T-3 or X-3 Series Rack Mounted Leg Curl and Extension

Crush leg day with this rack-mounted leg curl and extension attachment. Made to target your quads and hamstrings with standing curls and seated extensions, loading up to 275 LB of Olympic plates for serious strength gains. The quick-mount J-hooks lock securely inside your rack for a solid, space-saving setup, while the padded seat and adjustable roller make switching between movements quick and comfortable. Ergonomic grip handles keep you in control through every rep, and the smooth, curved leg roller follows your natural movement for a comfortable, powerful workout. Built tough and fully compatible with T-3 and X-3 Series power racks.

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