Hi, i have a 13+ year old, pretty heavily used mountain bike with Araya RM-20 super hard rims with sovos hubs. the rims are still holding together, but i have to keep tensioning some of the spokes because they "creek" sometimes when i ride, they get a little loose but a half turn usually corrects that (rear wheel). there was rust on the spokes and i cleaned/oiled them to prevent further rust. one spoke already had to be replaced, but i haven't broken a spoke while riding. i have been riding my bike more frequently lately and i'm riding about 50-60 miles a week currently (rides range from 5-20+ miles, several times a week). i'm a fairly big guy (about 257lbs) but i'm in the process of losing 20-30 more. the last thing i want is to be 5+ miles away from home at night and have spokes break on me. here are my questions:
how do i know if there is enough "meat" left on the rim, i don't know how thick the aluminum (sidewall) should be?
do you think it is worth my time to replace the spokes with stainless spokes?
the hub spins freely and there is no play, should i change the bearings as a preventative measure or just grease them?
if i do replace the spokes, i was going to replace each spoke one at a time to make setup and truing easier, is this advisable?
p.s. i have various tools and automotive/mechanical knowledge.