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Introduction

How to pick a dual ring guide system for your bike

  1. Dual ring guides are one of the more complicated guidance systems, so we will need to narrow down a few options to see what will work best for your bike
    • Dual ring guides are one of the more complicated guidance systems, so we will need to narrow down a few options to see what will work best for your bike

    • When picking a guide, you will need to know a few things

      • Which guide features suit your riding style and bike best (see steps 2-3)

      • How the guide will be fixed to your bike (See step 4-7)

      • If your cranks will work within the specified chainline of the guide (see step 7-9)

      • Front derailleur compatibility (See step 10-12)

  2. There are two bash protection options for the TRS dual guide and one option without bash protection
    • There are two bash protection options for the TRS dual guide and one option without bash protection

    • The DMB/direct mount bash version and the no bash/Turbocharger version

    • The Direct mount bash (DMB) version has a bash guard mounted directly to the backplate of the guide and is perfect for double specific cranks that do not allow for a ring mounted bashguard in the big ring position

      • This is because there is no big ring position on a double specific crank

    • The no bash/Turbocharger version comes with two lower sliders in the box

      • One that allows you to run the guide without a bashguard

      • And one that allows you to use a ring mounted bash guard (sold separately) in the big ring position if your cranks allow it

    • Our bashring is called the Turbocharger, hence the name

    • Having a bash in the big ring position also gives you over-shift protection, giving you 100% chain security

    • As far as mounting the guide to a frame, there are four options

      • BB

      • BBwide

      • ISCGold

      • ISCG05

    • ISCG05 and ISCGold fit the two different ISCG standards

    • ISCG spacers are used to adjust the chain line of the guide to match your cranks

    • You can read more about the two ISCG standards here: ISCG explained

    • For bikes without ISCG tabs the guide may be mounted under the bottom bracket

    • You must have a threaded bottom bracket to mount the guide to the BB shell

    • Frames with press-fit BB shells and no ISCG tabs do not provide any mounting for a chainguide, sorry but there is simply no place for us to reliably mount a guide

    • We offer two different BB mount backplate

      • BB

      • BBwide

    • The BB and BBwide backplates differ in their chainline

      • Chainline can be checked by measuring from the center of the frame, to the center of the big ring

    • For more info see Chainline explained

    • BB mount is for a traditional or standard double crank with a chainline of 50-51mm

    • Standard doubles are essentially converted triple cranks missing the big ring, sometimes a bash is used in the big ring position

    • All e*thirteen cranks are standard doubles

    • BBwide is for double specific cranks as those cranks use a wider chainline

    • Wide doubles are double specific and typically have a chainline of 53-53.5mm to the middle of the outer ring

    • Wide doubles have no bash mounting position (both Sram and Shimano now offer these cranks)

    • Front derailleur function is vital to the performance of dual ring guides. An improperly used front derailleur will cause the guide to function poorly.

    • Be sure to choose a derailleur that is designed to work with your chosen chainring sizes.

    • Guides not using a Turbocharger bash ring must be used with a double specific front derailleur

    • Check with your derailleur manufacturer to make sure your derailleur is 2x specific

      • If your frame uses a direct mount front derailleur you must use the direct mount derailleur that matches your large chainring size. Direct mount front derailleurs are chainring specific.

    • For guides using a bashring in place of the big ring, a triple front derailleur should be used.

    • Check with your derailleur manufacturer to make sure you have the correct front derailleur.

Conclusion

Thanks for reading, now get out there and ride!

The Hive

Member since: 12/05/2012

51 Guides authored

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