{"product_id":"29er-hookless-carbon-tubeless-mtb-rim-20mm-profile-29mm-inner-width-offset-325-370g-xc-am","title":"29er Hookless Carbon Tubeless MTB Rim – 20mm Profile, 29mm Inner Width, Offset, 325–370g (XC\/AM)","description":"\u003ch2\u003e29er Hookless Carbon Tubeless MTB Rim — 20mm Profile, 29mm Inner Width, Offset Design\u003c\/h2\u003e\u003cp\u003eA hookless, tubeless-ready 29er carbon rim weighing \u003cstrong\u003e325–370g per piece\u003c\/strong\u003e, built for cross-country (XC) and all-mountain (AM) riding. The 29mm inner width accommodates 2.3–2.6\" tires at recommended pressures of \u003cstrong\u003e45–65 psi\u003c\/strong\u003e, and the asymmetric (offset) spoke bed improves tension balance on the drive side by evening spoke angles across the wheel.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Diameter\u003c\/td\u003e\n\u003ctd\u003e29\" (622mm BSD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Profile (Height)\u003c\/td\u003e\n\u003ctd\u003e20mm (low profile)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e35mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e29mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e598mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight — Standard\u003c\/td\u003e\n\u003ctd\u003e370g ±15g per rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight — Superlight\u003c\/td\u003e\n\u003ctd\u003e325g ±10g per rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Shape\u003c\/td\u003e\n\u003ctd\u003eU-shape (hookless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBead Type\u003c\/td\u003e\n\u003ctd\u003eHookless (tubeless only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e6.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e4.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e7.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Direction\u003c\/td\u003e\n\u003ctd\u003eLeft 5° \/ Right 7° (offset; customizable)\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\u003ctr\u003e\n\u003ctd\u003eTire Pressure Range\u003c\/td\u003e\n\u003ctd\u003e45 psi (min) – 65 psi (max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eStructural Strength Testing Results\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForward Compressive Strength:\u003c\/strong\u003e \u0026gt;300kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLateral Torsion Resistance:\u003c\/strong\u003e \u0026gt;50kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Hole Tension:\u003c\/strong\u003e \u0026gt;280kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Equilibrium (imbalance):\u003c\/strong\u003e \u0026lt;3g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlatness Tolerance:\u003c\/strong\u003e \u0026lt;0.15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoundness Tolerance:\u003c\/strong\u003e \u0026lt;0.3mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRide Discipline Fit\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-Country (XC):\u003c\/strong\u003e The superlight 325g option and low 20mm profile minimize rotational weight, reducing energy cost on climbs. Pairs well with 2.2–2.4\" XC tires at 50–65 psi.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-Mountain (AM):\u003c\/strong\u003e The 29mm inner width supports high-volume 2.4–2.6\" casings for better cornering stability and compliance on technical terrain. Recommended tire pressure: 45–52 psi.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHookless vs. Hooked Rim — Key Tradeoffs\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eHookless (this rim)\u003c\/th\u003e\n\u003cth\u003eHooked\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBead compatibility\u003c\/td\u003e\n\u003ctd\u003eTubeless-only tires (check tire manufacturer approval)\u003c\/td\u003e\n\u003ctd\u003eTubeless and clincher\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum tire pressure\u003c\/td\u003e\n\u003ctd\u003e65 psi (as specified)\u003c\/td\u003e\n\u003ctd\u003eTypically higher (varies)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim wall weight\u003c\/td\u003e\n\u003ctd\u003eLower (no bead hook machining)\u003c\/td\u003e\n\u003ctd\u003eHigher\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim structural integrity\u003c\/td\u003e\n\u003ctd\u003eRequires tubeless-rated tires for safe seating\u003c\/td\u003e\n\u003ctd\u003eCompatible with wider tire range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eNote: Hookless rims require tubeless-compatible tires. Always verify tire manufacturer's hookless approval before mounting. Maximum tire pressure is 65 psi; exceeding this risks bead failure.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eOffset (Asymmetric) Rim Design\u003c\/h2\u003e\u003cp\u003eThe spoke holes are laterally offset (Left 5° \/ Right 7°) rather than centered on the rim centerline. On a rear wheel, this reduces the tension differential between the drive-side and non-drive-side spokes, producing a more evenly tensioned, laterally stiffer wheel. This is particularly beneficial on 12-speed drivetrains where the cassette forces a steeper drive-side spoke angle.\u003c\/p\u003e\u003ch2\u003eWarranty \u0026amp; Quality\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3-year manufacturer warranty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Manufactured in China by a dedicated carbon rim production facility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e Hole diameters (valve, spoke, assembly) and nipple offset angles available as custom orders — contact seller before purchase\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Is a 29mm inner width carbon rim suitable for all-mountain riding with 2.4\" tires?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: Yes. A 29mm inner width is well within the recommended range for 2.4\" MTB tires (ETRTO recommends an inner width 25–35% of the tire's nominal width). The wider bed improves tire casing support and cornering stability compared to a 25mm rim.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What tire pressure should I run on a hookless rim?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: This rim is rated for 45–65 psi. Most AM\/XC tubeless setups run 38–55 psi depending on rider weight and terrain. Do not exceed 65 psi on this hookless rim.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Can I use a tube with this hookless rim in an emergency?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: Hookless rims are not designed for inner tubes. In a field emergency, some riders briefly use a tube at very low pressure to reach safety, but this is not manufacturer-approved and carries a risk of bead unseating.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: How does the offset spoke pattern help on a 29er rear wheel?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: The asymmetric hole position shifts the rim's spoke flange reference point, reducing the tension imbalance between drive and non-drive sides. This results in fewer broken spokes and improved lateral rigidity under load.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What is the difference between the standard (370g) and superlight (325g) versions?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: The superlight variant uses a refined carbon layup with tighter tolerances (±10g vs. ±15g), reducing weight by approximately 45g per rim (90g per wheelset). For weight-focused XC racing, the superlight option is recommended; for heavier AM use, the standard version offers a more conservative safety margin.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"29\\\" extralight MTB hookless carbon tubeless offset rims 20mm low profile 29mm inner wide for XC or AM Bola\",\n  \"description\": \"29er Hookless Carbon Tubeless MTB Rim — 20mm Profile, 29mm Inner Width, Offset Design A hookless, tubeless-ready 29er carbon rim weighing 325–370g per piece , built for cross-country (XC) and all-mountain (AM) riding. The 29mm inner width accommodates 2.3–2.6\\\" tires at recommended pressures of 45–65 psi , and the asymmetric (offset) spoke bed improves tension balance on the drive side by evening spoke angles across the wheel. Key Specifications Specification Value Rim Diameter 29\\\" (622mm BSD) Rim Profile (Height) 20mm (low profile) Outer Width 35mm Inner Width 29mm ERD 598mm Weight — Standard 370g ±15g per rim Weight — Superlight 325g ±10g per rim Rim Shape U-shape (hookless) Bead Type Hookless (tubeless only) Valve Hole Diameter 6.5mm (customizable) Spoke Hole Diameter 4.5mm (customizable) Assembly Hole Diameter 7.5mm (customizable) Nipple Direction Left 5° \/ Right 7° (offset; customizable) Max Rider Weight 100kg Tire Pressure Range 45 psi (min) – 65 psi (max) Structural Strength Testing Results Forward Compressive Strength: \u0026gt;300kg Lateral Torsion Resistance: \u0026gt;50kg Spoke Hole Tension: \u0026gt;280kg Dynamic Equilibrium (imbalance): \u0026lt;3g Flatness Tolerance: \u0026lt;0.15mm Roundness Tolerance: \u0026lt;0.3mm Ride Discipline Fit Cross-Country (XC): The superlight 325g option and low 20mm profile minimize rotational weight, reducing energy cost on climbs. Pairs well with 2.2–2.4\\\" XC tires at 50–65 psi. All-Mountain (AM): The 29mm inner width supports high-volume 2.4–2.6\\\" casings for better cornering stability and compliance on technical terrain. Recommended tire pressure: 45–52 psi. Hookless vs. Hooked Rim — Key Tradeoffs Feature Hookless (this rim) Hooked Bead compatibility Tubeless-only tires (check tire manufacturer approval) Tubeless and clincher Maximum tire pressure 65 psi (as specified) Typically higher (varies) Rim wall weight Lower (no bead hook machining) Higher Rim structural integrity Requires tubeless-rated tires for safe seating Compatible with wider tire range Note: Hookless rims require tubeless-compatible tires. Always verify tire manufacturer's hookless approval before mounting. Maximum tire pressure is 65 psi; exceeding this risks bead failure. Offset (Asymmetric) Rim Design The spoke holes are laterally offset (Left 5° \/ Right 7°) rather than centered on the rim centerline. On a rear wheel, this reduces the tension differential between the drive-side and non-drive-side spokes, producing a more evenly tensioned, laterally stiffer wheel. This is particularly beneficial on 12-speed drivetrains where the cassette forces a steeper drive-side spoke angle. Warranty \u0026amp; Quality Warranty: 3-year manufacturer warranty Origin: Manufactured in China by a dedicated carbon rim production facility Customization: Hole diameters (valve, spoke, assembly) and nipple offset angles available as custom orders — contact seller before purchase Frequently Asked Questions Q: Is a 29mm inner width carbon rim suitable for all-mountain riding with 2.4\\\" tires? A: Yes. A 29mm inner width is well within the recommended range for 2.4\\\" MTB tires (ETRTO recommends an inner width 25–35% of the tire's nominal width). The wider bed improves tire casing support and cornering stability compared to a 25mm rim. Q: What tire pressure should I run on a hookless rim? A: This rim is rated for 45–65 psi. Most AM\/XC tubeless setups run 38–55 psi depending on rider weight and terrain. Do not exceed 65 psi on this hookless rim. Q: Can I use a tube with this hookless rim in an emergency? A: Hookless rims are not designed for inner tubes. In a field emergency, some riders briefly use a tube at very low pressure to reach safety, but this is not manufacturer-approved and carries a risk of bead unseating. Q: How does the offset spoke pattern help on a 29er rear wheel? A: The asymmetric hole position shifts the rim's spoke flange reference point, reducing the tension imbalance between drive and non-drive sides. This results in fewer broken spokes and improved lateral rigidity under load. Q: What is the difference between the standard (370g) and superlight (325g) versions? A: The superlight variant uses a refined carbon layup with tighter tolerances (±10g vs. ±15g), reducing weight by approximately 45g per rim (90g per wheelset). For weight-focused XC racing, the superlight option is recommended; for heavier AM use, the standard version offers a more conservative safety margin.\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Carbon Fiber Sporting Goods\"\n  },\n  \"image\": [\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/MTB35-C20-29_8e1d2643-cb3c-4ac6-8403-7047732cd0f9.jpg?v=1714112112\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/1_a1d02965-4e5e-4455-b5be-bfd036449988.png?v=1714112112\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/hookless_5f5ffd98-599b-4960-ab3f-a605a49bd206.jpg?v=1714112112\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/redbola_00ad45a5-534a-4e3b-9927-1183b29426a4.jpg?v=1714112112\",\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0634\/8492\/0062\/files\/whitebola_1ca9877b-01cb-4763-b234-68b789cda288.jpg?v=1714112112\",\n    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