As far as features and use the two trailer wheels part # AM20363 and # AM20352 are the same with basically just different finishes. The holes on the silver wheel are round whereas the holes of the white wheel are D shaped. view full answer...
Self-adjusting brake assemblies are the way to go like with the # AKEBRK-7-SA which do fit your 7k Dexter axles. The only real reason to go with manual adjust is really just cost. At one point the self adjusting models were much more expensive but now the cost is close enough that it's an easier choice to go with self adjusting. view full answer...