FSA KFX i28 29" Wheel World Championship carbon, built by hand. The FSA KFX i28 is a race-bred carbon wheel developed in collaboration with the Cannondale Factory Racing team and proven at the highest level of XC competition, including a World Championship win. Every wheel is handcrafted in-house with a variable height carbon rim that balances strength with vertical compliance, and a hookless bead tubeless-compatible asymmetric rim profile for a secure, airtight fit. FSA's PRS hub system delivers faster engagement for snappier acceleration out of corners, while a 28mm internal width suits the wider tire volumes that modern XC and marathon racing demands. Features Variable height carbon rim delivers an optimal combination of durability, strength, and vertical compliance for XC, XCO, and marathon racing Hookless bead tubeless-compatible asymmetric carbon rim with a 25mm depth, 33mm outer width, and 28mm internal width PRS alloy hub system provides faster engagement for more responsive acceleration and precise power transfer Artisan built, entirely by hand with 2-cross double butted spokes and brass nipples for precise, reliable wheel builds7 sealed cartridge bearings (2 front, 5 rear) for smooth, long-lasting hub performance ISO 6-bolt rotor mount compatible with standard disc brake rotors Available in Micro Spline and SRAM XD freehub options to suit Shimano 12-speed and SRAM 12-speed drivetrain configurations SPECIFICATIONSWheel Size29"Rim Material Carbon Fiber Rim Depth25mm Rim Width (outer)33mm Internal Width28mm Rim Type Hookless, tubeless compatible, asymmetric Front Axle15x110mm thru-axle (Boost)Rear Axle12x148mm thru-axle (Boost)Rotor Mount6-bolt Freehub Options Shimano Micro Spline 12-speed, SRAM XD 12-speed Spoke Pattern2-cross double butted with brass nipples Bearings7 sealed cartridge (2F / 5R)Pair Weight1, 566g Intended Use XC, XCO, Marathon | Fsa | Kfx I28 29" Wheel Rear, 12X148Mm, 6-Bolt, Microspline | Aluminum