i find tck-80 fr and 130-17" mefo explorers rear are the highest mileage 50/50 tire combo on the market. i'll get 6k plus.
i run 100-18" bridgestone heavy duty (3mm) tubes in the rear.
i balance (key to long life) my wheels with mark parnes balancer
i just changed my bearings and this pit posse affordable bearing puller