{"product_id":"aluminum-cable-pulley","title":"Andreoni Aluminum Cable Pulley with Bearing Wheel – Large \u0026 Small","description":"\u003cp\u003e\u003cstrong\u003eSmooth, strong and gentle on your cables.\u003c\/strong\u003e\u003cbr\u003eAndreoni pulleys let you redirect your cable, change the angle of pull, or double the resistance of a single-cable machine. They're made from durable aviation-grade aluminum alloy, and the wheel runs on bearings for a very smooth, quiet glide.\u003c\/p\u003e\n\u003ch3\u003eChoose your size\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eLarge\u003c\/th\u003e\n\u003cth\u003eSmall\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel diameter\u003c\/td\u003e\n\u003ctd\u003e2.4\" (61 mm)\u003c\/td\u003e\n\u003ctd\u003e1.32\" (33.5 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight × width\u003c\/td\u003e\n\u003ctd\u003e4.8\" × 3.2\" (122 × 81 mm)\u003c\/td\u003e\n\u003ctd\u003e2.9\" × 1.82\" (74 × 46 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreaking strength at the attachment\u003c\/td\u003e\n\u003ctd\u003e32 kN (7,194 lbf)\u003c\/td\u003e\n\u003ctd\u003e20 kN (4,496 lbf)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreaking strength per cable side\u003c\/td\u003e\n\u003ctd\u003e16 kN (3,597 lbf)\u003c\/td\u003e\n\u003ctd\u003e10 kN (2,248 lbf)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax rope or cable diameter\u003c\/td\u003e\n\u003ctd\u003e16 mm (0.63\")\u003c\/td\u003e\n\u003ctd\u003e12 mm (0.47\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel\u003c\/td\u003e\n\u003ctd\u003eBearing-mounted, ultra-smooth\u003c\/td\u003e\n\u003ctd\u003eBearing-mounted, ultra-smooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAll kN ratings are breaking strengths, not working loads, so always use the pulley well below them. Both sizes are still far stronger than any home cable machine needs. The real difference is how gentle they are on your cable.\u003c\/p\u003e\n\u003ch3\u003eWhich size is right for you?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSmall pulley: lighter, precise work.\u003c\/strong\u003e Ideal for exercises with less weight, like lateral raises, curls, tricep extensions, face pulls and other exercises for smaller muscles. It's compact and light, so it's quick to set up and easy to move.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLarge pulley: heavy loads and high tension.\u003c\/strong\u003e Built for heavier lifting and high cable tension, such as multiplying the resistance on a VOLTRA or another single-cable machine. Its bigger wheel is also gentler on your cable under heavy load.\u003c\/p\u003e\n\u003ch3\u003eWhy a bigger wheel protects your cable\u003c\/h3\u003e\n\u003cp\u003eEvery time a cable runs over a pulley, it bends, and the tighter the bend, the faster the cable wears. Two standard engineering formulas show why:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBending stress: σ = E × d ÷ D\u003c\/strong\u003e\u003cbr\u003eE = stiffness of the cable material · d = diameter of the cable's individual strands · \u003cstrong\u003eD = wheel diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"andreoni-diagram\" style=\"margin:12px 0 24px;\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 360\" width=\"100%\" role=\"img\" aria-labelledby=\"andrD1t\" style=\"max-width:640px;height:auto;display:block;margin:16px auto;\"\u003e\u003ctitle id=\"andrD1t\"\u003eThe same cable bent over a 2.4-inch Large wheel and a 1.32-inch Small wheel. The small wheel bends the cable much more tightly.\u003c\/title\u003e\n\u003cdefs\u003e\u003cmarker id=\"andrA1\" viewbox=\"0 0 10 10\" refx=\"9\" refy=\"5\" markerwidth=\"7\" markerheight=\"7\" orient=\"auto-start-reverse\"\u003e\u003cpath d=\"M0,0 L10,5 L0,10 z\" fill=\"#555\"\u003e\u003c\/path\u003e\u003c\/marker\u003e\u003c\/defs\u003e\u003crect x=\"0\" y=\"0\" width=\"640\" height=\"360\" fill=\"#ffffff\"\u003e\u003c\/rect\u003e\u003ctext x=\"320\" y=\"30\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"19\" font-weight=\"700\" fill=\"#1a1a1a\"\u003eSame cable, two wheel sizes\u003c\/text\u003e\u003cline x1=\"320\" y1=\"50\" x2=\"320\" y2=\"300\" stroke=\"#e0e0e0\" stroke-width=\"1.5\"\u003e\u003c\/line\u003e\u003ctext x=\"160\" y=\"62\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"15\" font-weight=\"700\" fill=\"#1a1a1a\"\u003eLARGE wheel\u003c\/text\u003e\u003ccircle cx=\"160\" cy=\"170\" r=\"90\" fill=\"#eeeeee\" stroke=\"#9e9e9e\" stroke-width=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"160\" cy=\"170\" r=\"13\" fill=\"#9e9e9e\"\u003e\u003c\/circle\u003e\u003cpath d=\"M70,290 L70,170 A90,90 0 0 1 250,170 L250,290\" fill=\"none\" stroke=\"#1a1a1a\" stroke-width=\"9\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cline x1=\"78\" y1=\"205\" x2=\"242\" y2=\"205\" stroke=\"#555\" stroke-width=\"2\" marker-start=\"url(#andrA1)\" marker-end=\"url(#andrA1)\"\u003e\u003c\/line\u003e\u003ctext x=\"160\" y=\"228\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"15\" font-weight=\"700\" fill=\"#1a1a1a\"\u003eD = 2.4\"\u003c\/text\u003e\u003ctext x=\"160\" y=\"318\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"15\" font-weight=\"700\" fill=\"#2e7d32\"\u003eGentle bend\u003c\/text\u003e\u003ctext x=\"160\" y=\"338\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"14\" fill=\"#2e7d32\"\u003eabout 45% less stress\u003c\/text\u003e\u003ctext x=\"480\" y=\"62\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"15\" font-weight=\"700\" fill=\"#1a1a1a\"\u003eSMALL wheel\u003c\/text\u003e\u003ccircle cx=\"480\" cy=\"210.5\" r=\"49.5\" fill=\"#eeeeee\" stroke=\"#9e9e9e\" stroke-width=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"480\" cy=\"210.5\" r=\"9\" fill=\"#9e9e9e\"\u003e\u003c\/circle\u003e\u003cpath d=\"M430.5,290 L430.5,210.5 A49.5,49.5 0 0 1 529.5,210.5 L529.5,290\" fill=\"none\" stroke=\"#1a1a1a\" stroke-width=\"9\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cline x1=\"438\" y1=\"235\" x2=\"522\" y2=\"235\" stroke=\"#555\" stroke-width=\"2\" marker-start=\"url(#andrA1)\" marker-end=\"url(#andrA1)\"\u003e\u003c\/line\u003e\u003ctext x=\"480\" y=\"148\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"15\" font-weight=\"700\" fill=\"#1a1a1a\"\u003eD = 1.32\"\u003c\/text\u003e\u003ctext x=\"480\" y=\"318\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"15\" font-weight=\"700\" fill=\"#c62828\"\u003eTight bend\u003c\/text\u003e\u003ctext x=\"480\" y=\"338\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"14\" fill=\"#c62828\"\u003eabout 1.8× more stress\u003c\/text\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003ePressure on the cable: P = 2T ÷ (D × d)\u003c\/strong\u003e\u003cbr\u003eT = cable tension · d = cable diameter · \u003cstrong\u003eD = wheel diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"andreoni-diagram\" style=\"margin:12px 0 24px;\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 400\" width=\"100%\" role=\"img\" aria-labelledby=\"andrD2t\" style=\"max-width:640px;height:auto;display:block;margin:16px auto;\"\u003e\u003ctitle id=\"andrD2t\"\u003eIn a doubling setup, the cable wraps halfway around the pulley wheel. Both sides of the cable pull with tension T, so the wheel and cable press together with a total force of 2T, spread over the wheel diameter D and the cable diameter d.\u003c\/title\u003e\n\u003cdefs\u003e\u003cmarker id=\"andrA2\" viewbox=\"0 0 10 10\" refx=\"9\" refy=\"5\" markerwidth=\"7\" markerheight=\"7\" orient=\"auto-start-reverse\"\u003e\u003cpath d=\"M0,0 L10,5 L0,10 z\" fill=\"#1565c0\"\u003e\u003c\/path\u003e\u003c\/marker\u003e\u003cmarker id=\"andrA3\" viewbox=\"0 0 10 10\" refx=\"9\" refy=\"5\" markerwidth=\"6\" markerheight=\"6\" orient=\"auto\"\u003e\u003cpath d=\"M0,0 L10,5 L0,10 z\" fill=\"#e65100\"\u003e\u003c\/path\u003e\u003c\/marker\u003e\u003cmarker id=\"andrA4\" viewbox=\"0 0 10 10\" refx=\"9\" refy=\"5\" markerwidth=\"7\" markerheight=\"7\" orient=\"auto-start-reverse\"\u003e\u003cpath d=\"M0,0 L10,5 L0,10 z\" fill=\"#555\"\u003e\u003c\/path\u003e\u003c\/marker\u003e\u003c\/defs\u003e\u003crect x=\"0\" y=\"0\" width=\"640\" height=\"400\" fill=\"#ffffff\"\u003e\u003c\/rect\u003e\u003ctext x=\"320\" y=\"30\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"19\" font-weight=\"700\" fill=\"#1a1a1a\"\u003eWhat the cable feels in a doubling setup\u003c\/text\u003e\u003ccircle cx=\"320\" cy=\"200\" r=\"90\" fill=\"#eeeeee\" stroke=\"#9e9e9e\" stroke-width=\"3\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"320\" cy=\"200\" r=\"13\" fill=\"#9e9e9e\"\u003e\u003c\/circle\u003e\u003cpath d=\"M230,62 L230,200 A90,90 0 0 0 410,200 L410,62\" fill=\"none\" stroke=\"#1a1a1a\" stroke-width=\"10\" stroke-linecap=\"round\"\u003e\u003c\/path\u003e\u003cline x1=\"196\" y1=\"140\" x2=\"196\" y2=\"70\" stroke=\"#1565c0\" stroke-width=\"3.5\" marker-end=\"url(#andrA2)\"\u003e\u003c\/line\u003e\u003ctext x=\"183\" y=\"112\" text-anchor=\"end\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"18\" font-weight=\"700\" fill=\"#1565c0\"\u003eT\u003c\/text\u003e\u003cline x1=\"444\" y1=\"140\" x2=\"444\" y2=\"70\" stroke=\"#1565c0\" stroke-width=\"3.5\" marker-end=\"url(#andrA2)\"\u003e\u003c\/line\u003e\u003ctext x=\"457\" y=\"112\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"18\" font-weight=\"700\" fill=\"#1565c0\"\u003eT\u003c\/text\u003e\u003ctext x=\"230\" y=\"52\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"12\" fill=\"#555\"\u003eto anchor\u003c\/text\u003e\u003ctext x=\"410\" y=\"52\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"12\" fill=\"#555\"\u003eto machine\u003c\/text\u003e\u003cg stroke=\"#e65100\" stroke-width=\"2.5\" marker-end=\"url(#andrA3)\"\u003e\u003cline x1=\"208.6\" y1=\"246.1\" x2=\"227.1\" y2=\"238.5\"\u003e\u003c\/line\u003e\u003cline x1=\"239.5\" y1=\"296.5\" x2=\"252.3\" y2=\"282.3\"\u003e\u003c\/line\u003e\u003cline x1=\"296.6\" y1=\"319.3\" x2=\"299.0\" y2=\"300.3\"\u003e\u003c\/line\u003e\u003cline x1=\"343.4\" y1=\"319.3\" x2=\"341.0\" y2=\"300.3\"\u003e\u003c\/line\u003e\u003cline x1=\"400.5\" y1=\"296.5\" x2=\"387.7\" y2=\"282.3\"\u003e\u003c\/line\u003e\u003cline x1=\"431.4\" y1=\"246.1\" x2=\"412.9\" y2=\"238.5\"\u003e\u003c\/line\u003e\u003c\/g\u003e\u003ctext x=\"500\" y=\"300\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"14\" font-weight=\"700\" fill=\"#e65100\"\u003eP = pressure\u003c\/text\u003e\u003ctext x=\"500\" y=\"318\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"13\" fill=\"#e65100\"\u003ebetween cable\u003c\/text\u003e\u003ctext x=\"500\" y=\"335\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"13\" fill=\"#e65100\"\u003eand wheel\u003c\/text\u003e\u003cline x1=\"242\" y1=\"172\" x2=\"398\" y2=\"172\" stroke=\"#555\" stroke-width=\"2\" marker-start=\"url(#andrA4)\" marker-end=\"url(#andrA4)\"\u003e\u003c\/line\u003e\u003ctext x=\"320\" y=\"162\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"15\" font-weight=\"700\" fill=\"#1a1a1a\"\u003eD\u003c\/text\u003e\u003cline x1=\"146\" y1=\"200\" x2=\"219\" y2=\"200\" stroke=\"#555\" stroke-width=\"1.5\"\u003e\u003c\/line\u003e\u003ctext x=\"140\" y=\"205\" text-anchor=\"end\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"15\" font-weight=\"700\" fill=\"#1a1a1a\"\u003ed (cable)\u003c\/text\u003e\u003ctext x=\"320\" y=\"372\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"17\" font-weight=\"700\" fill=\"#1a1a1a\"\u003eP = 2T ÷ (D × d)\u003c\/text\u003e\u003ctext x=\"320\" y=\"392\" text-anchor=\"middle\" font-family=\"system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif\" font-size=\"13\" fill=\"#555\"\u003eBoth sides pull with T, so the wheel carries 2T. A bigger wheel spreads it out.\u003c\/text\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cp\u003eIn both formulas, the wheel diameter \u003cstrong\u003eD\u003c\/strong\u003e is on the bottom: \u003cstrong\u003ethe bigger the wheel, the less stress and pressure on your cable.\u003c\/strong\u003e With the same cable, our 2.4\" Large wheel puts about \u003cstrong\u003e45% less\u003c\/strong\u003e bending stress and pressure on it than our 1.32\" Small wheel.\u003c\/p\u003e\n\u003ch3\u003eDoubling the resistance on VOLTRA or another single-cable machine?\u003c\/h3\u003e\n\u003cp\u003eA popular trick on single-cable trainers like VOLTRA is to run the cable around a pulley to double the resistance. In that setup, the machine's cable wraps around the pulley wheel under full tension on every rep, which is exactly what the formulas above describe. VOLTRA uses a synthetic cable, and a small wheel bends it sharply rep after rep, so it wears out faster. Each replacement cable costs money and puts your machine out of action, so with a small pulley the cost adds up over months of heavy training. \u003cstrong\u003eFor doubling resistance, choose the Large pulley.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eVOLTRA is a trademark of its respective owner. Andreoni Fitness is not affiliated with or endorsed by VOLTRA.\u003c\/em\u003e\u003c\/p\u003e","brand":"Andreoni","offers":[{"title":"Large","offer_id":67760519381088,"sku":"AND-PUL-L","price":53.0,"currency_code":"CAD","in_stock":true},{"title":"Small","offer_id":67760519413856,"sku":"AND-PUL-S","price":26.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7003\/4528\/files\/andreoni-aluminum-cable-pulley-large.jpg?v=1794281947","url":"https:\/\/andreoni.fitness\/products\/aluminum-cable-pulley","provider":"Andreoni.Fitness","version":"1.0","type":"link"}