{"product_id":"pressed-steel-swivel-castors-with-black-polypropylene-wheel-50mm-100mm","title":"Pressed Steel Swivel Castors With Black Polypropylene Wheel - 50mm to 100mm","description":"\u003cstyle\u003e*{box-sizing:border-box;margin:0;padding:0}body{font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;color:#1a1a1a;background:#fff;line-height:1.7}.pd-wrap{max-width:900px;margin:0 auto;padding:32px 20px}.pd-hero{background:#f4f4f4;border-left:4px solid #1a1a1a;padding:28px 32px;margin-bottom:40px}.pd-hero h1{font-size:1.75rem;font-weight:700;letter-spacing:-0.5px;margin-bottom:12px;color:#111}.pd-hero p{font-size:1rem;color:#444;max-width:720px}.pd-section{margin-bottom:44px}.pd-section h2{font-size:1.2rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;border-bottom:2px solid #1a1a1a;padding-bottom:8px;margin-bottom:20px;color:#111}.compare-table{width:100%;border-collapse:collapse;font-size:0.9rem;margin-bottom:8px}.compare-table th{background:#1a1a1a;color:#fff;padding:11px 14px;text-align:left;font-weight:600;letter-spacing:0.5px}.compare-table td{padding:10px 14px;border-bottom:1px solid #e0e0e0;vertical-align:top}.compare-table tr:nth-child(even) td{background:#f9f9f9}.compare-table tr:hover td{background:#f0f0f0}.variant-block{border:1px solid #e0e0e0;border-radius:4px;margin-bottom:28px;overflow:hidden}.variant-block-header{background:#1a1a1a;color:#fff;padding:14px 20px;font-size:1rem;font-weight:700;letter-spacing:0.5px}.variant-block-body{padding:20px}.spec-table{width:100%;border-collapse:collapse;font-size:0.9rem}.spec-table td{padding:9px 12px;border-bottom:1px solid #ebebeb;vertical-align:top}.spec-table td:first-child{font-weight:600;color:#333;width:46%;white-space:nowrap}.spec-table tr:last-child td{border-bottom:none}.apps-list{margin-top:14px;padding-left:0;list-style:none}.apps-list li{padding:5px 0;font-size:0.92rem;color:#444;border-bottom:1px solid #f0f0f0}.apps-list li:last-child{border-bottom:none}.apps-list li::before{content:'? ';font-weight:700;color:#1a1a1a}.faq-block{margin-bottom:20px;border-left:3px solid #1a1a1a;padding-left:18px}.faq-block h3{font-size:0.97rem;font-weight:700;color:#111;margin-bottom:6px}.faq-block p{font-size:0.92rem;color:#444}.note{font-size:0.82rem;color:#888;margin-top:6px}\u003c\/style\u003e\n\u003cdiv class=\"pd-wrap\"\u003e\n\u003cdiv class=\"pd-hero\"\u003e\n\u003ch1\u003ePressed Steel Swivel Castors with Black Polypropylene Wheel — 50mm to 100mm\u003c\/h1\u003e\n\u003cp\u003eA robust, light-duty swivel castor engineered for smooth, reliable mobility across a wide range of indoor environments. Constructed with a pressed steel housing and a solid black polypropylene wheel, these castors are designed to mount quickly via a four-hole top plate and deliver consistent performance under load. Available in three wheel diameters — 50mm, 75mm, and 100mm — each size is rated to a specific load capacity, making it straightforward to select the right castor for your application.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003cdiv style=\"background-color: #fffbd3; padding: 25px; border-radius: 8px; border-left: 6px solid #ffcc00; border-right: 6px solid #ffcc00; border-top: 2px solid #ffcc00; border-bottom: 2px solid #ffcc00; margin: 20px 0;\"\u003e\n\u003ch3\u003e\u003cstrong\u003eAvailable in Multiple Castor Wheel Sizes \u0026amp; Types\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; color: #282500; margin: 0; line-height: 1.7;\"\u003eExplore this castor wheel's different types, and also Available in multiple sizes. Choose the options below.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"..\/products\/pressed-steel-braked-swivel-castors-with-black-polypropylene-wheel-50mm-100mm\" target=\"_blank\"\u003e\u003cstrong\u003eBraked Swivel Castors \u003c\/strong\u003e With Black Polypropylene Wheel - 50mm to 100mm \u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"..\/products\/pressed-steel-fixed-castors-with-black-polypropylene-wheel-50mm-to-100mm\" target=\"_blank\"\u003e\u003cstrong\u003eFixed Castors \u003c\/strong\u003e With Black Polypropylene Wheel - 50mm to 100mm \u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-section\"\u003e\n\u003ch2\u003eQuick Comparison — All Options at a Glance\u003c\/h2\u003e\n\u003ctable class=\"compare-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003e50mm — 65 kg\u003c\/th\u003e\n\u003cth\u003e75mm — 75 kg\u003c\/th\u003e\n\u003cth\u003e100mm — 85 kg\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Diameter\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003ctd\u003e75 mm\u003c\/td\u003e\n\u003ctd\u003e100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Capacity\u003c\/td\u003e\n\u003ctd\u003e65 kg\u003c\/td\u003e\n\u003ctd\u003e75 kg\u003c\/td\u003e\n\u003ctd\u003e85 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTotal Load Capacity of 4 Castors\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e195 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e225 kg\u003c\/td\u003e\n\u003ctd\u003e255 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Height\u003c\/td\u003e\n\u003ctd\u003e72 mm\u003c\/td\u003e\n\u003ctd\u003e100 mm\u003c\/td\u003e\n\u003ctd\u003e122 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTread Width\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwivel Radius\u003c\/td\u003e\n\u003ctd\u003e48 mm\u003c\/td\u003e\n\u003ctd\u003e70 mm\u003c\/td\u003e\n\u003ctd\u003e83 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop Plate Size\u003c\/td\u003e\n\u003ctd\u003e60 × 60 mm\u003c\/td\u003e\n\u003ctd\u003e60 × 60 mm\u003c\/td\u003e\n\u003ctd\u003e60 × 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Pattern\u003c\/td\u003e\n\u003ctd\u003e4-Hole\u003c\/td\u003e\n\u003ctd\u003e4-Hole\u003c\/td\u003e\n\u003ctd\u003e4-Hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Material\u003c\/td\u003e\n\u003ctd\u003ePolypropylene\u003c\/td\u003e\n\u003ctd\u003ePolypropylene\u003c\/td\u003e\n\u003ctd\u003ePolypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003ePressed Steel\u003c\/td\u003e\n\u003ctd\u003ePressed Steel\u003c\/td\u003e\n\u003ctd\u003ePressed Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Type\u003c\/td\u003e\n\u003ctd\u003ePlain\u003c\/td\u003e\n\u003ctd\u003ePlain\u003c\/td\u003e\n\u003ctd\u003ePlain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrake\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"note\"\u003e* All measurements are nominal. Refer to individual variant specifications below for full detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-section\"\u003e\n\u003ch2\u003eVariant Specifications \u0026amp; Applications\u003c\/h2\u003e\n\u003cdiv class=\"variant-block\"\u003e\n\u003cdiv class=\"variant-block-header\"\u003e50mm Wheel \/ 65 kg Load Capacity\u003c\/div\u003e\n\u003cdiv class=\"variant-block-body\"\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Diameter\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Capacity\u003c\/td\u003e\n\u003ctd\u003e65 kg per castor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Height (Floor to Plate)\u003c\/td\u003e\n\u003ctd\u003e72 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTread Width\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwivel Radius\u003c\/td\u003e\n\u003ctd\u003e48 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop Plate Dimensions\u003c\/td\u003e\n\u003ctd\u003e60 mm × 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Pattern\u003c\/td\u003e\n\u003ctd\u003e4-Hole Top Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Centres (Diagonal)\u003c\/td\u003e\n\u003ctd\u003e48 mm × 48 mm (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Material\u003c\/td\u003e\n\u003ctd\u003eBlack Polypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing \/ Bracket Material\u003c\/td\u003e\n\u003ctd\u003ePressed Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Type\u003c\/td\u003e\n\u003ctd\u003ePlain Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwivel Action\u003c\/td\u003e\n\u003ctd\u003e360° Swivel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrake\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor Type Suitability\u003c\/td\u003e\n\u003ctd\u003eHard, smooth, and semi-smooth indoor floors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-weight: bold; margin-top: 18px; margin-bottom: 8px; font-size: 0.93rem; text-transform: uppercase; letter-spacing: 0.5px;\"\u003eTypical Applications\u003c\/p\u003e\n\u003cul class=\"apps-list\"\u003e\n\u003cli\u003eLight-duty trolleys and hand carts in retail and stockroom environments\u003c\/li\u003e\n\u003cli\u003eDisplay stands, shelving units, and point-of-sale fixtures\u003c\/li\u003e\n\u003cli\u003eOffice furniture including pedestals, filing cabinets, and small storage units\u003c\/li\u003e\n\u003cli\u003eDomestic appliances, laundry carts, and household storage solutions\u003c\/li\u003e\n\u003cli\u003eWorkshop benches and small equipment stands requiring compact mobility\u003c\/li\u003e\n\u003cli\u003eHospitality trolleys, room service carts, and catering equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"variant-block\"\u003e\n\u003cdiv class=\"variant-block-header\"\u003e75mm Wheel \/ 75 kg Load Capacity\u003c\/div\u003e\n\u003cdiv class=\"variant-block-body\"\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Diameter\u003c\/td\u003e\n\u003ctd\u003e75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Capacity\u003c\/td\u003e\n\u003ctd\u003e75 kg per castor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Height (Floor to Plate)\u003c\/td\u003e\n\u003ctd\u003e100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTread Width\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwivel Radius\u003c\/td\u003e\n\u003ctd\u003e70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop Plate Dimensions\u003c\/td\u003e\n\u003ctd\u003e60 mm × 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Pattern\u003c\/td\u003e\n\u003ctd\u003e4-Hole Top Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Centres (Diagonal)\u003c\/td\u003e\n\u003ctd\u003e48 mm × 48 mm (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Material\u003c\/td\u003e\n\u003ctd\u003eBlack Polypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing \/ Bracket Material\u003c\/td\u003e\n\u003ctd\u003ePressed Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Type\u003c\/td\u003e\n\u003ctd\u003ePlain Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwivel Action\u003c\/td\u003e\n\u003ctd\u003e360° Swivel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrake\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor Type Suitability\u003c\/td\u003e\n\u003ctd\u003eHard, smooth, and semi-smooth indoor floors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-weight: bold; margin-top: 18px; margin-bottom: 8px; font-size: 0.93rem; text-transform: uppercase; letter-spacing: 0.5px;\"\u003eTypical Applications\u003c\/p\u003e\n\u003cul class=\"apps-list\"\u003e\n\u003cli\u003eMedium-duty platform trolleys and warehouse picking carts\u003c\/li\u003e\n\u003cli\u003eIndustrial shelving, racking units, and mobile storage bays\u003c\/li\u003e\n\u003cli\u003eHealthcare equipment including dressing trolleys and medical supply carts\u003c\/li\u003e\n\u003cli\u003eCatering and hospitality service trolleys requiring a higher ground clearance\u003c\/li\u003e\n\u003cli\u003eWorkshop and maintenance equipment stands with moderate load requirements\u003c\/li\u003e\n\u003cli\u003eRetail gondola units, display fixtures, and mobile merchandising stands\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"variant-block\"\u003e\n\u003cdiv class=\"variant-block-header\"\u003e100mm Wheel \/ 85 kg Load Capacity\u003c\/div\u003e\n\u003cdiv class=\"variant-block-body\"\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Diameter\u003c\/td\u003e\n\u003ctd\u003e100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Capacity\u003c\/td\u003e\n\u003ctd\u003e85 kg per castor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Height (Floor to Plate)\u003c\/td\u003e\n\u003ctd\u003e122 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTread Width\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwivel Radius\u003c\/td\u003e\n\u003ctd\u003e83 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop Plate Dimensions\u003c\/td\u003e\n\u003ctd\u003e60 mm × 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Pattern\u003c\/td\u003e\n\u003ctd\u003e4-Hole Top Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHole Centres (Diagonal)\u003c\/td\u003e\n\u003ctd\u003e48 mm × 48 mm (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Material\u003c\/td\u003e\n\u003ctd\u003eBlack Polypropylene\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing \/ Bracket Material\u003c\/td\u003e\n\u003ctd\u003ePressed Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Type\u003c\/td\u003e\n\u003ctd\u003ePlain Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwivel Action\u003c\/td\u003e\n\u003ctd\u003e360° Swivel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrake\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor Type Suitability\u003c\/td\u003e\n\u003ctd\u003eHard, smooth, and semi-smooth indoor floors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-weight: bold; margin-top: 18px; margin-bottom: 8px; font-size: 0.93rem; text-transform: uppercase; letter-spacing: 0.5px;\"\u003eTypical Applications\u003c\/p\u003e\n\u003cul class=\"apps-list\"\u003e\n\u003cli\u003eHeavy-duty warehouse trolleys, pallet movers, and goods transport equipment\u003c\/li\u003e\n\u003cli\u003eIndustrial workbenches, machine bases, and heavy equipment stands\u003c\/li\u003e\n\u003cli\u003eLarge catering and hospitality trolleys carrying substantial loads\u003c\/li\u003e\n\u003cli\u003eHealthcare and institutional equipment requiring a higher ride height and greater load tolerance\u003c\/li\u003e\n\u003cli\u003eFurniture manufacturing and assembly line mobility solutions\u003c\/li\u003e\n\u003cli\u003eStorage and distribution centre picking trolleys and order fulfilment carts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pd-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq-block\"\u003e\n\u003ch3\u003eHow do I choose the right wheel diameter for my application?\u003c\/h3\u003e\n\u003cp\u003eAs a general rule, a larger wheel diameter rolls more easily over uneven surfaces and distributes load more effectively, making it better suited to heavier or more demanding applications. The 50mm option is ideal for compact, light-duty use; the 75mm suits medium-duty environments with moderate loads; and the 100mm is the preferred choice where higher load capacity and greater ground clearance are required. Always ensure the total height of the castor is compatible with the clearance available on your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\n\u003ch3\u003eAre these castors suitable for use on hard floors such as tiles or concrete?\u003c\/h3\u003e\n\u003cp\u003eYes. The solid black polypropylene wheel is well suited to hard, smooth, and semi-smooth indoor floor surfaces including concrete, tile, vinyl, and laminate. Polypropylene is a hard-wearing material that performs reliably on these surfaces. It is not recommended for use on soft, carpeted, or heavily textured floors where a softer wheel compound would be more appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\n\u003ch3\u003eWhat does the 4-hole top plate configuration mean, and how does it affect fitting?\u003c\/h3\u003e\n\u003cp\u003eThe 4-hole top plate is the mounting interface that attaches the castor to your equipment. It features four bolt holes arranged in a square or rectangular pattern, allowing the castor to be bolted securely to a flat surface. The plate dimensions are 60mm × 60mm across all three variants, with hole centres of approximately 48mm × 48mm diagonally. This standardised plate size makes it straightforward to replace existing castors or fit these units to new equipment without modification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\n\u003ch3\u003eCan these castors be used outdoors?\u003c\/h3\u003e\n\u003cp\u003eThese castors are designed and rated for indoor use on hard, smooth surfaces. While the polypropylene wheel material has reasonable resistance to moisture, the pressed steel housing may be susceptible to corrosion if exposed to outdoor conditions, wet environments, or prolonged contact with moisture. For outdoor or wet-area applications, a castor with a stainless steel or zinc-plated housing and a suitable wheel compound would be a more appropriate choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Castorsuk.co.uk","offers":[{"title":"50mm - 65 KG","offer_id":56864439402876,"sku":null,"price":13.07,"currency_code":"GBP","in_stock":true},{"title":"75mm - 75 KG","offer_id":56864439435644,"sku":null,"price":15.65,"currency_code":"GBP","in_stock":true},{"title":"100mm - 85 KG","offer_id":56864439468412,"sku":null,"price":18.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0621\/7003\/8451\/files\/75-1_100eac0f-92db-48ab-be80-a953fd585eb2.jpg?v=1781180438","url":"https:\/\/castorsuk.co.uk\/products\/pressed-steel-swivel-castors-with-black-polypropylene-wheel-50mm-100mm","provider":"castorsuk.co.uk","version":"1.0","type":"link"}