collapsed wheel beware!

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tb
Posts: 126
Joined: 10 Jan 2007, 12:51pm

collapsed wheel beware!

Postby tb » 16 Aug 2015, 10:48am

I know I like to get my monies worth out of my cycle components but I'll pay more attention in the future!
I thought this rim was in OK condition despite quite a few miles covered and I do clean and check them regular. However pumping up the rear tyre in the hallway, just about 100psi it collapsed and made the loudest bang and here's the results ...
Image Attachments
broken1.jpg
broken1.jpg (75.28 KiB) Viewed 1143 times
broken2.jpg
broken2.jpg (79.69 KiB) Viewed 1143 times
broken3.jpg
broken3.jpg (78.45 KiB) Viewed 1143 times

reohn2
Posts: 37857
Joined: 26 Jun 2009, 8:21pm

Re: collapsed wheel beware!

Postby reohn2 » 16 Aug 2015, 11:04am

Looks like a Mavic MA40.How old is it,what kind of use /mileage?
It looks like a classic worn out braking surface rim failure.
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NATURAL ANKLING
Posts: 11396
Joined: 24 Oct 2012, 10:43pm
Location: English Riviera

Re: collapsed wheel beware!

Postby NATURAL ANKLING » 16 Aug 2015, 11:15am

Hi,
Yep we've all been there.

I now measure all my rims and first check with the finger tells you how concave the brake surface is.

Under a millimetre and fit for the bin.

It varies on what the thickness of rim starts with when new but MTB's and touring rims tend to be thicker :?:
NA Thinks Just End 2 End Return + Bivvy
You'll Still Find Me At The Top Of A Hill
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TrekMad
Posts: 373
Joined: 2 Jun 2015, 10:17am

Re: collapsed wheel beware!

Postby TrekMad » 16 Aug 2015, 11:20am

I think you got your moneys worth there!

tb
Posts: 126
Joined: 10 Jan 2007, 12:51pm

Re: collapsed wheel beware!

Postby tb » 16 Aug 2015, 11:23am

yes, spot on with your observations...Mavic MA40

obviously quite old with lots of commuting miles. I've worn out rims but never managed to collapse one...

Just pleased that it collapsed in my hallway and not on a fast descent :shock:

trieste
Posts: 36
Joined: 10 Jan 2011, 9:47am

Re: collapsed wheel beware!

Postby trieste » 16 Aug 2015, 3:17pm

That doesn't come under my definition of collapsed. The wheel is still circular and the tension in the spokes won't have changed. It does fit under my category of 'buggered'.

SleepyJoe
Posts: 152
Joined: 30 Sep 2010, 12:16pm
Location: North Devon

Re: collapsed wheel beware!

Postby SleepyJoe » 16 Aug 2015, 5:57pm

I hate to admit it, but I have had a front wheel fail in a similar way. I was part way down a 1in 4 hill on Exmoor at the time (heading towards Hunters inn). The whole edge of the rim peeled away on one side. I managed to stop using the rear break only along with lots of swearing! I check my rims a bit more carefully now

mercalia
Posts: 12780
Joined: 22 Sep 2013, 10:03pm
Location: london South

Re: collapsed wheel beware!

Postby mercalia » 16 Aug 2015, 6:37pm

well if u are that thrifty, just remove the metal strip and carry on using it with less wide brake blocks? :wink: