{"product_id":"roto-grip-perfect-gem-bowling-ball","title":"Roto Grip Perfect Gem Bowling Ball","description":"\u003cp\u003eThe Roto Grip Perfect Gem combines the GEM + A.I. asymmetric core with the E-R1 Solid Reactive coverstock. Its 2000-grit Abralon finish provides traction on medium-heavy to heavy oil while the updated core and cover help it travel cleanly through the fronts and continue strongly downlane.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRelease date: October 2, 2026.\u003c\/strong\u003e Orders placed before release are preorders and ship when the ball becomes available.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePin distance and top weight:\u003c\/strong\u003e Enter your preferences in the request box on this page before adding the ball to your cart. We will confirm whether your requested specifications are available.\u003c\/p\u003e\u003ch2\u003eGEM + A.I. core\u003c\/h2\u003e\u003cp\u003eRoto Grip refined the density of the original GEM core and paired it with A.I. Core Technology. The revised asymmetric design has a slightly higher RG for cleaner travel through the front of the lane and an increased differential for strong flare and continuous motion through the pins.\u003c\/p\u003e\u003ch3\u003eCore numbers by weight\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003cth\u003eRG\u003c\/th\u003e\n\u003cth\u003eDifferential\u003c\/th\u003e\n\u003cth\u003ePSA\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e16 lb\u003c\/td\u003e\n\u003ctd\u003e2.49\u003c\/td\u003e\n\u003ctd\u003e0.055\u003c\/td\u003e\n\u003ctd\u003e0.017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15 lb\u003c\/td\u003e\n\u003ctd\u003e2.49\u003c\/td\u003e\n\u003ctd\u003e0.057\u003c\/td\u003e\n\u003ctd\u003e0.017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e14 lb\u003c\/td\u003e\n\u003ctd\u003e2.52\u003c\/td\u003e\n\u003ctd\u003e0.056\u003c\/td\u003e\n\u003ctd\u003e0.016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13 lb\u003c\/td\u003e\n\u003ctd\u003e2.57\u003c\/td\u003e\n\u003ctd\u003e0.032\u003c\/td\u003e\n\u003ctd\u003e0.010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12 lb\u003c\/td\u003e\n\u003ctd\u003e2.59\u003c\/td\u003e\n\u003ctd\u003e0.029\u003c\/td\u003e\n\u003ctd\u003e0.008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCoverstock: E-R1 Solid Reactive\u003c\/li\u003e\n\u003cli\u003eCore: GEM + A.I. asymmetric\u003c\/li\u003e\n\u003cli\u003eFinish: 2000-grit Abralon\u003c\/li\u003e\n\u003cli\u003eColor: Pink \/ Rose \/ Onyx\u003c\/li\u003e\n\u003cli\u003eFlare potential: High\u003c\/li\u003e\n\u003cli\u003eAvailable weights: 12–16 lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Roto Grip","offers":[{"title":"12 lbs - $199.95","offer_id":47934399086753,"sku":"RGBBMRGW12","price":199.95,"currency_code":"USD","in_stock":true},{"title":"13 lbs - $199.95","offer_id":47934399119521,"sku":"RGBBMRGW13","price":199.95,"currency_code":"USD","in_stock":true},{"title":"14 lbs - $199.95","offer_id":47934399152289,"sku":"RGBBMRGW14","price":199.95,"currency_code":"USD","in_stock":true},{"title":"15 lbs - $199.95","offer_id":47934399185057,"sku":"RGBBMRGW15","price":199.95,"currency_code":"USD","in_stock":true},{"title":"16 lbs - $199.95","offer_id":47934399217825,"sku":"RGBBMRGW16","price":199.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/5763\/0113\/files\/roto-grip-perfect-gem-ball.png?v=1790430542","url":"https:\/\/goodbowler.com\/products\/roto-grip-perfect-gem-bowling-ball","provider":"Good Bowler","version":"1.0","type":"link"}