{"merchant":{"slug":"bowlersmart","name":"BowlersMart","domain":"www.bowlersmart.com"},"id":"810471","sku":"HAM-BLKPRLTHN","gtin":null,"name":"Hammer Black Pearl Urethane Bowling Ball","brand":"Hammer","categories":[{"name":"Bowling Balls","slug":"bowling-balls"},{"name":"Bowling Balls for Straight Bowlers","slug":"straight-bowler-bowling-balls"},{"name":"Bowling Brand","slug":"brands"},{"name":"Dry Lane Bowling Balls","slug":"dry-lane-bowling-balls"},{"name":"Hammer","slug":"hammer"},{"name":"Hammer Bowling Balls","slug":"hammer-bowling-balls"},{"name":"Mid-Performance Bowling Balls","slug":"mid-performance-bowling-balls"},{"name":"MRP/MAP","slug":"mrp-map"},{"name":"Symmetrical Core Bowling Balls","slug":"symmetrical-core-bowling-balls"},{"name":"Urethane Bowling Balls","slug":"urethane-bowling-balls"}],"buy_url":"https://www.bowlersmart.com/product/hammer-black-pearl-urethane-bowling-ball/","pages":{"html":"https://ittems.com/bowlersmart/p/hammer-black-pearl-urethane-bowling-ball","md":"https://ittems.com/bowlersmart/p/hammer-black-pearl-urethane-bowling-ball.md","json":"https://ittems.com/bowlersmart/p/hammer-black-pearl-urethane-bowling-ball.json"},"price":{"min":149.95,"max":149.95,"currency":"USD"},"availability":"instock","checked_at":"2026-10-15T21:14:34.804963+00:00","source_updated_at":"2026-10-15T20:29:14+00:00","summary":"What should I know about the Black Pearl Urethane? High-RG, low-differential symmetric LED Core for minimal flare Harder Urethane Pearl 78D cover for predictable, controllable motion Urethane control for dry, short, and broken-down lanes","specs":[{"key":"Brand","value":"Hammer"},{"key":"Bowling Ball Coverstock Type","value":"Urethane"},{"key":"Bowling Ball Cover Name","value":"Urethane Pearl 78D"},{"key":"Bowling Ball Core Shape","value":"Symmetrical Core"},{"key":"Bowling Ball Core Name","value":"Hammer LED Core"},{"key":"Radius of Gyration: RG (15LB)","value":"2.65"},{"key":"Differential: Diff (15LB)","value":".015"},{"key":"Flare Potential","value":"1 - 2 Inches"},{"key":"Surface Finish","value":"500 Grit"},{"key":"Preferred Lane Conditions","value":"Dry - Medium Oil"},{"key":"Bowling Ball Color","value":"Black Pearl"},{"key":"Ball Performance Level","value":"Performance Bowling Balls"},{"key":"LT Product Category","value":"Bowling Balls"},{"key":"LT Product Subcategory","value":"Mid-Performance Bowling Balls"},{"key":"Release Date","value":"March 2024"}],"variants":[{"sku":"HAM6010812716","gtin":"840315613737","label":"16LB","price":149.95,"stock":20,"options":{"Ball Weight":"16LB"},"availability":"instock","regular_price":229.95},{"sku":"HAM6010812715","gtin":"840315613720","label":"15LB","price":149.95,"stock":11,"options":{"Ball Weight":"15LB"},"availability":"instock","regular_price":229.95},{"sku":"HAM6010812714","gtin":"840315613713","label":"14LB","price":149.95,"stock":39,"options":{"Ball Weight":"14LB"},"availability":"instock","regular_price":229.95},{"sku":"HAM6010812713","gtin":"840315613706","label":"13LB","price":149.95,"stock":80,"options":{"Ball Weight":"13LB"},"availability":"instock","regular_price":229.95},{"sku":"HAM6010812712","gtin":"840315613690","label":"12LB","price":149.95,"stock":23,"options":{"Ball Weight":"12LB"},"availability":"instock","regular_price":229.95}],"images":[{"alt":"hammer-black-pearl-urethane-bowling-ball-800-jan2024","url":"https://www.bowlersmart.com/wp-content/uploads/2024/01/hammer-black-pearl-urethane-bowling-ball-800-jan2024.jpg"},{"alt":"Black_Pearl_Urethane_78D_Core","url":"https://www.bowlersmart.com/wp-content/uploads/2024/01/Black_Pearl_Urethane_78D_14_lb_Core_1600x1600.png"},{"alt":"hammer-black-pearl-urethane-bowling-ball2-800-jan2024","url":"https://www.bowlersmart.com/wp-content/uploads/2024/01/hammer-black-pearl-urethane-bowling-ball2-800-jan2024.jpg"},{"alt":"2dafb075-851a-4fa2-a923-f6d5ca96004e","url":"https://www.bowlersmart.com/wp-content/uploads/2021/05/2dafb075-851a-4fa2-a923-f6d5ca96004e.png"}],"release_date":"March 2024","description":"Controlled, Predictable Urethane Motion\n\nAbout the Black Pearl Urethane\n\nThe Hammer Black Pearl Urethane is a control specialist built on Hammer's harder 78D urethane. It pairs the symmetric LED Core with the Urethane Pearl 78D coverstock, delivering a smooth, predictable, low-flare motion for dry to medium oil and short patterns. It is the ball you reach for when control matters more than hook.\n\nThe Black Pearl Urethane reads the lane gently and predictably. The urethane cover generates less friction and stores less energy than reactive resin, so the ball holds a controlled line where a strong reactive ball would over-hook. The 78D urethane is a harder, more controllable formulation, ideal for short patterns, broken-down lanes, and precise spare and control shots.\n\nUnderstanding the Hammer LED Core and Hammer Urethane Pearl 78D\n\nHammer built the Black Pearl Urethane for controlled, predictable urethane motion on dry to medium oil. Specifically, the symmetric LED Core posts a 2.650 RG and a low .015 differential, numbers that produce minimal flare and a smooth, on-line motion, while the harder Urethane Pearl 78D cover at a 500 Siaair Micro Pad finish reads the lane gently rather than snapping. As a result, it delivers a controlled, repeatable shape on short and worn conditions. The per-weight specifications are listed below.\n\nA High-RG, Low-Differential Symmetric Core for Minimal Flare\n\nAt the heart of the Black Pearl Urethane is the symmetric LED Core. At 15 lb it measures a high 2.650 RG and a low .015 differential, numbers that produce minimal track flare and a smooth, controlled motion. The high RG and low differential keep the reaction even and predictable, exactly what a control ball needs.\n\nThat low-flare, on-line behavior is what gives the Black Pearl Urethane its controlled feel. As a symmetric core, it reads the lane the same way shot after shot, so the ball holds its line through dry and short patterns rather than over-reacting at the breakpoint.\n\nA Harder 78D Urethane Cover for Predictable Control\n\nThe Black Pearl Urethane wraps that core in Hammer's Urethane Pearl 78D coverstock at a 500 Siaair Micro Pad finish. Urethane generates less friction than reactive resin, so the ball reads the lane gently and holds a controlled line instead of snapping hard at the breakpoint. The harder 78D formulation adds even more control and length.\n\nThat smooth, even reaction is exactly what makes the Black Pearl Urethane a control weapon. On short patterns and broken-down lanes, it gets a predictable read where a strong reactive ball would jump. Take the surface down for a touch more grip, or smooth it up for a bit more length, with surface changes done at your pro shop.\n\nBlack Pearl Urethane Specs\n\nRG and differential vary by weight. Specifications provided by the manufacturer.\n\nWho This Ball Is Right For\n\n✓Control Players: A smooth, on-line urethane reaction for dry, short, and broken-down lanes\n\n✓Short-Pattern Bowlers: Minimal flare and a predictable read for short patterns where a reactive ball over-reacts\n\n✓Urethane Users: A harder 78D urethane that holds its line on demanding conditions but stays tunable\n\n✓Arsenal Builders: A specialty control piece for the driest and shortest conditions, when angle is the enemy\n\nGood to Know Before You Buy\n\n·Control over raw hook: The lower differential means moderate total hook. For maximum board coverage on heavy oil, step up to stronger equipment.\n\n·Ships sanded for traction: The 500 Siaair Micro Pad finish is built to grip in oil. Polish it for more length when the volume drops.\n\n·Colors vary: Actual colors vary somewhat from the photos shown; no two balls come out of the mold exactly alike.\n\n·Tiny pit holes are normal: A few tiny pit holes in the coverstock are a normal part of the manufacturing process.\n\n·Sold undrilled: Ships without finger holes, so it can be fitted to your hand and span.\n\nBowlersMart Tips: Where the Black Pearl Urethane Fits in Your Hammer Arsenal\n\nWhere It Fits in Your Arsenal\n\nIn the Hammer lineup, the Black Pearl Urethane is a specialty control piece for dry, short, and broken-down lanes. Where your reactive balls hook sharply, the 78D urethane reads smoothly and holds its line, so it shines when the pattern is short or the lanes have given out. It is the ball you reach for when control matters more than hook.\n\nSurface Adjustments\n\nThe 500 Siaair finish gives the Black Pearl Urethane its controlled, urethane read. Take it lower for a touch more grip on the driest lanes, or smooth it up for a bit more length. Have surface changes done at your pro shop for an even, consistent finish.\n\nCoverstock Care\n\nWipe the urethane cover with an approved ball cleaner after every session. Keeping the cover fresh preserves the smooth, predictable read that makes the Black Pearl Urethane such a dependable control piece.\n\nEarn points on every Hammer purchase through the Striking Rewards loyalty program. Every ball you add to your arsenal builds toward your next reward.\n\nShop With Confidence at BowlersMart\n\nThe Hammer Black Pearl Urethane Bowling Ball ships free with no minimum purchase and is backed by our 60-day return policy. As an authorized Hammer dealer, every ball is genuine and covered by the full one-year Hammer warranty. Place your order before 2 PM EST and it ships the same day.\n\nWeight\nRadius of Gyration (RG)\nDifferential\n\n16 lbs\n2.610\n.030\n\n15 lbs\n2.650\n.015\n\n14 lbs\n2.680\n.013\n\n13 lbs\n2.631\n.020\n\n12 lbs\n2.628\n.026","policies":[{"text":"Free ground shipping on US orders, no minimum, 48 contiguous states and military APO/FPO. To Alaska, Hawaii, Puerto Rico and Guam bowling balls ship for $24.95 per ball, most other items free; oversized roller bags cost extra there. International orders pay the rate shown at checkout, duties paid locally.","title":"Shipping","source_url":"https://www.bowlersmart.com/shipping-information/"},{"text":"In-stock items ordered by 2PM EST Monday to Friday ship the same day, later orders the next business day. Carriers USPS, UPS, FedEx. Standard delivery 3 to 7 business days; expedited options at checkout.","title":"Processing and delivery","source_url":"https://www.bowlersmart.com/shipping-information/"},{"text":"60 days from delivery for US customers on new, unused items in original packaging, free prepaid return labels. Drilled bowling balls cannot be returned or exchanged. Shoes must have been tried on a clean, dry surface. Manufacturing defects and shipping damage go through the defect claim process.","title":"Returns","source_url":"https://www.bowlersmart.com/return-exchange-policy/"},{"text":"Credit and debit cards, PayPal, Apple Pay, Google Pay, Venmo, Amazon Pay, and buy now pay later through Affirm, Afterpay and Klarna.","title":"Payment","source_url":"https://www.bowlersmart.com/payment-options/"},{"text":"Pro shops inside bowling centers in 10 US states fit, drill and service equipment; a ball bought online can be drilled there.","title":"Pro shops","source_url":"https://www.bowlersmart.com/locations/"},{"text":"www.bowlersmart.com is the only website of BowlersMart. Lookalike domains are fraudulent.","title":"Identity","source_url":"https://www.bowlersmart.com/resources/scam-awareness/"}]}