BA30 is the rim for high-impact riding when the trails are rough and rugged. With an internal bracing structure, the BA30 has torsional stiffness for directional control in demanding circumstances. It features a thick bead wall adjacent the tire to resist impact deformation, with a wider, rounded top-edge to reduce sidewall cuts. The nipple/spoke bed is oriented to the spoke direction to reduce weakness caused by bend in the spoke at the nipple hole. The BA30 is made with premium alloy, extruded with an internal brace profile and carefully formed for consistent shape. It is then fusion welded and ground for a strong precise finish. Chromag's fusion welding system leaves a perfect seamless joint that becomes the strongest section of the rim ensuring that your rim won’t split if you impact at the seam.

The rims are laced to the brand's new R4 hub. The R4 is designed to be a solid, reliable hub with a durable axle assembly and robust set of bearings. Chromag is using a tried and tested 4-pawl arrangement with 36 points of simultaneous engagement.

Specifications

Rim

• Rim: BA30
• Diameter: 27.5" // 29"
• ERD: 566mm // 604mm
• Internal Width: 30mm
• Spokes Count: 32
• Material: Premium extruded alloy
• Finish: Fusion welded seam-ground finish
• Profile: Internal bracing profile / Impact resistant design
• Tubeless Ready
• Valve: Presta
• Rim Weight: 611g (27.5") // 624g (29")

Hub

• Hub: R4
• Axle Diameter: 12mm
• Spacing: Boost 148mm
• Driver: XD // HG // MS
• Engagement: 4-pawl / 36 Point
• Spokes Count: 32