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  • Shimano - Ultegra SM-RT800 Disc Rotor - Gray
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  • Shimano - Ultegra SM-RT800 Disc Rotor - Gray

Shimano Ultegra SM-RT800 Disc Rotor

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sale $49.95 $58.99

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    • Gray, Centerlock 160mm
      sale $49.95
    • Gray, Centerlock 140mm
      sale $49.95

    3 Reviews


    A road brake stalwart.

    It's hard to argue with the improves power and all-weather performance that disc brakes bring to road cycling. It’s a given in other cycling disciplines and we have already started to see some big names get important race victories aboard disc brake bikes. Shimano's Ultegra SM-RT800 Disc Rotors feature Freeza technology to cope with the sustained braking and higher temps associated with road cycling. This centerlock rotor continues Shimano's trickle-down technology from Dura Ace that further advances the Ultegra range.

    Ice-Tech Frezza refers to the hybrid 3-layer sandwich construction of steel and aluminum. The stainless steel adds durability and consistent braking at the surface while the aluminum drops weight and helps dissipate the heat that can build up on long technical descents by up to 50-degrees Fahrenheit. When paired with Ice-Tech pads, temps that would normally be in the 400-degree range operate at a much lower 300-degree number. Lower temperatures improve braking performance and prevent fade for more confident descending.

    The rotors are available in 140 and 160mm diameters and include a lockring.

    • Disc road rotor that adds powerful stopping in all conditions
    • Inner-aluminum core for maximum heat dissipation
    • Available in 140 and 160mm options
    • Centerlock hub compatible
    • Includes lockring
    • Item #SHI00G6

    Tech Specs

    aluminum, stainless steel
    Attachment Type
    140, 160mm
    Claimed Weight
    [140mm] 106g, [160mm] 127g
    Recommended Use
    cyclocross, gravel, road cycling, triathlon
    Manufacturer Warranty
    2 years

    Tech Specs

    • Reviews
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    Roadie Rotors

    • Familiarity: I've put it through the wringer

    Gone are the days when one had to defile their skinny-tire rig with mountain bike rotors. While a rotor is, ostensibly, a rotor, these feature fins that increase heat dissipation, and improve the aerodynamic profile (they also look ballin').

    Feel free to let me know if you have any questions. I can be reached at

    Unanswered Question

    Is there a 6 bolt equivalent to this rotor? I have switched wheelsets and need a 6 bolt rotor that is compatible with the Ultegra calipers. Thanks.