Custom J-Cup Liners by Mammoth Upgrades

Pick from a variety of customization options

  • Single Color

    Pick one color for a clean simple look.

  • Preset Options

    Choose from one of our ready to order designs

  • Custom Text

    Add your own text, slogan, name, or identifier

  • Custom Logo

    Upload your own logo for maximum customization

Before
After

More than a replacement liner

Mammoth J-Cup Liners do more than replace worn-out liner material. Extended coverage beneath the front lip helps keep your barbell's knurling from contacting bare steel when the bar contacts the front of the J-cup while racking.

How do they compare?

Feature Mammoth Upgrades TPU Liner Standard UMHW Liners*
Material Strength 68D Rigid Plastic
Impact Response Flexible Ridged
Front-lip coverage ✓ ✕
Color Options ✓ ✕
Customization ✓ ✕

*Stock liner specifications vary by manufacturer. UMHW characteristics represent industry averages.

Select your J‑Cup