UltraRear SX 134gr.(20h)

Wheelbuilder's sweetest dream.

Weight: 20h/134gr. 24h/135gr. 28h/136gr.

Material: special AL7075TX & GRD5 Titanium.

External Bearings: 6803-SRS/6803-2RS ABEC5 cartridges.

Internal Bearings: 6903-SRS ABEC5 main axle & Ertalite® bushing.

Compatibity: Shimano/Sram, Campagnolo, 10&11 speed compatible.

Axle construction: multishaped 17mm milled to micro tolerances.

Body construction: 3D multiaxial machining all in 1 stage.

Finishing: black anodized body, "hart-coated" axle-ends.

Micro-tuner: quickest bearing preload system.

Freewheel: Hyper engineered 2pawls OR-Drive.

Graphics: laser etched.

Optional: ZeroUp-R hibrid-ceramic bearings.

Straight-pull performance with the easiness and all the advantages of regular spokes.

We designed UltraRear SX to use straight-pull spokes only where it's really necessary, the right side of road wheels have a critical camber and drives all the acceleration forces.

The use of regular spokes on rear left side allows you to build up wheel easily, without having to remove the axle or open the hub.

Straight pull spokes increase wheel stiffness under sprinting. They sensibly reduce lateral flex and increase torque transmission reactivity. All this come with a sensible weight reduction too.

Micro-tuner: our easy and quick external bearing preload system that ensures precise tuning, smooth running and no play at the rim.

Equipped with ABEC5 cartridge bearings featuring Grade 5 Cromium Steel Balls, 52100 Hi-Carbon Cromium Alloy Races, Nylon-Graphite Ball Retainers, Removable Snap Ring Seals. Fully serviceable.

Very light, weight nearly as hibrid ceramic versions.

Special low friction SRS axial seals on main hub bearings, 2RS protective seals on freewheel bearing.

Titanium ratchet wheel with a precise 30T pawl engaging system.

Camber details

To further optimize wheel stiffness we provide specific Campagnolo and Shimano/Sram axle-ends that are optimized around the cassette dimensions of each manufacturer standards.

The black finished "Extreme Camber" axle-ends allow Shimano/Sram setups to gain 1.5mm more camber on the drive side. This makes UltraRear SX equipped wheels at least 5% laterally stiffer than any other hub on the market.

Hi-performing custom wheels have never been that easy to build.

Here you find pre-calculated spoke lenghts, spoke patterns and wheel building tips.

As every Extralite products UltraHubs exceede UNI/DIN Safety standards. Safety tests simulate a very strong 90kg (200lb) rider output.

100% made in Italy