BOLA 32er 50mm Carbon Road & Gravel Rim | 38mm Outer, 32mm Inner, Tubeless Ready

Imagine rolling out for a long endurance ride where stability, tire volume, and aero efficiency matter equally. The BOLA 32er 50mm carbon rim is built to make modern road and gravel setups feel planted and confidence-inspiring whether you’re pushing pace on pavement or settling into a long mixed-surface ride.

The rim’s wide profile and tubeless-ready construction let you run higher-volume tires for comfort and traction while keeping aerodynamic benefits from the 50mm depth and asymmetric U-shaped profile.

BOLA 32er 50mm Carbon Road & Gravel Rim - Designed for versatile endurance and mixed-terrain performance

The blend of a 50mm rim depth with a 38mm external width and 32mm internal width (33mm on hookless versions) is focused on modern tire shapes and pressures: wider tires form a smooth, continuous aero transition across the rim and tire, reducing drag compared with narrow setups while improving ride compliance. Constructed from Toray T700 UD high-modulus carbon fiber, the rim family offers multiple layups to meet different weight and stiffness targets with options ranging from approximately 475g to 570g.

The rim is engineered for disc brake systems (compatible with both 6-bolt and Centerlock rotor standards), and meets ETRTO and ISO compliance standards with dynamic balance testing reported by the manufacturer. It includes a 3-year manufacturer warranty against defects excluding crash damage, providing a balance of factory-direct value and quality assurance for riders and builders.

Why it fits your routine

• Broad tire compatibility: Tubeless-ready and clincher capable, with recommended tire sizes of 28–32mm—ideal for endurance road setups and higher-volume gravel tires where comfort and rollover matter.
• Modern wide rim profile: 38mm outer width and 32mm internal width create a stable tire platform that improves handling, cornering control, and sidewall support at lower pressures.
• Aero and stability balance: 50mm rim depth and asymmetric U-shape profile deliver aerodynamic gains while promoting predictable crosswind behavior and stability on long rides.
• Material and build options: Toray T700 UD carbon construction with multiple layup choices gives builders the ability to prioritize lower weight or added durability depending on wheel-build goals.
• Disc brake focus: Designed specifically for disc brake systems (6-bolt & Centerlock), simplifying compatibility across modern road and gravel bike platforms.
• Industry compliance and testing: ETRTO and ISO compliance plus dynamic balance testing support reliable wheelbuilding and predictable service performance.
• Practical ERD and sizing: 32" (ISO 696mm BSD) rim size with an ERD of 602mm, allowing accurate spoke length calculations during wheel builds.
• Warranty coverage: 3-year manufacturer warranty provides reassurance for non-crash defects when the rim is used within recommended conditions.

Recommended use cases include upgrading to tubeless-ready aero wheels for endurance road cycling, building wide-internal wheels for modern gravel bikes, training or racing on mixed terrain with higher-volume tires, and stocking dependable carbon rims for retail or OEM builds where a mid-tier, factory-direct option is desired. The rim’s weight range and layup options make it adaptable for builders targeting different performance envelopes, while its wide internal width supports the trend toward larger-volume tires that increase comfort and traction without sacrificing aerodynamic advantages.