Now Available
Rack Adapter Blocks
Got a puny rack but want to run the attachments built for beefy 3x3 uprights? We did too, so we created Rack Adapter Blocks to bridge that gap.
Free shipping on 2+ set orders · US only · Details
Build Your Set
Collection
$124.99
3 Sets (6 blocks) — one of each color
Freedom — 3 Sets (6 blocks)
Red, White, Blue
Freedom collection · each set = 2 blocks
$124.99
Built to fit what you already own
Default spec adapts 2×2" racks to 3×3" attachment compatibility. The shim is designed slightly over 1" for a snug, zero-play fit — tight enough to eliminate wobble, easy enough to slide on and off.
Shim (adapter portion)
72 × 26.5 × 22.75mm
2.8" × 1.0" × 0.9"
Lip (retention shelf)
83.6 × 39.4 × 10mm
3.3" × 1.6" × 0.4"
Total height
32.7mm (1.3")
Weight per block
70g (2.5oz) · 140g per pair
Need a custom size?
To get a perfect fit, measure with calipers (in mm if possible):
- Your rack upright thickness on the side the attachment mounts
- The gap between your rack and the inside of the attachment when snug against the upright — that's the shim depth we need
- The upright width for the block width
- The attachment thickness at the lip if you want a flush fit
Send us those numbers via contact and we'll produce a custom-fit version.
Why ours are different
Built for real training
Tested under load on safety bars and J-cups — these aren't decorative shims.
Fast setup, easy storage
Built-in magnets snap the pair together for easy storage and transport — and help secure positioning on the rack during use.
Plant-based, not petroleum
Made from renewable, plant-derived materials — no petroleum-based plastics. Engineered for your rack, easier on the planet.
Usage note: Rack Adapter Blocks are designed to allow rack implements to fit snug on smaller-depth racks. Not designed to withstand direct impact or drops. Use as directed for fitment and positioning.