{"merchant":{"slug":"bowlersmart","name":"BowlersMart","domain":"www.bowlersmart.com"},"id":"1027719","sku":"HAM-3D-OFF-ASA","gtin":null,"name":"Hammer 3-D Offset Assault Bowling Ball","brand":"Hammer","categories":[{"name":"Asymmetrical Core Bowling Balls","slug":"asymmetrical-core-bowling-balls"},{"name":"Bowling Ball Deals","slug":"bowling-ball-deals"},{"name":"Bowling Balls","slug":"bowling-balls"},{"name":"Bowling Balls for Two-Handed Bowlers","slug":"two-handed-bowling-balls"},{"name":"Bowling Brand","slug":"brands"},{"name":"Bowling Deals","slug":"bowling-deals"},{"name":"Hammer","slug":"hammer"},{"name":"Hammer Bowling Balls","slug":"hammer-bowling-balls"},{"name":"Heavy Oil Bowling Balls","slug":"heavy-oil-bowling-balls"},{"name":"High Performance Bowling Balls","slug":"high-performance-bowling-balls"},{"name":"Hybrid Reactive Bowling Balls","slug":"hybrid-reactive-bowling-balls"}],"buy_url":"https://www.bowlersmart.com/product/hammer-3-d-offset-assault-bowling-ball/","pages":{"html":"https://ittems.com/bowlersmart/p/hammer-3-d-offset-assault-bowling-ball","md":"https://ittems.com/bowlersmart/p/hammer-3-d-offset-assault-bowling-ball.md","json":"https://ittems.com/bowlersmart/p/hammer-3-d-offset-assault-bowling-ball.json"},"price":{"min":144.95,"max":144.95,"currency":"USD"},"availability":"instock","checked_at":"2026-10-15T17:34:10.676878+00:00","source_updated_at":"2026-10-08T04:30:21+00:00","summary":"What should I know about the 3-D Offset Assault? Strong-differential High Rev Offset Core with a low intermediate differential for a smooth, even motion HK22 Cohesion Hybrid cover at a 2000-grit finish for a firm, controllable read A strong but controllable asymmetric for medium to heavy oil","specs":[{"key":"Brand","value":"Hammer"},{"key":"Bowling Ball Core Shape","value":"Asymmetrical Core"},{"key":"Bowling Ball Core Name","value":"Hammer High Rev Offset Core"},{"key":"Bowling Ball Coverstock Type","value":"Hybrid Reactive"},{"key":"Bowling Ball Cover Name","value":"Hammer HK22 Cohesion Hybrid Reactive"},{"key":"Radius of Gyration: RG (15LB)","value":"2.48"},{"key":"Differential: Diff (15LB)","value":".053"},{"key":"Mass Bias Strength","value":".008"},{"key":"Flare Potential","value":"4 - 5 Inches"},{"key":"Surface Finish","value":"2000 Grit"},{"key":"Preferred Lane Conditions","value":"Medium - Heavy Oil"},{"key":"Bowling Ball Color","value":"Red"},{"key":"Ball Performance Level","value":"Hammer High Performance Bowling Balls, High Performance Bowling Balls"},{"key":"Release Date","value":"January 2025"}],"variants":[{"sku":"HAM-3D-OFF-ASA-15","gtin":"840315618466","label":"15LB","price":144.95,"stock":6,"options":{"Ball Weight":"15LB"},"availability":"instock","regular_price":289.95}],"images":[{"alt":"hammer offset 3d assault bowling ball","url":"https://www.bowlersmart.com/wp-content/uploads/2025/01/3-D_Offset_Assault_720x720.png"},{"alt":"Hammer 3-D Offset Bowling Ball Core","url":"https://www.bowlersmart.com/wp-content/uploads/2022/01/VupkOHu4.png"},{"alt":"3-D_Offset_Attack_Core_13-12_1920x1980_952c83e9-8f9d-4b07-8951-3230a93e788a_540x","url":"https://www.bowlersmart.com/wp-content/uploads/2023/01/3-D_Offset_Attack_Core_13-12_1920x1980_952c83e9-8f9d-4b07-8951-3230a93e788a_540x.webp"}],"release_date":"January 2025","description":"A Strong, Controllable Asymmetric for Heavy Oil\n\nAbout the 3-D Offset Assault\n\nThe Hammer 3-D Offset Assault is a strong but controllable asymmetric built for medium to heavy oil. It pairs the asymmetric High Rev Offset Core with the HK22 Cohesion Hybrid coverstock, delivering big flare with a smooth, controllable read. Its lower intermediate differential gives it a continuous, even motion rather than a sharp, hard-to-read backend.\n\nThe 3-D Offset Assault pairs strong flare with a controllable shape. The High Rev Offset core has a strong differential but a low intermediate differential, so it produces big flare with a smooth, predictable breakpoint, while the HK22 Cohesion Hybrid cover reads the midlane firmly. The result is a strong, even asymmetric that rewards revs with control.\n\nUnderstanding the Hammer High Rev Offset Core and Hammer HK22 Cohesion Hybrid Reactive\n\nHammer built the 3-D Offset Assault for strong but controllable motion on medium to heavy oil. Specifically, the asymmetric High Rev Offset Core posts a 2.489 RG, a strong .053 differential, and a low .008 intermediate differential, numbers that produce high flare with a smooth, continuous breakpoint, while the HK22 Cohesion Hybrid cover at a 2000-grit finish reads the midlane firmly. As a result, it gives you strong flare with a controllable, even motion. The per-weight specifications are listed below.\n\nA Strong-Differential Asymmetric Core With a Smooth, Even Motion\n\nAt the heart of the 3-D Offset Assault is the asymmetric High Rev Offset Core. At 15 lb it measures a 2.489 RG, a strong .053 differential, and a low .008 intermediate differential, a combination that produces high track flare with a smooth, continuous breakpoint. The strong differential gives it big flare while the low intermediate differential keeps the motion even and controllable.\n\nBecause the core is asymmetric, layout still has an influence on the reaction, so your pro shop can tune it to your game. That mix of strong flare and a controllable, even shape is what makes the 3-D Offset Assault reward higher revs without an erratic backend.\n\nAn HK22 Cohesion Hybrid for a Firm, Controllable Read\n\nThe 3-D Offset Assault wraps that core in Hammer's HK22 Cohesion Hybrid Reactive coverstock at a 2000-grit finish. As a hybrid, the cover blends solid and pearl material, so it reads the midlane firmly like a solid while keeping enough cleanliness to drive rather than roll out, ideal for medium to heavy oil.\n\nPaired with the strong, even High Rev Offset core, the HK22 Cohesion Hybrid gives the 3-D Offset Assault a firm, controllable read with big flare. Leave it at the 2000-grit box finish for medium to heavy oil, take the surface lower for more traction, or polish it up for more length as the lanes dry.\n\n3-D Offset Assault Specs\n\nRG and differential vary by weight. Specifications provided by the manufacturer.\n\nWho This Ball Is Right For\n\n✓Higher-Rev Bowlers: Big flare with a smooth, even motion that rewards revs without an erratic backend\n\n✓Tournament Players: A strong but controllable asymmetric for medium to heavy oil\n\n✓Control Players: Strong flare with a low intermediate differential for a continuous, predictable shape\n\n✓Arsenal Builders: A strong, even asymmetric for the medium-to-heavy part of the bag\n\nGood to Know Before You Buy\n\n·Strong, aggressive motion: This is a high-flare piece built for traction. If you want a controlled, lower-hook reaction, a lower-differential ball will suit you better.\n\n·Ships sanded for traction: The 2000 Grit finish is built to grip in oil. Polish it for more length when the volume drops.\n\n·Asymmetric layout sensitivity: Layout choices shift the reaction more than on a symmetric ball. Match the pin and mass bias to your game with your pro shop.\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 3-D Offset Assault Fits in Your Hammer Arsenal\n\nWhere It Fits in Your Arsenal\n\nIn the Hammer lineup, the 3-D Offset Assault is the strong, controllable asymmetric with a smooth, even motion. Its low intermediate differential makes it read more continuously than the sharper Black Widow and Effect pieces, so it is a strong option for higher-rev players who want flare with control on medium to heavy oil.\n\nSurface Adjustments\n\nThe 2000-grit finish gives the 3-D Offset Assault its firm, controllable read. Take the surface lower for more traction on heavier oil, or polish it up for more length as the lanes dry. Have surface changes done at your pro shop for an even, consistent finish.\n\nCoverstock Care\n\nWipe the HK22 Cohesion cover with an approved reactive ball cleaner after every session, and deep clean it periodically. Keeping the cover fresh preserves the firm, controllable read that defines the 3-D Offset Assault.\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 3-D Offset Assault 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\nMass Bias\n\n16 lbs\n2.501\n.046\n.007\n\n15 lbs\n2.489\n.053\n.008\n\n14 lbs\n2.505\n.053\n.008\n\n13 lbs\n2.589\n.043\n.011\n\n12 lbs\n2.612\n.043\n.011","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/"}]}