Custom J-Cup Liners by Mammoth Upgrades

Pick from 4 different style options

  • Single Color

    Pick one of seven colors

  • American Flag

    Pick your accent color

  • Custom Text

    Pick primary color, text color, orientation, and font. Enter text for each liner

  • Mammoth Upgrades

    Pick your base color and text/logo color

Pick from 7 Different Colors

Available for all Custom J-Cup Liners

Pick from 6 Different Fonts

Available for Custom Text J-Cup Liners

Extra Barbell Protection

All Custom J-Cup Liners add protection around the end of the J-cup. Everybody occasionally fails at racking the bar. Protect your knurling the next time it happens.

How do they compare to typical J-cup Liners?

Feature Mammoth Upgrades Liner Typical Liner
Material Thermoplastic Polyurethane UHMW Plastic
Shore Hardness 68D 60-70D
Failed Rack Protection ✓ ✕
Finish Protection (Cerakote/Zinc) Excellent - Elastic Pressure Distribution Moderate - Rigid Point Loading
Acoustic Profile Impact Dampening - Quieter Impact Reflective - Louder
Barbell Stability Moderate Friction Low Friction
Colors 7 ✕
Text, Designs, and Logos ✓ ✕

Interested in even more customization?

Want your logo, or something crazy on your J-cups? Let’s make it happen. Shoot us an email at support@mammothupgrades.com for a free quote and our design guidelines.