Open Pro's Braking Surface Flat?

Hi All,

Ive recently picked up a 2nd hand pair of Mavic Open Pros (laced to DA 7800 Hubs). These were very reasonably priced and they have covered a reasonable amount of distance.

The rim braking surface is slightly concave, rather then perfectly flat. Is this part of the design or are the rims almost worn out (i expect the latter).

Thanks

All braking surfaces are flat - by the nature of their manufacture.

A concave braking surface is a classic sign of a well worn rim.