specialized giant cube cannondale Mavic Castelli endura altura
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  • Product Information
  • Reviews (2)
  • Casettes Guide
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  • Product Description

    Hope 40t-REx (40t ratio expander) allows you to upgrade your existing 11-36 10spd cassette to give an 11-40 range

    Key Features

    • Adapts a 11-36 10spd cassette to give an 11-40t range
    • T-REX ring installs behind existing cassette, replacing one of the smaller sprockets, usually 17t
    • Shimano and Sram specific tooth profiles and shifting
    • Compatible with:
    • Shimano XT and XTR 11-36 10spd cassettes
    • Sram PG1030, PG1050 and PG1070 11-36 cassettes

    "Giving your cassette big teeth for half the cost"

    40T-Rex Tech Specs

    Shimano and Sram specific 40t sprockets have been designed allowing benefits that wouldn't be possible with a larger sprocket size or with a universal type design:

    • Precise matching of the tooth profiles and shifting points specific to each cassette;
    • Perfect mating of supporting tabs reducing flex and aiding shift performance;
    • Lower B-tension adjustment is needed ensuring good shifting throughout the cassette range compared to fitting a 42t
    • Compatible with: Shimano XT and XTR 11-36 10spd cassettes and Sram PG1030, PG1050 and PG1070 11-36 cassettes
    • Hard anodized 7075T6 aluminium
    • Available in black, silver or gold hard anodised finish
    • Weight: 74g

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