Originally Posted by
electrizer
Hello!
I was just having a look at my Mavic A719's and whereas the breaking surface (I use v-brakes) is ok in the front, in the back wheel it's slightly indented indicating significant wear. This year I'm planning to go on a 1500+ km tour, would you say I need new rims? Having said this, would you think switching to discs is a good thing to do?
Best
Przemek
Mavic 719's have an internal rather than external wear indicator. When the rim is finished a small hole will appear in the side of the rim where material has been machined out from the inside.
Aside from replacing the rim outright, the best alternative is to estimate how many kilometers are already on the rims to decide if another 1,500 is significant enough for concern. Braking wear is determined by driving habits and terrain. For example I wear my front rim more than the rear but get good milage out of both because most of my driving is on flat terrain with a touring rig.
If a straightt edge across the rim shows 1mm wear you're really close to the end.