Start by making sure you are using the correct guide for your application: TRS dual ring guide picker

This how-to guide will cover the ISCG mount version of the guide

TRS+ dual guides are not designed to be used with an ISCG adapter, so if you need to BB mount your guide just use the proper backplate

Remove your guide from the package

ISCG guides come with two sets of ISCG bolts and a selection of spacers, use the longest bolts your frame will allow

Remove your cranks from the bike

Install the guide on the bike

Start with the 2.5mm ISCG spacers under the guide

Install the ISCG bolts and spacers

Just lightly tighten the bolts for now

Loosen the bolt on the lower slider and swing the lower slider open

Adjust the lower slider to the position that matches the size of your big chainring

This guide is set-up in the 38t position

Release the lower slider by lifting the tab on the back of the slider and pulling the bottom of the slider out

Adjust the slider, then clip it back onto the backplate, be sure the slider nut is properly aligned with the hole in the slider

Slide the cranks back into the drive side BB cup and close the lower slider

tighten the slider bolt to 0.5nm

Sight down the back of the bike and check the chainrings to make sure they are properly aligned with the lower roller

Use the ISCG bolt spacers to adjust the guide until the roller is centered

Remove the cranks and tighten the BB to manufacturers torque spec

Reinstall the cranks per manufacturers recommendations

Check derailleur function and alignment before riding