{"merchant":{"slug":"bowlersmart","name":"BowlersMart","domain":"www.bowlersmart.com"},"id":"360249","sku":"Radical-Spy","gtin":null,"name":"Radical The Spy Bowling Ball","brand":"Radical","categories":[{"name":"Asymmetrical Core Bowling Balls","slug":"asymmetrical-core-bowling-balls"},{"name":"Bowling Balls","slug":"bowling-balls"},{"name":"Bowling Balls for Straight Bowlers","slug":"straight-bowler-bowling-balls"},{"name":"Bowling Deals","slug":"bowling-deals"},{"name":"Entry Level Bowling Balls","slug":"entry-level-bowling-balls"},{"name":"Radical","slug":"radical"},{"name":"Radical Bowling Balls","slug":"radical-bowling-balls"}],"buy_url":"https://www.bowlersmart.com/product/radical-spy-bowling-ball/","pages":{"html":"https://ittems.com/bowlersmart/p/radical-spy-bowling-ball","md":"https://ittems.com/bowlersmart/p/radical-spy-bowling-ball.md","json":"https://ittems.com/bowlersmart/p/radical-spy-bowling-ball.json"},"price":{"min":104.95,"max":104.95,"currency":"USD"},"availability":"instock","checked_at":"2026-10-15T17:34:10.676878+00:00","source_updated_at":"2026-10-15T07:20:01+00:00","summary":"What should I know about the The Spy? Asymmetric Spy Core with DynamiCore for a defined, controllable move Textured Polyester cover for control with a touch of real hook A unique specialty ball that bridges a plastic spare and a controllable reactive","specs":[{"key":"Brand","value":"Radical"},{"key":"Bowling Ball Core Shape","value":"Asymmetrical Core"},{"key":"Bowling Ball Core Name","value":"Radical Spy Core"},{"key":"Bowling Ball Coverstock Type","value":"Plastic"},{"key":"Bowling Ball Cover Name","value":"Radical Textured Polyester"},{"key":"Radius of Gyration: RG (15LB)","value":"2.51"},{"key":"Differential: Diff (15LB)","value":".053"},{"key":"Mass Bias Strength","value":".017"},{"key":"Flare Potential","value":"4 - 5 Inches"},{"key":"Surface Finish","value":"1000 Grit Polish"},{"key":"Preferred Lane Conditions","value":"Dry"},{"key":"Bowling Ball Color","value":"Red"},{"key":"LT Product Category","value":"Bowling Balls"},{"key":"LT Product Subcategory","value":"Entry Level Bowling Balls"},{"key":"Ball Performance Level","value":"Entry Level Novice Bowling Balls, Radical Plastic Bowling Balls"},{"key":"Scent","value":"None"}],"variants":[{"sku":"Radical-Spy-16","gtin":"082775034695","label":"16LB","price":104.95,"stock":4,"options":{"Ball Weight":"16LB"},"availability":"instock","regular_price":179.99},{"sku":"RB6010658415","gtin":"082775034701","label":"15LB","price":104.95,"stock":43,"options":{"Ball Weight":"15LB"},"availability":"instock","regular_price":179.99},{"sku":"Radical-Spy-14","gtin":"082775034718","label":"14LB","price":104.95,"stock":24,"options":{"Ball Weight":"14LB"},"availability":"instock","regular_price":179.99}],"images":[{"alt":"181215269_10157579870966910_5660160606993889099_n","url":"https://www.bowlersmart.com/wp-content/uploads/2021/05/181215269_10157579870966910_5660160606993889099_n.jpg"},{"alt":"b58a2cf5-8eff-4ff8-be2e-1bda817c97f7","url":"https://www.bowlersmart.com/wp-content/uploads/2021/05/b58a2cf5-8eff-4ff8-be2e-1bda817c97f7.png"}],"release_date":null,"description":"A Textured Polyester With a Surprising, Controllable Hook\n\nAbout the The Spy\n\nThe Radical The Spy is a one-of-a-kind specialty ball that pairs a polyester cover with a real asymmetric core. It combines the asymmetric Spy Core with a Textured Polyester coverstock, so it goes straighter and reads later than a reactive ball, but the strong asymmetric core gives it a surprising, controllable hook at the backend. It is the spare ball that does more than go straight.\n\nThe Spy is built for bowlers who want a predictable, controllable shape on dry lanes. Polyester reads the lane gently and resists the oil, but the textured surface and asymmetric Spy core add a defined, controllable move that a plain plastic ball cannot make. The result is a durable, affordable ball that holds a true line with a little extra motion when you need it.\n\nUnderstanding the Radical Spy Asymmetric Core and Radical Textured Polyester\n\nRadical built The Spy to combine polyester control with a real asymmetric hook. Specifically, the asymmetric Spy Core posts a 2.513 RG, a .053 differential, and a .017 intermediate differential, numbers that give the ball a defined breakpoint for a polyester ball, while the Textured Polyester cover reads the lane gently and resists the oil. As a result, it holds a controllable line with a surprising, predictable move at the backend. The per-weight specifications are listed below.\n\nAn Asymmetric Core That Adds a Defined Move to a Polyester Ball\n\nAt the heart of The Spy is the asymmetric Spy Core. At 15 lb it measures a 2.513 RG, a .053 differential, and a .017 intermediate differential, numbers that are genuinely strong for a ball with a polyester cover. The asymmetric core adds a defined, controllable breakpoint that a simple plastic spare ball cannot produce.\n\nRadical wraps the Spy core in DynamiCore for added durability and a stronger hitting ball. Because the core is asymmetric, layout has an influence on the reaction, so your pro shop can tune how much motion The Spy makes. The result is a unique ball: polyester control with a touch of real, controllable hook.\n\nA Textured Polyester Cover for Control With a Touch of Motion\n\nThe Spy is finished with a Textured Polyester coverstock at a 500, 1000 Siaair finish with factory compound and polish. Polyester generates far less friction than reactive resin, so The Spy reads the lane gently and holds a controlled line, but the textured surface adds just enough grip to let the asymmetric core make its move.\n\nThat blend of polyester control and a textured surface is what makes The Spy so unusual: it goes straighter and more predictably than a reactive ball, but it can make a defined, controllable move at the backend. Take the surface down for a bit more grip, or smooth it up for a straighter reaction, with surface changes done at your pro shop.\n\nThe Spy 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 polyester ball with a controllable, defined move for dry lanes and predictable shotmaking\n\n✓Spare Shooters Who Want More: A straighter-than-reactive ball that can still make a controllable move when you need it\n\n✓Straight Players: A durable polyester reaction with a touch of real hook, tunable at the surface\n\n✓Arsenal Builders: A unique specialty piece that bridges a plastic spare ball and a controllable reactive\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 polished: The 500, 1000 Siaair / Factory Compound / Polish finish runs clean and long out of the box. For an earlier read on heavier oil, take the surface down at your pro shop.\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 Spy Fits in Your Radical Arsenal\n\nWhere It Fits in Your Arsenal\n\nIn the Radical lineup, The Spy is a unique specialty ball: a textured polyester with a real asymmetric core. Where a plain plastic ball goes dead straight, The Spy holds a controllable line but can make a defined move at the backend, so it is the ball you reach for on dry lanes when you want predictability with a touch of motion. It pairs with your reactive Radical balls as a control and specialty option.\n\nSurface Adjustments\n\nThe 500, 1000 Siaair finish gives The Spy its controlled polyester read with a touch of grip. Take the surface down for a bit more motion, or smooth and polish it up for a straighter reaction. Have surface changes done at your pro shop for an even, consistent finish.\n\nCoverstock Care\n\nWipe the textured polyester cover with an approved ball cleaner after every session. Polyester is durable and low-maintenance, so a quick wipe keeps The Spy reading the same predictable way for years.\n\nEarn points on every Radical 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 Radical The Spy Bowling Ball ships free with no minimum purchase and is backed by our 60-day return policy. As an authorized Radical dealer, every ball is genuine and covered by the full one-year Radical 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\n2.523\n.046\n.015\n\n15 lbs\n2.513\n.053\n.017\n\n14 lbs\n2.530\n.053\n.017","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/"}]}