{"product_id":"ikon-alloy-20-rim-451x19-5-28h-with-brake-surface","title":"Ikon Alloy 20\" Rim 451x19.5 28h With Brake Surface","description":"\u003ch1\u003eIkon Alloy 20\" Rim 451×19.5 28h With Brake Surface\u003c\/h1\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Ikon UltraLite is a lightweight double-wall rim designed for 20\" BMX race wheels. CNC-machined from 6061-T6 aluminum with optimized internal geometry, this 28-hole rear rim weighs 283 grams and features an aero profile with angled spoke holes for improved wheel stiffness. Includes CNC-machined brake surface for caliper or U-brake compatibility.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cp\u003e• \u003cstrong\u003e6061-T6 aluminum construction\u003c\/strong\u003e – Heat-treated aluminum alloy with optimized internal geometry removes excess material while maintaining impact resistance and lateral stiffness\u003c\/p\u003e\n\u003cp\u003e• \u003cstrong\u003eLow-profile aero shape\u003c\/strong\u003e – Streamlined 16.3mm rim height reduces aerodynamic drag and weight while providing sufficient strength for race applications\u003c\/p\u003e\n\u003cp\u003e• \u003cstrong\u003eAngled spoke holes\u003c\/strong\u003e – Slightly inclined nipple holes create a more direct spoke angle to the hub flange, improving spoke tension distribution and reducing stress at the spoke bed\u003c\/p\u003e\n\u003cp\u003e• \u003cstrong\u003eCNC-machined brake surface\u003c\/strong\u003e – Precision-machined sidewalls provide consistent braking performance with caliper or U-brake systems\u003c\/p\u003e\n\u003cp\u003e• \u003cstrong\u003eTubeless-ready bead lock system\u003c\/strong\u003e – Integrated bead lock shelf secures tubeless tire beads without additional rim strips when using tubeless-specific tires, sealant, valves, and rim tape\u003c\/p\u003e\n\u003cp\u003e• \u003cstrong\u003eDouble-polished anodized finish\u003c\/strong\u003e – Black anodized surface with water-transfer graphics provides corrosion resistance and visual customization in four color options\u003c\/p\u003e\n\u003cp\u003e• \u003cstrong\u003e28-hole drilling\u003c\/strong\u003e – Reduced spoke count lowers wheel weight while maintaining adequate strength for lighter riders or those prioritizing minimal rotational mass\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp\u003e• \u003cstrong\u003eRim size:\u003c\/strong\u003e 20\" × 1 1\/8\" to 1 3\/8\" (451mm BSD)\u003cbr\u003e• \u003cstrong\u003eExternal width:\u003c\/strong\u003e 19.5 mm\u003cbr\u003e• \u003cstrong\u003eInternal width:\u003c\/strong\u003e 14.6 mm (rear spec)\u003cbr\u003e• \u003cstrong\u003eRim height:\u003c\/strong\u003e 16.3 mm\u003cbr\u003e• \u003cstrong\u003eSpoke holes:\u003c\/strong\u003e 28h\u003cbr\u003e• \u003cstrong\u003eWeight:\u003c\/strong\u003e 283 g (10 oz)\u003cbr\u003e• \u003cstrong\u003eERD (Effective Rim Diameter):\u003c\/strong\u003e 434 mm\u003cbr\u003e• \u003cstrong\u003eMaterial:\u003c\/strong\u003e 6061-T6 aluminum\u003cbr\u003e• \u003cstrong\u003eWall type:\u003c\/strong\u003e Double-wall with angled spoke holes\u003cbr\u003e• \u003cstrong\u003eValve type:\u003c\/strong\u003e Presta\u003cbr\u003e• \u003cstrong\u003eBrake compatibility:\u003c\/strong\u003e Rear wheel with machined brake surface (V-brake, caliper, U-brake)\u003cbr\u003e• \u003cstrong\u003eFinish:\u003c\/strong\u003e Double-polished black anodized with water-transfer graphics\u003cbr\u003e• \u003cstrong\u003eGraphic color options:\u003c\/strong\u003e White, Blue, Red, Neon Yellow\u003cbr\u003e• \u003cstrong\u003eMax pressure:\u003c\/strong\u003e 110 PSI (7.58 bar)\u003cbr\u003e• \u003cstrong\u003eMax spoke tension:\u003c\/strong\u003e 115 kgf\u003cbr\u003e• \u003cstrong\u003eTubeless system:\u003c\/strong\u003e Bead lock compatible (requires tubeless valve, sealant, rim tape)\u003c\/p\u003e\n\u003ch2\u003eCompatibility and Ideal Use Cases\u003c\/h2\u003e\n\u003cp\u003eDesigned for rear wheels on 20\" BMX race bikes using rim brakes (V-brake, caliper, or U-brake). The 28-hole drilling pairs with lightweight cassette or freewheel race hubs for reduced rotational weight while maintaining adequate strength for Mini, Junior, and lighter Expert class riders. Best suited for competitive racing where weight savings are prioritized and riders are within appropriate weight limits for 28-hole wheel builds. 451mm BSD fits standard 20\" × 1 1\/8\" to 1 3\/8\" race tires. Tubeless setup requires additional components: tubeless-specific tire, Presta valve, rim tape, and liquid sealant (all sold separately). Not recommended for disc brake setups or heavier riders who may benefit from 36-hole wheels—brake surface adds weight unnecessary for disc applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Tubeless conversion requires additional components sold separately: tubeless valve, sealant, and rim tape.\u003c\/p\u003e \u003cdiv\u003e\u003cp.\u003e\u003ci\u003e\u003cu\u003e\u003cfont size=\"2\"\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/font\u003e\u003c\/u\u003e\u003c\/i\u003e\u003c\/p.\u003e\u003c\/div\u003e\u003cdiv style=\"\"\u003e\u003ci style=\"font-size: 0.875rem;\"\u003e\u003cu\u003e\u003cfont size=\"3\"\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/font\u003e\u003c\/u\u003e\u003c\/i\u003e\u003c\/div\u003e\u003cdiv style=\"\"\u003e\u003ci style=\"font-size: 0.875rem;\"\u003e\u003cu\u003e\u003cfont size=\"3\"\u003e\u003cb\u003e**Due to unique nature of this item, ALL sales of this product are FINAL. No Refunds or Returns**\u003c\/b\u003e\u003c\/font\u003e\u003c\/u\u003e\u003c\/i\u003e\u003c\/div\u003e","brand":"IKON","offers":[{"title":"Black \/ Blue \/ 20\"x1-1\/8\"-1-3\/8\" (451MM)","offer_id":45037981401267,"sku":"IKRIA4511928WBKBL","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ Red \/ 20\"x1-1\/8\"-1-3\/8\" (451MM)","offer_id":45037981434035,"sku":"IKRIA4511928WBKRD","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ White \/ 20\"x1-1\/8\"-1-3\/8\" (451MM)","offer_id":45305752289459,"sku":"IKRIA4511928WBKWH","price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8737\/2979\/files\/ikon-alloy-20-rim-451x195-28h-with-brake-surface.jpg?v=1783448555","url":"https:\/\/time2shinebmx.com\/products\/ikon-alloy-20-rim-451x19-5-28h-with-brake-surface","provider":"Time 2 Shine ","version":"1.0","type":"link"}