{"product_id":"3r40-inner-3-speed-rear-hub-28-hole-internal-gear-bicycle-drum","title":"3R40 Internal 3-Speed Rear Hub – 28-Hole Bicycle Gear Drum","description":"\n\u003ch2\u003e3R40 Inner Three-Speed Rear Hub with 28-Hole Handle Cover\u003c\/h2\u003e\n\u003cp\u003eUpgrade your bicycle's drivetrain with the \u003cstrong\u003e3R40 Inner Variable-Speed Rear Hub\u003c\/strong\u003e — a precision-engineered internal gear drum designed for smooth, reliable multi-speed cycling. Featuring a robust 28-hole lacing pattern and a durable handle cover, this flower drum hub integrates seamlessly into classic city bikes, commuter bikes, and cruisers that demand dependable internal gear shifting.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3-Speed Internal Gearing:\u003c\/strong\u003e Smooth in-hub gear transitions keep your drivetrain clean and protected from the elements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e28-Hole Flange:\u003c\/strong\u003e Standard 28-hole spoke pattern ensures compatibility with a wide range of wheel builds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Variable Speed Mechanism:\u003c\/strong\u003e Enclosed gear system for low-maintenance, all-weather performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRear Axle Shaft Design:\u003c\/strong\u003e Precision-machined rear shaft provides stable, centered wheel alignment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandle Cover Included:\u003c\/strong\u003e Protective cover shields the hub mechanism and maintains a clean finish.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built to withstand daily commuting and regular cycling demands.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 3R40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeeds:\u003c\/strong\u003e 3-Speed Internal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHole Count:\u003c\/strong\u003e 28-Hole\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Internal Gear Rear Hub (Flower Drum)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Rear\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Handle Cover\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCity and commuter bicycle builds or rebuilds\u003c\/li\u003e\n  \u003cli\u003eReplacing worn or damaged internal gear hubs\u003c\/li\u003e\n  \u003cli\u003eTraditional cruiser and urban bike restorations\u003c\/li\u003e\n  \u003cli\u003eCyclists who prefer a clean, chain-guard-compatible drivetrain\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-3m-spiral-cable-protector-xiaomi-m365-ninebot-electric-scooter\"\u003e1.3m Spiral Cable Protector for Xiaomi M365 \u0026amp; Ninebot Scooter\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-5m-soft-tape-measure-double-scale-60-inch-sewing-tailor-ruler\"\u003e1.5M Soft Tape Measure – Double Scale 60 Inch Sewing Ruler\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExternal Resource\u003c\/h3\u003e\n\u003cp\u003eFor general bicycle safety standards and maintenance guidance, visit the U.S. Consumer Product Safety Commission – Bicycle Safety Guide.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Bicycle_wheel\" target=\"_blank\" rel=\"noopener\"\u003eBicycle wheel\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What type of bicycle is the 3R40 internal gear rear hub compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The 3R40 three-speed internal gear rear hub is compatible with most standard city, commuter, and cruiser bicycles that use a 28-hole rear wheel lacing pattern. Always verify your frame's dropout spacing and axle dimensions before purchasing.\u003c\/p\u003e\n\u003ch4\u003eQ: What are the advantages of an internal gear hub over a traditional derailleur system?\u003c\/h4\u003e\n\u003cp\u003eA: Internal gear hubs like the 3R40 enclose all moving gear components within the hub shell, protecting them from dirt, moisture, and debris. This results in lower maintenance requirements, reliable all-weather shifting, and compatibility with full chain guards for a cleaner bike setup.\u003c\/p\u003e\n\u003ch4\u003eQ: Does this hub come with all necessary hardware for installation?\u003c\/h4\u003e\n\u003cp\u003eA: The 3R40 rear hub includes the handle cover as specified. It is recommended to consult a local bike mechanic or refer to your bicycle's manual for spoke length requirements and any additional hardware needed for wheel building or installation.\u003c\/p\u003e\n\u003ch4\u003eQ: What does \"28-hole\" mean for a bicycle hub?\u003c\/h4\u003e\n\u003cp\u003eA: The \"28-hole\" specification refers to the number of spoke holes on the hub flange. This determines how many spokes the wheel will use, and it must match your rim's hole count. 28-hole is a common standard for lightweight city and commuter builds.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What type of bicycle is the 3R40 internal gear rear hub compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 3R40 three-speed internal gear rear hub is compatible with most standard city, commuter, and cruiser bicycles that use a 28-hole rear wheel lacing pattern. Always verify your frame's dropout spacing and axle dimensions before purchasing.\"}}, {\"@type\": \"Question\", \"name\": \"What are the advantages of an internal gear hub over a traditional derailleur system?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Internal gear hubs like the 3R40 enclose all moving gear components within the hub shell, protecting them from dirt, moisture, and debris. This results in lower maintenance requirements, reliable all-weather shifting, and compatibility with full chain guards for a cleaner bike setup.\"}}, {\"@type\": \"Question\", \"name\": \"Does this hub come with all necessary hardware for installation?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 3R40 rear hub includes the handle cover as specified. It is recommended to consult a local bike mechanic or refer to your bicycle's manual for spoke length requirements and any additional hardware needed for wheel building or installation.\"}}, {\"@type\": \"Question\", \"name\": \"What does \\\"28-hole\\\" mean for a bicycle hub?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The \\\"28-hole\\\" specification refers to the number of spoke holes on the hub flange. This determines how many spokes the wheel will use, and it must match your rim's hole count. 28-hole is a common standard for lightweight city and commuter builds.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Fitness \u0026 Cycling\", \"item\": \"https:\/\/oasis-select.com\/collections\/fitness-cycling\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"3R40 Internal 3-Speed Rear Hub – 28-Hole Bicycle Gear Drum\", \"item\": \"https:\/\/oasis-select.com\/products\/3r40-inner-3-speed-rear-hub-28-hole-internal-gear-bicycle-drum\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"black","offer_id":47745287684201,"sku":"14:193#black","price":253.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/Saaca7e292dc3464a8a0adf66aee8dd88H.webp?v=1783031498","url":"https:\/\/oasis-select.com\/products\/3r40-inner-3-speed-rear-hub-28-hole-internal-gear-bicycle-drum","provider":"Oasis Select","version":"1.0","type":"link"}