Lightweight carbon wheelset for Cross Country, Marathon, and Trail.
The FSA KFX I25 Carbon wheelset 29" combines low weight, high stiffness, and modern Boost standards to create a high-performance wheelset for ambitious mountain bikers. The hand-built carbon rims with a 25 mm internal width and asymmetric profile provide optimal spoke tension, high stability, and precise handling.
The high-quality P.R.A. aluminum hubs with 7 sealed industrial bearings and a 6-pawl freehub ensure reliable, smooth operation. Thanks to Tubeless Ready and the Boost axle standard, the wheelset is ideal for modern cross-country, marathon, and trail bikes.
Highlights:
- Carbon rims: low weight with high stiffness.
- Asymmetric rim profile: more even spoke tension and greater stability.
- 25 mm internal width: ideal for modern MTB tires.
- Tubeless Ready: fewer flats and more grip.
- Hand-built: fully assembled and trued by hand.
Technical data:
- Manufacturer: FSA
- Model: KFX I25 Carbon
- Area of use: Cross Country, Marathon, Trail
- Wheel size: 29 inch
- ETRTO: 622 x 25
- Recommended tire width: 29-71 mm (1.14-2.80 inch)
- Rim material: Carbon
- Rim height: 30 mm
- Internal width: 25 mm
- External width: 30 mm
- Rim profile: asymmetrical
- Rim type: Hookless
- Tubeless Ready: Yes
- Front wheel axle: 15x110 mm Boost
- Rear wheel axle: 12x148 mm Boost
- Disc brake mount: 6-bolt disc
- freehub: SRAM XD 11-/12-speed
- Freehub system: Aluminum freehub body with 6 pawls
- Spokes: double-butted aero steel spokes
- Nipples: Brass
- Bearings: 7 sealed industrial bearings
- Color: Black
- Weight: approx. 1,566 g / pair
Convertible to
- Shimano Microspline: FSA part number 752-0784000000 (sold separately)
Included in delivery:
- 1x FSA KFX Carbon wheelset (front and rear wheel)
- 1 pair of tubeless valves
- FSA Tubeless rim tape
- Spoke protector
Manufacturer part no.: FSA KFX i25 700C /29” Boost148 Centerlock WH-TX-923-9/148CL EAN: 4710243886618
“Extremely lightweight, handcrafted, and uncompromisingly stiff – the high-end carbon wheelset for modern XC and trail bikes.”
SKU: V4A1
FSA KFX i25 Carbon | Wheelset 29" | 6-bolt disc | Boost 15x110 / 12x148 mm | SRAM XD
Does this wheel fit your bike?
Video and FAQ on axle dimensions, freehub, and brake disc mount.
Lightweight carbon wheelset for Cross Country, Marathon, and Trail.
The FSA KFX I25 Carbon wheelset 29" combines low weight, high stiffness, and modern Boost standards to create a high-performance wheelset for ambitious mountain bikers. The hand-built carbon rims with a 25 mm internal width and asymmetric profile provide optimal spoke tension, high stability, and precise handling.
The high-quality P.R.A. aluminum hubs with 7 sealed industrial bearings and a 6-pawl freehub ensure reliable, smooth operation. Thanks to Tubeless Ready and the Boost axle standard, the wheelset is ideal for modern cross-country, marathon, and trail bikes.
Highlights:
- Carbon rims: low weight with high stiffness.
- Asymmetric rim profile: more even spoke tension and greater stability.
- 25 mm internal width: ideal for modern MTB tires.
- Tubeless Ready: fewer flats and more grip.
- Hand-built: fully assembled and trued by hand.
Technical data:
- Manufacturer: FSA
- Model: KFX I25 Carbon
- Area of use: Cross Country, Marathon, Trail
- Wheel size: 29 inch
- ETRTO: 622 x 25
- Recommended tire width: 29-71 mm (1.14-2.80 inch)
- Rim material: Carbon
- Rim height: 30 mm
- Internal width: 25 mm
- External width: 30 mm
- Rim profile: asymmetrical
- Rim type: Hookless
- Tubeless Ready: Yes
- Front wheel axle: 15x110 mm Boost
- Rear wheel axle: 12x148 mm Boost
- Disc brake mount: 6-bolt disc
- freehub: SRAM XD 11-/12-speed
- Freehub system: Aluminum freehub body with 6 pawls
- Spokes: double-butted aero steel spokes
- Nipples: Brass
- Bearings: 7 sealed industrial bearings
- Color: Black
- Weight: approx. 1,566 g / pair
Convertible to
- Shimano Microspline: FSA part number 752-0784000000 (sold separately)
Included in delivery:
- 1x FSA KFX Carbon wheelset (front and rear wheel)
- 1 pair of tubeless valves
- FSA Tubeless rim tape
- Spoke protector
Manufacturer part no.: FSA KFX i25 700C /29” Boost148 Centerlock WH-TX-923-9/148CL EAN: 4710243886618
“Extremely lightweight, handcrafted, and uncompromisingly stiff – the high-end carbon wheelset for modern XC and trail bikes.”
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F.S.A. S.R.L. / Full Speed Ahead develops precision bicycle components, including cranksets, cockpits, headsets, wheels, and drivetrain parts built for efficient performance. The brand stands out for combining Italian cycling heritage with modern engineering for road, gravel, mountain, and e-bike riders.
Via Francesco Petrarca. 4
20123 Milan
Italy Email: info@fullspeedahead.com Phone: +39 039 688 52 65 Website: http://www.fullspeedahead.com/