KINGSBOX ROLLER J-CUPS

We have a new Olympic barbell holder for the Royal series: Roller J Cups. They are designed similarly to the classic, well-known holders but have a roller made of technical plastics in the central part that also allows horizontal movement of the barbell. The advantage of the roller is that before the next lift, the barbell can be re-centered and re-balanced. With classic J cup holders, moving the barbell would damage the plastic on the holders.

What is a Rack Attachment?

What rack attachments are

Rack attachments bolt or pin onto a power rack or squat stand to expand what it can do — J-cups and safety arms/straps (the essentials), plus dip bars, a landmine, a lat pulldown, weight-plate storage, roller J-cups, and more. They turn a rack into a whole gym.

Compatibility comes first

An attachment must match your rack’s upright size (2x2, 2x3, or 3x3) and hole pattern/hardware (e.g. 5/8-in vs 1-in holes, Westside spacing). Attachments are usually series-specific — a Monster Lite J-cup won’t fit an Echo upright — so confirm the fit before buying.

How it compares