I can get the original ball type at my local NAPA - not cheap, but take care of them and they'll likely last longer than the rest of the truck even if you use it daily .... the rollers can work, but they're not an exact dimensional match, and some folks here have reported failures - they're really only recommended if you're putting on disc brakes

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics