{"product_id":"js4320-aluminum-silicone-wheel-pair-43mm-x-20mm-pair-4mm-hole","title":"JS4320 Aluminum - Silicone Wheel Pair (43mm x 20mm) Pair (4mm Hole)","description":"\u003cstyle\u003e\n    .product-copy{line-height:1.7;color:#222}\n    .product-copy \u003e * + *{margin-top:1rem}\n    .product-copy h2{margin:1.4em 0 .6em;font-size:1.5rem;line-height:1.3}\n    .product-copy h3{margin:1.1em 0 .45em;font-size:1.1rem;line-height:1.35}\n    .product-copy p{margin:0 0 1em}\n    .product-copy ul,.product-copy ol{margin:0 0 1.2em 1.2em}\n    .product-copy li{margin:.35em 0}\n    .product-copy table{width:100%;border-collapse:collapse;margin:1.2em 0}\n    .product-copy table th,.product-copy table td{border:1px solid #e8e8e8;padding:.7em .8em;text-align:left;vertical-align:top}\n    .product-copy table th{background:#fafafa}\n    .product-copy .note{background:#f7fbf8;border:1px solid #dfeee3;border-radius:12px;padding:1rem}\n    .faq-list{margin:1.2rem 0 1.4rem}\n    .faq{border:1px solid #e6e6e6;border-radius:12px;padding:.8rem 1rem;margin:.7rem 0;background:#fafafa}\n    .faq summary{cursor:pointer;font-weight:600}\n    .small{font-size:.96rem;color:#555}\n  \u003c\/style\u003e\n\u003cdiv class=\"product-copy\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eJSumo JS4320 Aluminum Silicone Wheel Pair\u003c\/strong\u003e is a compact, high-grip wheel set made for robot builds that need strong traction and a secure shaft fit. With a machined aluminum hub and soft silicone tire, this wheel pair is a solid choice for \u003ca href=\"\/search?q=sumo+robot\"\u003enon-magnetic sumo robots\u003c\/a\u003e, lightweight combat robots, and other custom drive systems where grip and control matter.\u003c\/p\u003e\n\u003cp\u003eThis version comes with a \u003cstrong\u003e4 mm center hole\u003c\/strong\u003e and an \u003cstrong\u003eM4 tapped setscrew\u003c\/strong\u003e, making it easier to lock the wheel onto compatible motor shafts. If you need a wheel that stays light but still gives a strong contact patch, the JS4320 is a practical option for both new builds and upgrades.\u003c\/p\u003e\n\u003ch2\u003eWhy builders choose this wheel pair\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong traction:\u003c\/strong\u003e Soft silicone tire helps improve grip during pushing, turning, and quick starts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact but capable:\u003c\/strong\u003e Good size for smaller competition and custom robot platforms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum hub:\u003c\/strong\u003e More solid and durable than basic plastic wheel types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure shaft lock:\u003c\/strong\u003e M4 tapped setscrew helps keep the wheel firmly in place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for robot use:\u003c\/strong\u003e A good fit for sumo and lightweight combat builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat you can build\u003c\/h2\u003e\n\u003cp\u003eThis wheel pair works well for \u003ca href=\"\/search?q=sumo+robot+parts\"\u003enon-magnetic sumo robots\u003c\/a\u003e, \u003ca href=\"\/search?q=combat+robot\"\u003elightweight combat robots\u003c\/a\u003e, and compact two-wheel drive robots that need reliable floor grip.\u003c\/p\u003e\n\u003cp\u003eIt is also useful for custom chassis projects, small drive platforms, and robot upgrades where you want a balanced mix of low weight and good traction.\u003c\/p\u003e\n\u003ch2\u003eStarter bundles\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/jsumo\"\u003eBrowse JSumo robot parts\u003c\/a\u003e for matching mechanical and drive parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?q=dc+gear+motor\"\u003eDC gear motors\u003c\/a\u003e for compact robot movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?q=sumo+robot+chassis\"\u003eSumo robot chassis parts\u003c\/a\u003e for competition-ready builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended add-ons\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?q=motor+bracket\"\u003eMotor brackets\u003c\/a\u003e for easier wheel mounting.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?q=shaft+coupler\"\u003eShaft and drive hardware\u003c\/a\u003e for custom setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?q=robot+chassis\"\u003eRobot chassis parts\u003c\/a\u003e for fresh builds and upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/search?q=hex+wrench\"\u003eHex tools\u003c\/a\u003e for assembly and maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct name\u003c\/th\u003e\n\u003ctd\u003eJS4320 Aluminum Silicone Wheel Pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eJS4320\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct code\u003c\/th\u003e\n\u003ctd\u003eJS20786\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWheel diameter\u003c\/th\u003e\n\u003ctd\u003e43 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWheel width\u003c\/th\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e26 g each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSilicone hardness\u003c\/th\u003e\n\u003ctd\u003e20 Shore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCenter hole diameter\u003c\/th\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShaft locking\u003c\/th\u003e\n\u003ctd\u003eM4 tapped setscrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSuggested use\u003c\/th\u003e\n\u003ctd\u003eNon-magnetic sumo robots, 1 lb to 3 lb combat robots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFitment \u0026amp; shaft notes\u003c\/h2\u003e\n\u003cdiv class=\"note\"\u003e\n\u003cp\u003eThis version is made with a \u003cstrong\u003e4 mm shaft hole\u003c\/strong\u003e. Please check your motor shaft size before ordering to make sure the fit is correct.\u003c\/p\u003e\n\u003cp class=\"small\"\u003eJSumo states that the JS4320 model is produced with a 4 mm hole for this version.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhat’s in the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2 x wheels\u003c\/li\u003e\n\u003cli\u003e2 x M4 setscrews\u003c\/li\u003e\n\u003cli\u003e1 x Allen wrench\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdiv class=\"faq-list\"\u003e\n\u003cdetails class=\"faq\"\u003e\n\u003csummary\u003eIs this sold as a pair?\u003c\/summary\u003e\n\u003cp\u003eYes. This product includes two wheels in one set.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"faq\"\u003e\n\u003csummary\u003eWhat shaft size does it fit?\u003c\/summary\u003e\n\u003cp\u003eThis version has a 4 mm center hole, so it is made for 4 mm shaft setups.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"faq\"\u003e\n\u003csummary\u003eHow is the wheel secured to the shaft?\u003c\/summary\u003e\n\u003cp\u003eIt uses an M4 tapped setscrew to lock the wheel onto the shaft.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"faq\"\u003e\n\u003csummary\u003eWhat robots is this best for?\u003c\/summary\u003e\n\u003cp\u003eIt is a good fit for non-magnetic sumo robots, lightweight combat robots, and compact custom drive builds.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"faq\"\u003e\n\u003csummary\u003eIs the tire made for grip?\u003c\/summary\u003e\n\u003cp\u003eYes. The silicone tire is made to give strong traction for robot movement and pushing power.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cp class=\"small\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"circuitrocks","offers":[{"title":"Default Title","offer_id":52480094601505,"sku":"JS20786","price":2888.0,"currency_code":"PHP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/1491\/5617\/files\/js4320-aluminum-silicone-wheel-pair-43mm-x-20mm-pair-4-4915-17-B.jpg?v=1774338919","url":"https:\/\/circuit.rocks\/products\/js4320-aluminum-silicone-wheel-pair-43mm-x-20mm-pair-4mm-hole","provider":"circuitrocks","version":"1.0","type":"link"}