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Maximum aerodynamic performance with the widest operational range, the HADRON² Ultimate 625 aero wheels are designed for absolute maximum overall performance for road racing on any course profile.

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HADRON² Ultimate 625 Disc Brake

Maximum aerodynamic performance with the widest operational range, the HADRON² Ultimate 625 aero wheels are designed for absolute maximum overall performance for road racing on any course profile, as well as for unmatched all-wind condition performance in time trial and triathlon. The 20mm inner rim width is optimum for minimum rolling resistance with 25mm and 28mm tyres and remains compatible with even wider tyres. Available only in disc brake version. Full carbon clincher, tubeless ready construction. UCI approved. Including lifetime warranty for material and workmanship defects and a Fair-Share-Policy for any other riding damage.

Engineered with the continuous learning since Day-1 at Swiss Side, combining our latest aerodynamic research methods from our Formula 1 background and derived technologies. Compared to the HADRON Ultimate, this latest HADRON2 Ultimate rim shape reduces steering moment by a further 26% for increased stability in the windy and gusty conditions, whilst reducing the aero drag by a 10 - 20% depending on the rim depth, also thanks to the new Aerolite II spoke developed in collaboration with DT Swiss. Built with the latest top level 180 DICUT hub, SINC ceramic bearings and the highest quality production through our partnership with DT Swiss, there is zero compromise on performance and quality so you can set new personal best times on your favorite courses.

The SWISSSIDE HADRON DISC BRAKE is the perfect bike brake for every rider. Our SWISSSIDE HADRON DISC BRAKE was designed with riders in mind, and comes at an unbeatable price. The Ultimate Brake for All Conditions. Perfect for Road and Cyclocross Racing. You need a better bike brake. The SWISSSIDE HADRON DISC BRAKE is perfect for the avid cyclist, providing outstanding braking power and modulation. Buy now from Crank Masters Cycling Shop Online and visit our Cycling shop in UAE.


Front Wheel776g
Rear Wheel906g
Wheel Set1682g
Aero Profile Height62.5mm
Max. Rim Width30mm
Brake Track WidthN/A


Shimano 10, 11, 12 speed freehub as standard. Also SRAM 10, 11 speed compatible. Free hub kits are available for order separately: Campagnolo 10,11,12 speed, Campagnolo N3W 13-speed, and 12-speed XDR Driver.


DT Swiss 180 DICUT to Swiss Side specification. Rear hub internals use 240s ratchet system in 180 DICUT hub shell, except for DISC rear wheel which uses the Ratchet EXP system. Disc Brake Interface: Disc Center Lock; Axle System as delivered: 12 x 100mm thru axle front; 12 x 142mm thru axle rear; Disc brake wheel hubs are also supplied with interchangeable end caps for 5mm x 100mm disc brake QR front axle, and 5mm x 135mm disc brake QR rear axle. For DISC Rear Wheel: DT Swiss 180 DICUT, 36T Ratchet EXP. Disc Brake Interface: Disc Center Lock; 12/142mm Axle System.


  • DT Swiss Aerolite II spokes and Aero Comp II Straightpull spokes with DT Swiss pro lock hidden aluminium nipples.

  • Front Disc Brake (2-cross pattern): 24 spokes.

  • Rear Disc Brake (2-cross pattern): 24 spokes.


  • SINC ceramic bearings

  • Made of extremely tough and wear- and corrosion-resistant ceramic material

  • Reduces rolling resistance to absolute minimum

  • Guarantees greater durability than conventional ball bearings

Additional Info

Tyre Size

All tyres from 25mm to 64mm can be used on this rim. We recommend using a 25mm tyre on the front. If  additional comfort is desired, a 28mm tyre can be used  on the rear. We do not recommend tyres greater than 30mm width for maximimising aerodynamic performance

Rider Weight / Safety Notice

The maximum total system weight (bike + rider) for the HADRON² Ultimate disc brake wheelset is 110kg. Tyre pressures of 120psi should not be exceeded.