I finally broke a spoke on my Trek 930's rear end. I think I overloaded it. It has been trued many times and it is time to replace or lace up a new rim. I have a MTB 26" wheel, 32 spoke hub, and 7speed cassette currently.
I ride pavement mostly with about a mile of loose gravel on the way home. I am looking to be able to handle the 50 lbs capacity of my rear rack with the panniers and myself @ 140. Occasionally I have to ride up a curb thus strength is important. BTW: the TREK 930 is a rigid cro-mo frame with cantilever brakes. I'd like to get a thin rim as I plan on getting the thinner tires for it.
1) What recommendations for a strong commuting rim to re-lace to my existing hub do you have.
2) What complete MTB rear wheel would you recommend.
3) Is it possible to use my 7 speed cassette on a 9 speed hub? (that would open up my options)