OVAL GUIDE™ - ISCG 05 - 38


The lightweight 1x Chain Guide for Oval Chain Rings is amazing; It weighs only 23g, mounts in no time on to ISCG 05 and keeps the chain safely in place in any position of the Oval Chainring. Developed in Germany in cooperation with absoluteBlack is the OVAL GUIDE ™ from 77designz probably the lightest fully adjustable chain guide in the world. Now coveres chainrings up to 38 Teeth.

More details


41,97 €

+ Shipping

More info

Which Chainguide fits my bike?

Use our FRAME FIT form to find the right chainguide for your bike.


  • Install without crank removal
  • Torx 25 only single tool installation
  • Designed for Oval and Round Chain Rings
  • Boost compatible
  • Incredibly Light
  • Front Flip Technologie for tool free service
  • NEW: Made in Germany


    Mount: ISCG 05 
    Capacity: 24-38T Round 26-36 Oval
    Chainline: 48-53 mm (Boost Ready)
    Compatibility: 1x10, 1x11 or 1x12 drivetrain
    Backplate: AL 7075 T6 Black Anodized
    Slider: PA66 GF 10 (Front Flip Technology)
    Hardware: Torx 25 Hollow Bolts
    Color: Black
    Weight: 23g (incl. mounting hardware)


    • Chainline Spacer Set
    • 2x M6x11 Torx 25 Ti Bolt

    DIA AWARD 2017 77designz OVAL GUIDE oval guide review mtb lab 77designz Freesolo auf MTB news 77designz freesolo Chainguide Cycleholix review oval guide  


    !!! Not compatible with Bionicon and Garbaruk direct mount oval rings 30T / 28T / 26T due to smaller Chain Line !!!

    !!! The OVAL GUIDE works only with 1*10 drives if you have an clutch rear derailleur and an narrow / wide chain ring !!!

    To match OVAL GUIDE™ - ISCG 05 with our CRASH PLATES you also need the CONNECTOR

    Mounting Standards Overview:

    Which standard has your bike? HDM | S3 | E-TYPE | ISCG 03 | ISCG OLD | ISCG 05 | ISCG 05+BSA | YT Jeffsy

    77designz Chainguide Mountingstandards E-Type, S3, HDM, ISCG 05, ISCG 03, YT Jeffsy

    Watch the Installation Instruction:

    All our chain guides are super easy to mount. You don´t even have to remove the crank. Just watch the video below and you will see how easy it is. You only need a T25 Key. When installing the chain guide use 3 Nm to tighten the Slider Screw (Blue) and 6 Nm for the M6 screws (Silver).


    To match OVAL GUIDE™ ISCG 05 with our CRASHPLATE you need the >> CONNECTOR

    absoluteBlack and 77designz

    The unique cooperation of absoluteBLACK (oval chainring expert) and 77designz (smart, ultralight chain guides manufacturer), resulted with entirely new product that is incredibly light, mounts in no time, secures the oval chainring at any position of the pedal and can be opened by hand if there is a need of chain removal.

    77designz Crash Plate