AX Lightness Ultra 28C clincher disc road wheelset TL-Ready

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  • Ultra Disc 28C TLR

    Ultra Disc 28C TLR - A completely new development! Thanks to a CfD-optimized rim profile our ax 28C TLR Clincher rims offer an exceptional aero performance that matches those of significantly deeper rims.

    The low weight, which so far has only been reserved for tubular rimsm makes them miraculous accelerators and very reactive. The high stability is responsible for not wasting a single bit of energy or and a high steering precision.

    The massive width of 26 mm is responsible for a high stability and stifness. The huge internal width of 16.5 mm allows the tire to evolve in a very advantageous shape that not only allows to ride with a lower pressure without bulking under load or in corners, but at the same time increases the comfort and yields a reduction in rolling resistance.

    Our new 2018 version makes use of a completely re-designed rim bed and therewith also allows the use of tubeless tires (TLR). The pronounced hooks lock the tires firmly in place and allow for an easy installation and sealing.
    The wheels are factory shipped with tubeless tape - of course as before they are also compatible with conventional tire/tube combinations for a maximum flexibility.

    Our road clincher rims have already proven their extreme strength by winning the latest carbon wheel test shootout in Tour-Magazin (Tour 10/2017) - being one of only five of the 22 tested sets to pass the impact testing, yet by far the lightest.

    Each rim us individually tested at a tire pressure of 12 bar prior to dispatch which is a testament to their extreme stability.

    All of this make the Ultra Disc 28C TLR to the absolute king of mountain!


    Specifications - Ultra Disc 28C TLR
    Weight (+/- 5 %)1200 g/set
    Rimsax 28C TLR
    Rim materialFull Carbon
    Tire typeClincher: Tubeless tires or conventional tire/tube combos
    Brake typeDisc brake - 6-Bolt
    Rim depth28 mm
    Rim width26 mm
    Rim internal width16.5 mm
    HubsExtralite CyberHubs SPD-2
    Freehub bodyShimano/Sram, Campagnolo
    Axle standard frontQR or 12 mm thru-axle
    Axle standard rearQR or 142x12 thru-axle
    SpokesDT Swiss Aerolite, black
    NippleDT Swiss Pro Lock hidden, internal
    Spoke tensionfront: 100 kgf, rear driveside: 140 kgf
    Spoke count (f/r)24 / 24
    Field of useRoad
    Rider weight limit100 kg
    Finish3K
    Decal colourwhite
    Recommended tire widths23-28mm
    Max. recommended tire pressure23mm 7.5bar; 25mm 7.25bar; 28mm 7.0bar



    Laminated spoke holes

    Instead of simply drilling the spoke holes of our rims, we take a different approach with our rims: Every single spoke hole is crafted by hand and reinforced with strategically placed reinforcement patches.
    The advantage is obvious: Where carbon is being drilled, one inevitably also cuts through fibres. A continuous fibre flow however is essential for the material to play its advantages such as the high tensile strength, even more indispensable for nipple holes that are exposed to high spoke tensions. Specifically crafted nipple seats allow an optimal orientation of the nipples and at the same time distribute the occurring forces evenly into the rim bed.

    Independent testing at an university lab has confirmed the performance of this time and labour intensive approach: The rim is capable of withstanding nipple pulling forces of over 5000 N - circa twice as much as the best competitor and more than every hub flange or spoke would be able to endure. As a result our rims do not carry any spoke tension limit!

    Us ourselves we are building our wheels with up to 140 kg of a spoke tension: A guarantor for you to have long-lasting joy with your wheels. The higher the spoke tension, the lesser the opportunity for a spoke to be unloaded upon an overload of the wheels (e.g. from a compression such as an obstacle, pothole or anything alike) and the wheels to therewith come out of true. That way you are longer able to ride with your perfectly trued wheels. As an additional advantage there also is minor increase in stiffness to be recorded.
    An effort that pays off!

    Extralite CyberHubs SPD-2 / CeramicSpeed Ceramic-option

    Our Ultra wheelset invariably rely on high performance hubs from Extralite. The Italian lightweights are some of the lightest hubs on the market. An intelligent, elaborate construction by means of FEM-analyses are a guarantor for a high durability, reasonable features such as an adjustable bearing play a high suitability for daily use.
    The new CyberHubs SPD-2 now also offer the option of a compatibility and easy conversion between quick release and 12mm thru-axle interfaces.

    New for 2017 we optionally offer our Ultra wheels with Ceramic hybrid bearings. As we do not settle with the second best, we only offer the highest quality of bearings from CeramicSpeed. The Danish specialists are renowned as the nonplusultra for years and have wins in about every single race globally available in their palmares.

    Hand-built

    All of our wheelsets are individually built by hand in our manufacture in Creußen, Bayern, to the tightest tolerances and with extremely high spoke tension. We refrain from the use of wheel building machines and invariably trust on the craftsmanship of specially qualified mechanics. The high experience with high-end-material allows a consistently high quality, the tight tolerance in lateral runout and radial runout a perfect runout and therewith a lot of joy with the wheels.
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