​FSA KFX i30: New carbon XC wheels – World Cup-level speed at just 1,250 grams

These days, it’s rare to earn early acclaim. Yet the prototypes of the new FSA KFX i30 wheels had already enjoyed considerable success even before their official market launch. According to FSA, they were used, amongst other things, in Alan Hatherly and Luca Martin’s World Championship victories. FSA has closely coordinated the development of the new KFX i30 with top-level athletes. In particular, the Cannondale Factory Racing and Lapierre Factory Racing teams provided ongoing feedback from training and competition.

Lightweight with a 30-millimetre internal width

With a system weight of just 1,250 grams per wheelset, the KFX i30 is clearly positioned in the high-end segment of modern XC wheels. At the same time, FSA has opted for an inner width of 30 millimetres, which is virtually ideal by today’s standards. This combination is said to offer two key advantages: modern XC tyres are optimally supported, and the contact patch is increased, delivering greater traction. FSA promises greater control and cornering stability, particularly on loose surfaces, over roots and on technical World Cup courses. At the same time, lower tyre pressures are said to be possible without the tyre feeling spongy.

Asymmetrical rim for greater stability

A key feature of the KFX i30 is its asymmetrical carbon rim. The offset positioning of the spoke bed is designed to better balance the spoke tensions on the drive and non-drive sides. According to FSA, the result is a more stable wheel assembly with greater durability and improved tracking. Put simply, this means:

• greater stability in tight corners
• better line choice in technical sections
• less maintenance required due to more stable spoke tension

New PRS hub with 72 teeth

When it comes to the rear wheel hub drive system, FSA relies on the new PRS Ratchet Platform. Inside, there is a 72-tooth ratchet system, which is designed to enable particularly quick engagement. The high number of engagement points improves power transfer, particularly during short sprints, technical climbing sections or explosive accelerations out of bends. In addition, FSA fits seven sealed industrial bearings and a 6-hole brake disc mount

Direct-mount spokes and ABS nipples

FSA also takes a consistent approach to spoke lacing. Direct-pull aero spokes are used, which do away with traditional J-bends. This is intended to reduce stress peaks and improve power transfer. Another detail is the Alpina ABS nipples. The Anti-Blocking System utilises a self-locking design intended to prevent twisting or spontaneous loosening. FSA expects this to result in longer-lasting truing, less re-truing and reduced maintenance requirements during racing.

Rim profile to prevent punctures

As well as weight and stiffness, durability also played a major role in the development. FSA refers to a specially optimised rim profile designed to better absorb hard impacts and reduce the risk of punctures. Added to this is a special rim flange design intended to help prevent so-called pinch flats.

Modern XC trails in particular – with their rocky sections, drops and high speeds – now call for significantly more robust wheels than was the case just a few years ago.

Lifetime guarantee

FSA is particularly confident when it comes to quality. The KFX i30 is produced entirely in-house. Both the carbon rims and the hubs are manufactured in-house and are then assembled by hand. As a testament to this commitment to quality, FSA includes the wheelset in its Lifetime Warranty programme.

FSA KFX i30 – Information & Price

• Carbon wheelset for XC, XCO and marathon
• Weight: 1,250 g per set
• Asymmetrical carbon rim with a hookless tubeless design
• 30 mm internal width / 36 mm external width
• Direct-Pull Aero spokes and Alpina ABS nipples
• PRS hub with 72-tooth ratchet
• 7 industrial sites turned into poetry venues
• Compatible with Microspline and XD
• ISO 6-hole mounting
• Lifetime guarantee
• Price: 2,189 euros

Conclusion from an editor’s perspective

The new KFX i30 shows the direction in which modern XC wheelsets are heading. A purely lightweight design philosophy is increasingly taking a back seat. Instead, the focus is shifting more towards traction, control and technical downhill performance. With a 30-millimetre internal width, an asymmetrical rim design and a fast 72-tooth ratchet, FSA is following this trend to the letter. At the same time, the weight remains at an absolutely top-class level of 1,250 grams.

The combination of low weight and excellent trail performance is particularly appealing. This means the wheelset is aimed not only at traditional XCO racers, but also at ambitious marathon riders and modern downcountry riders.