{"product_id":"asymmetric-carbon-29er-mtb-rim-23mm-high-26mm-inner-width-xc-trail-300-370g-bola","title":"Asymmetric Carbon 29er MTB Rim – 23mm High, 26mm Inner Width, XC \u0026 Trail, 300–370g (Bola)","description":"\u003ch2 id=\"tinymce_scroll_sign\"\u003eExplore the Performance of the Asymmetric Carbon 29er MTB Rim\u003c\/h2\u003e\n\u003cp\u003eThis asymmetric carbon rim delivers a \u003cstrong\u003e23mm profile height\u003c\/strong\u003e and \u003cstrong\u003e26mm inner width\u003c\/strong\u003e in a 29-inch format, purpose-built for cross-country racing and all-mountain trail riding. Available in three weight tiers: \u003cstrong\u003eNormal (370 ±15g)\u003c\/strong\u003e, \u003cstrong\u003eSuperlight (325 ±10g)\u003c\/strong\u003e, and \u003cstrong\u003eUltralight (300 ±10g)\u003c\/strong\u003e per rim.\u003c\/p\u003e\n\u003ch2\u003eKey Specifications\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 Size\u003c\/td\u003e\n\u003ctd\u003e29er (ERD: 589mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Profile Height\u003c\/td\u003e\n\u003ctd\u003e23mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e26mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Shape\u003c\/td\u003e\n\u003ctd\u003eU-shape (asymmetric)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight — Normal\u003c\/td\u003e\n\u003ctd\u003e370 ±15g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight — Superlight\u003c\/td\u003e\n\u003ctd\u003e325 ±10g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight — Ultralight\u003c\/td\u003e\n\u003ctd\u003e300 ±10g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForward Compressive Strength\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;300kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLateral Torsion Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;50kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Tension Strength\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;280kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic Equilibrium\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlatness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoundness Tolerance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Angle\u003c\/td\u003e\n\u003ctd\u003eLeft 5°, Right 7° (or custom)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e6.5mm (or custom)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e4.5mm (or custom)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e7.5mm (or custom)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTire Pressure Range\u003c\/td\u003e\n\u003ctd\u003e45–65 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Rider Weight\u003c\/td\u003e\n\u003ctd\u003e100kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eDesign Rationale: Why Asymmetric?\u003c\/h2\u003e\n\u003cp\u003eThe asymmetric spoke bed offsets the spoke holes to equalise tension between drive-side and non-drive-side spokes. This reduces the spoke tension differential — a known cause of wheel fatigue and spoke breakage — resulting in a more durable, more evenly loaded wheel structure. The 26mm inner width accommodates 2.2–2.6-inch tubeless tires with an optimal casing spread for grip and rolling efficiency on XC and trail terrain.\u003c\/p\u003e\n\u003ch2\u003eWeight Tier Comparison\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTier\u003c\/th\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003cth\u003eTradeoff\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNormal\u003c\/td\u003e\n\u003ctd\u003e370 ±15g\u003c\/td\u003e\n\u003ctd\u003eEnduro, aggressive trail, heavier riders\u003c\/td\u003e\n\u003ctd\u003eHeavier, but maximises structural margin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuperlight\u003c\/td\u003e\n\u003ctd\u003e325 ±10g\u003c\/td\u003e\n\u003ctd\u003eAll-mountain, trail racing\u003c\/td\u003e\n\u003ctd\u003eBalanced weight-to-durability ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltralight\u003c\/td\u003e\n\u003ctd\u003e300 ±10g\u003c\/td\u003e\n\u003ctd\u003eXC racing, weight-optimised builds\u003c\/td\u003e\n\u003ctd\u003eThinner layup; suits riders under 75kg and smoother XC trails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: The Ultralight variant is optimised for competitive XC use. Riders above 80kg or riding highly technical, rock-heavy terrain are advised to select the Normal or Superlight tier to maintain structural safety margins.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eCustomisation Options\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSpoke hole count: configurable on request\u003c\/li\u003e\n\u003cli\u003eValve hole diameter: 6.5mm standard or custom\u003c\/li\u003e\n\u003cli\u003eSpoke hole diameter: 4.5mm standard or custom\u003c\/li\u003e\n\u003cli\u003eAssembly hole diameter: 7.5mm standard or custom\u003c\/li\u003e\n\u003cli\u003eNipple angle: Left 5° \/ Right 7° standard or custom\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat tire widths are compatible with this rim's 26mm inner width?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA 26mm inner width is ETRTO-compatible with 2.2–2.6-inch (56–66mm) mountain bike tires. It provides an optimal casing spread for both XC race and trail-oriented tires at 45–65 psi tubeless pressures.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the difference between the Ultralight and Normal weight versions?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe Ultralight (300 ±10g) uses a thinner carbon layup to reduce weight for XC racing. The Normal (370 ±15g) uses a thicker layup for greater impact resistance. Both share identical spoke tension strength (\u0026gt;280kg) and forward compressive strength (\u0026gt;300kg).\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eAre asymmetric rims worth it for 29er XC and trail builds?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. Asymmetric rims equalise drive-side and non-drive-side spoke tension, reducing fatigue-related spoke failure — a measurable advantage in 29er builds where the larger wheel diameter increases spoke tension variance.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs this rim tubeless-ready?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe U-shape profile and 6.5mm valve hole are compatible with tubeless setups. A tubeless rim tape and valve are required and not included.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat is the maximum rider weight?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe rated maximum rider weight is 100kg across all weight tiers. Riders approaching this limit are recommended to select the Normal weight variant for maximum structural margin.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes Bola offer a warranty on these rims?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. Bola provides a three-year warranty covering manufacturing defects on carbon rims.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eInnovative Asymmetric Design for Enhanced Strength\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe asymmetric carbon 29er MTB rim is engineered to provide superior wheel strength and durability. By offsetting the spoke bed, it balances spoke tension more evenly on both sides of the wheel, reducing stress and improving overall stability. This design advantage reduces the risk of rim deformation during aggressive trail and XC rides. Coupled with advanced carbon fiber technology, the rim offers a robust yet lightweight structure, ensuring you can ride hard without worrying about wheel performance. This innovation makes it a top choice for riders seeking reliability on demanding terrain.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eOptimal Dimensions for Versatile Trail and XC Riding\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWith a 23mm height and a 26mm inner width, this asymmetric carbon 29er MTB rim provides an ideal profile for mountain biking enthusiasts. The 26mm inner width accommodates a wide range of tire sizes, enhancing traction and control on varied surfaces. This balance ensures the rim can handle both cross-country speed and technical trail maneuvers effectively. Riders will appreciate the responsive handling and improved tire stability that these dimensions offer, allowing for confident riding in diverse conditions.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eLightweight Construction to Boost Performance\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWeighing between 300 and 370 grams, the asymmetric carbon 29er MTB rim is designed to reduce rotational weight, which directly improves acceleration and climbing efficiency. The use of premium carbon fiber materials ensures that the rim remains lightweight without compromising strength. Reduced weight also lowers rider fatigue during long rides and enhances bike agility. This rim is an excellent upgrade for riders seeking to optimize their bike’s performance on both competitive and recreational rides.\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 \/ Normal","offer_id":48129001586942,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 28\/28 \/ Superlight","offer_id":48129001619710,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 32\/32 \/ Normal","offer_id":48129001652478,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 32\/32 \/ Superlight","offer_id":48129001685246,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Customs \/ Normal","offer_id":48129001718014,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ Customs \/ Superlight","offer_id":48129001750782,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 28\/28 \/ Normal","offer_id":48129001783550,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 28\/28 \/ Superlight","offer_id":48129001816318,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 32\/32 \/ Normal","offer_id":48129001849086,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 32\/32 \/ Superlight","offer_id":48129001881854,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Customs \/ Normal","offer_id":48129001914622,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ Customs \/ Superlight","offer_id":48129001947390,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 28\/28 \/ Normal","offer_id":48129001980158,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 28\/28 \/ Superlight","offer_id":48129002012926,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 32\/32 \/ Normal","offer_id":48129002045694,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ 32\/32 \/ Superlight","offer_id":48129002078462,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Customs \/ Normal","offer_id":48129002111230,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Matt \/ Customs \/ Superlight","offer_id":48129002143998,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 28\/28 \/ Normal","offer_id":48129002176766,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 28\/28 \/ Superlight","offer_id":48129002209534,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 32\/32 \/ Normal","offer_id":48129002242302,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 32\/32 \/ Superlight","offer_id":48129002275070,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Customs \/ Normal","offer_id":48129002307838,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ Customs \/ Superlight","offer_id":48129002340606,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/bola_tubeless_carbon_rims_dbb71e39-931f-42f9-bc76-a1c42121f33e.png?v=1780298324","url":"https:\/\/bolacarbon.com\/es\/products\/asymmetric-carbon-29er-mtb-rim-23mm-high-26mm-inner-width-xc-trail-300-370g-bola","provider":"Bola Carbon Wheelset ","version":"1.0","type":"link"}