original Thickness?

If they were 3mm, the rear one has lost 1.9mm, that's nearly half a millimetre per 1000miles.
Looks like I only have a few hundred miles left before rim collapse .......................... or is that what SJS actually want?
Do they want to sell more rims?
............. or am I being cynical?
Mick F. Cornwall


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Mick F
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Re: Rim thickness - worn out?

Postby Mick F » 16 Oct 2019, 10:49am

Thanks!
Matching in 36h?

Sorry, but it would be nice if they matched, though you are very kind in searching for me! Keep at it!
Mick F. Cornwall

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Re: Rim thickness - worn out?

Postby rjb » 16 Oct 2019, 10:53am

If campag can do it I think you could too. 36 hole rim, 28 hole hub. Shouldn't be a problem not as extremes these. :wink:
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Re: Rim thickness - worn out?

Postby mig » 16 Oct 2019, 10:53am

got a drill ain't ya? :wink:

i'll have a look in a bit.....

Brucey
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Re: Rim thickness - worn out?

Postby Brucey » 16 Oct 2019, 11:08am

you can build a 36h rim onto a 28h hub in two different ways

1) Drill extra holes in the flange (large flanges only)

2) make 'endless' spokes , i.e. which are threaded for nipples both ends and pass through the hub flange.


I've done both and both are a lot of work, using weird spoke lengths. 2) is only possible if you can get 14G wire that is long enough to make the spoke; if re-using standard spokes then ~310mm is about your lot, which means that this approach works OK on 16" or smaller rims, but for larger wheels you need to source special wire.

[edit; the one thing I definitely don't recommend is having just 28 spokes in a 36 drilled rim that isn't designed to have odd-spaced spoking. Most rims are not stiff enough that they won't end up thrupenny bit shaped.]

cheers
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Mick F
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Re: Rim thickness - worn out?

Postby Mick F » 16 Oct 2019, 12:13pm

Mixture of two-cross and one-cross?

It's only a small front wheel. Plenty strength in a 406 rim and very easy to true normally, in fact there's hardly any truing required, just getting the dish right.

I'm going to have a play with my 12" rim later .......... or tomorrow.
Mick F. Cornwall


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Re: Rim thickness - worn out?

Postby JohnW » 16 Oct 2019, 12:24pm

ElCani wrote:Looks like the crack in my rim was already present, hidden under rim tape. Certainly doesn't look fresh when viewed from the inside, plenty of corrosion around. I've never used these wheels, despite owning them for about five years! Oh well.

From the photo I find it difficult to be sure whether wear or an inherent defect have caused what appears to be a crack.
If the latter - it's frightening.

Name that rim!

IMG_7369.jpg - posted by ElCani on 16th Oct - doesn't reproduce!

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Mick F
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Re: Rim thickness - worn out?

Postby Mick F » 16 Oct 2019, 1:47pm

Drag onto desktop, and copy onto a post.
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Mick F. Cornwall