Athena® - Selectorized Weight Stack Upgrade

$81.24 ~~$162.49~~ In stock

The Athena® Selectorized Weight Stack Upgrade from REP Fitness enhances your home gym by adding a smooth selectorized weight stack, compatible with REP rack series 4000 and 5000.

Available in Single-Side or Dual-Side configurations
Designed for use with REP Fitness 4000 and 5000 series racks
Product requires assembly upon receipt

Customer Reviews (5.0 / 5 · 3 reviews)

Olivia K. ★★★★★ Aug 17, 2026

Was nervous about the install on my 4000 series rack, but the brackets lined up perfectly and it took about an hour. The weight stack itself feels rock solid with zero clanking, and switching pins mid-set is way faster than messing with plates.

Riley ★★★★★ Aug 16, 2026

The stack glides so smoothly it honestly makes my old plate changes feel prehistoric. Setup took a bit of patience with the rack rails, but the resistance curve is buttery and the drop-in fit for my 5000 series was spot on.

Leo ★★★★★ Jul 24, 2026

Installed the weight stack upgrade this weekend and was surprised how smoothly it glides compared to the old setup. The selector pin feels solid and clicks into place exactly where I need it. Really glad I went with this instead of trying to rig something myself.