{"product_id":"bola-27-5er-carbon-mtb-downhill-rim-40mm-outer-32mm-inner-wide-30mm-high-for-dh","title":"Wireless Bluetooth Headphones","description":"\u003cp\u003eEngineered for modern downhill MTB, the Bola 27.5\" carbon rim features a robust 40mm outer width and 32mm inner width for superior tire support and stability on aggressive descents. Weighing 560g, its 30mm height and T700\/T800 carbon layup optimize impact resistance while maintaining precise handling, tailored for riders and builders demanding durability, lightweight construction, and competitive performance.\u003c\/p\u003e\n\u003ch2 id=\"tinymce_scroll_sign\"\u003eExplore the Benefits of Wireless Bluetooth Headphones\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Size:\u003c\/strong\u003e 27.5\" (650B, ISO 584mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidths:\u003c\/strong\u003e 40mm outer \/ 32mm inner (hookless, tubeless-ready)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 30mm profile for lateral stiffness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e UD T700\/T800 carbon fiber, epoxy resin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Count:\u003c\/strong\u003e 28H (J-bend\/straight-pull compatible)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 560g ±5%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve:\u003c\/strong\u003e Presta (6.5mm valve hole, customizable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Tires:\u003c\/strong\u003e 2.0–2.6\" MTB, optimized for 2.3–2.5\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Rider Weight:\u003c\/strong\u003e 120kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy 32mm Inner Width?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaximizes cornering grip \u0026amp; reduces pinch-flat risk with wide MTB tires\u003c\/li\u003e\n\u003cli\u003eSupports lower tire pressures for aggressive downhill runs\u003c\/li\u003e\n\u003cli\u003eMeets ETRTO, ISO, and UCI rim\/tire compatibility standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecification Table\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Diameter\u003c\/td\u003e\n\u003ctd\u003e27.5\" \/ 650B (ISO 584mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile Height\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Count\u003c\/td\u003e\n\u003ctd\u003e28H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e540mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole\u003c\/td\u003e\n\u003ctd\u003e6.5mm (Presta, customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTubeless Ready\u003c\/td\u003e\n\u003ctd\u003eYes (hookless profile)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e560g ±5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTest Certifications \u0026amp; Tolerances\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eImpact and fatigue tested per ISO 4210-7\u003c\/li\u003e\n\u003cli\u003eForward compressive strength: \u0026gt;300kg\u003c\/li\u003e\n\u003cli\u003eSpoke hole tension: \u0026gt;280kg\u003c\/li\u003e\n\u003cli\u003eLateral torsion: \u0026gt;50kg\u003c\/li\u003e\n\u003cli\u003eDynamic balance: \u0026lt;3g\u003c\/li\u003e\n\u003cli\u003eFlatness tolerance: \u0026lt;0.15mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eComparison: 27.5\" vs 29\" Carbon DH Rims\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eBola 27.5\" DH\u003c\/th\u003e\n\u003cth\u003eTypical 29\" DH\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Diameter\u003c\/td\u003e\n\u003ctd\u003e27.5\"\u003c\/td\u003e\n\u003ctd\u003e29\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter\/Inner Width\u003c\/td\u003e\n\u003ctd\u003e40\/32mm\u003c\/td\u003e\n\u003ctd\u003e31\/30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e560g\u003c\/td\u003e\n\u003ctd\u003e590–650g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgility\u003c\/td\u003e\n\u003ctd\u003eBetter cornering, faster turns\u003c\/td\u003e\n\u003ctd\u003eSmoother rollover, higher momentum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRider Height Suitability\u003c\/td\u003e\n\u003ctd\u003eShorter\/medium\u003c\/td\u003e\n\u003ctd\u003eMedium\/taller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails class=\"gfai-product-faq\" open=\"\"\u003e\n\u003csummary\u003e\u003cstrong\u003eIs a 27.5 inch carbon MTB rim with 40mm outer width good for downhill riding?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eYes, the 40mm outer\/32mm inner rim is ideal for downhill as it allows for stable tire profiles, increased traction, and improved impact resistance for aggressive terrain.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open=\"\"\u003e\n\u003csummary\u003e\u003cstrong\u003eWhat's the advantage of a 32mm inner width rim for mountain bike downhill setups?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eA 32mm inner width provides wider tire bead seating, allowing use of modern 2.4–2.6\" tires at lower pressures, which increases cornering grip and reduces puncture risk.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open=\"\"\u003e\n\u003csummary\u003e\u003cstrong\u003eHow does a 27.5er carbon DH rim compare to a 29er rim for aggressive trails?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e27.5\" rims offer quicker handling and increased playfulness, while 29\" rims excel at rolling over obstacles. Your choice depends on terrain and rider style.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open=\"\"\u003e\n\u003csummary\u003e\u003cstrong\u003eAre tubeless-ready carbon rims worth it for downhill mountain biking?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eTubeless-ready carbon rims allow lower tire pressures and reduce flats, benefiting traction and comfort in aggressive downhill. Ensure rim tape is installed properly for airtightness.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"gfai-product-faq\" open=\"\"\u003e\n\u003csummary\u003e\u003cstrong\u003eWhat rim depth and width should I look for in a downhill mountain bike wheel?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eLook for inner width of 30–32mm and rim height of 25–32mm for optimal tire support and lateral stiffness when riding technical and steep trails.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSuperior Sound Quality for Immersive Listening\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWireless Bluetooth Headphones deliver exceptional audio clarity and rich bass, ensuring an immersive listening experience. Equipped with advanced drivers and noise-isolating technology, these headphones enhance every note and beat while minimizing external distractions. Designed for audiophiles and casual listeners alike, they bring your favorite tunes to life with crisp highs and deep lows, offering outstanding sound performance whether you're commuting, working, or relaxing at home.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eComfortable and Ergonomic Design\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThese Wireless Bluetooth Headphones are built for prolonged use, featuring soft padded ear cups and an adjustable headband to ensure maximum comfort. The lightweight construction reduces ear fatigue, making them ideal for long listening sessions. Their ergonomic design fits snugly on various head sizes, providing a secure and comfortable fit that doesn’t compromise on style or portability. Perfect for daily use, they combine comfort with durability.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eLong Battery Life and Easy Connectivity\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWith a powerful battery, these Wireless Bluetooth Headphones offer extended playtime, allowing you to enjoy your music for hours without interruption. Quick and seamless Bluetooth pairing ensures compatibility with a wide range of devices such as smartphones, tablets, and laptops. Additionally, some models come with fast charging features to minimize downtime. Whether you're traveling or working out, these headphones provide reliable connectivity and lasting power.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Carbon Fiber Sporting Goods","offers":[{"title":"UD Matt \/ 28\/28 \/ Standard","offer_id":48190936318206,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 28\/28 \/ Superlight","offer_id":48190936350974,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 32\/32 \/ Standard","offer_id":48228973215998,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 32\/32 \/ Superlight","offer_id":48228973248766,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Customs \/ Standard","offer_id":48228973281534,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Customs \/ Superlight","offer_id":48228973314302,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 28\/28 \/ Standard","offer_id":48190936416510,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 28\/28 \/ Superlight","offer_id":48190936449278,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 32\/32 \/ Standard","offer_id":48228973347070,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 32\/32 \/ Superlight","offer_id":48228973379838,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Customs \/ Standard","offer_id":48228973412606,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Customs \/ Superlight","offer_id":48228973445374,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 28\/28 \/ Standard","offer_id":48190936514814,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 28\/28 \/ Superlight","offer_id":48190936547582,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 32\/32 \/ Standard","offer_id":48228973478142,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 32\/32 \/ Superlight","offer_id":48228973510910,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Customs \/ Standard","offer_id":48228973543678,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Customs \/ Superlight","offer_id":48228973576446,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 28\/28 \/ Standard","offer_id":48190936613118,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 28\/28 \/ Superlight","offer_id":48190936645886,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 32\/32 \/ Standard","offer_id":48228973609214,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 32\/32 \/ Superlight","offer_id":48228973641982,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Customs \/ Standard","offer_id":48228973674750,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Customs \/ Superlight","offer_id":48228973707518,"sku":null,"price":430.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/bola_hooked_carbon_bike_rims.png?v=1780298314","url":"https:\/\/bolacarbon.com\/products\/bola-27-5er-carbon-mtb-downhill-rim-40mm-outer-32mm-inner-wide-30mm-high-for-dh","provider":"Bola Carbon Wheelset ","version":"1.0","type":"link"}