Skip to content

▲▲▲ CarryDown

Ball Weight Hand Preference Bowling Style Hide discontinued balls Hide international releases

Ball Finder New Releases Motion Chart Compare Balls

900 Global ABS Brunswick Columbia 300 DV8 Ebonite Elite Epic Hammer KR Strikeforce Motiv Pyramid Radical Roto Grip Storm Swag Track

All Oil Patterns Pattern File Viewer

Blog ⌕ Search

Home/Brands/Roto Grip/Coverstocks/ER1

ER1

Coverstock · 1 ball · all Roto Grip coverstocks

solid

Current

Roto Grip Perfect Gem

Perfect Gem 15lb · RG 2.49 · D 0.057 ✓ USBC ApprovedComing Soon

CarryDown

The current bowling ball catalog — specs, legality, and where to buy. Built for league bowlers.

Ball Finder Oil Patterns Motion Chart New Releases Brands Blog Attributions llms.txt RSS

Affiliate disclosure: CarryDown may earn a commission from qualifying purchases made through retailer links on this site, at no extra cost to you. Ball data is sourced from manufacturer websites and the USBC/PBA approved ball lists — see Attributions for the full list of sources.

© 2026 CarryDown. Brand names, ball names, and logos are trademarks of their respective owners; CarryDown is an independent, brand-neutral catalog and is not affiliated with or endorsed by any manufacturer, the USBC, or the PBA.