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SLF Motion Oversize-Hyper Speed System Black
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SLF Motion Oversize-Hyper Speed System

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SLF Motion Oversize-Hyper Speed System

Proven by the fastest Professional Triathletes in the world, including Tim Don / Ben Hoffman / Braden Currie / Lisa Roberts / and SO many more, it's no wonder why our Oversize Hyper Speed System is quickly becoming the "Go To" Oversize System on the market.

Utilizing the proprietary unique 14-Tooth/18-Tooth pulley wheel combination, the Oversize Hyper Speed System is designed to provide precise and repeatable shifting along with decreased drivetrain friction.

Locally produced aerospace grade carbon fiber cages, CNC machined anodized pulley wheels, and coated hybrid ceramic bearings all combine to provide the lowest friction possible along with durability that's unmatched.


  • Model 679 (Ultegra 6700/6800 and Dura Ace 7900/9000) - Compatible with cassettes up to 28T
  • Model 891 (Ultegra 8000/8050 and Dura Ace 9100/9150) - Compatible with cassettes up to 32T
  • eTap - 11sp - Cassettes up to 32T
  • AXS - Compatible with both Red and Force 12sp - Cassettes up to 33T

  • B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    Please note: This product ships signature required.

    Mfg PartNum: HSS-891-SLV 

    Mfg PartNum: HSS-891-RED 

    Mfg PartNum: HSS-AXS-BLK 

    Shimano 679 - Black

    Mfg PartNum: HSS-679-BLK 

    Shimano 891 - Black

    Mfg PartNum: HSS-891-BLK 

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    Try us today to see why so many of our customers come back again and again.

    *Orders received before 3:00PM Pacific time are shipped the same day (Mon-Fri). Orders over $50
    are shipped free (USA only, excluding AK and HI). Some exceptions apply. See Shipping for details. 28


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