A lesson learned

[argonsixar]

Yesterday morning, just left home and after 200 yards , this happened. It reminds me to check rim wear on my older wheels from now on !

 

[poweredbypies]

Ooops :shock: bet that came as a bit of a shock.

 

[Lazarus]

wow :shock: A wienmann concave too ? I shall check my own batches of ye oldies now.

 

[argonsixar]

It was a Mavic MA3.
I strippped it down last night to recover the hub and looking at it naked, the rim looks generally pretty good except for that 20 cm of curly wurly shaped sidewall now. There was no obvious warning sign....

 

[nammonk]

Happily this has only ever happened to me once, when inflating a tyre. Made a heck of a noise. That was a Rigida rim (old box section), and not particularly worn. As you found, there was no obvious indication that this would happen. I've sworn of Rigida ever since (no great loss), but maybe I've been unfair to them.
Nick

 

[jonnyboy666]

road rims tend to do this with less wear than an mtb rim because the high pressure in the tyre puts more force on the rim.

you're lucky though, this happened to ex 12 hour tt holder glenn longland and he came off and broke his hip.

 

[argonsixar]

Stripped down view

Slightly better view of the extent.

 

[poweredbypies]

Bet that definatley called for a change of underwear when that went.

 

[Lazarus]

MA3 it is buddy, looked concave from the other angle. I'm off MA3's now, not that I have any, but my MA40's are 27years old and have done too many thousands of miles to count, but still going strong, just checked

Later buddy, Laz.