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Proper positioning of your front derailleur is essential for optimal front shifting, and the new setup tool allows anyone to easily achieve the necessary alignment. If your shifting is subpar, start by checking your mounting position and using a setup tool to adjust it as needed.
When upshifting to the big ring, there’s a tiny wedge that plays a big role in increasing the stability of your front shifts and preventing chain drops. If your front derailleur is braze-on mounted, check that one of three different sized wedges is installed to provide the additional and crucial support needed to enhance your shifting.
Getting the fastest and most secure front shifting requires careful fine tuning of the front derailleur's limits. Adjust the high limit screw, marked with H, if your chain drops outboard. Adjust the low limit screw, marked with L, if your chain drops inboard.
Correct chain length is critical for positioning the upper pulley wheel to produce crisp, secure shifts. When sizing your chain, wrap it around the large chainring and largest cassette cog with the flat edge facing away from the chainring and cassette. For 2x systems, add one inner link and one outer link where the chain starts to overlap. For 1x, add two inner links and two outer links where the chain starts to overlap. We like to measure twice and cut the chain once.
To make your shifting quicker and more responsive, make sure that your chain gap is set correctly using the gauge that came with your drivetrain. Shift the rear derailleur to the largest cog and place the gauge onto the upper pulley. Turn the B-Adjust screw until the appropriate gap between the upper pulley and the tallest teeth of the largest cog is attained.
If you hear the rear derailleur hesitating between gears or rasping at specific points on the cassette, use MicroAdjust to dial in your derailleur’s position in 0.25 mm increments. MicroAdjust is available in the AXS App within your bike’s Drivetrain Settings, or you can press and hold your shifter’s AXS button while pressing the shift paddle inward. Use the left shifter to adjust the derailleur inboard and improve shifting to an inboard cog, and the right shifter to adjust the derailleur outboard and improve shifting to an outboard cog.
When your limits are set correctly, your chain will never go into the spokes or fall into the frame. Start by shifting the rear derailleur into the largest cog and adjust the low limit screw (L) so that it lightly contacts the inner link of the rear derailleur. Then shift outboard to the smallest cog and adjust the high limit screw (H) until it lightly touches the inner link of the rear derailleur. This will keep the derailleur from moving too far inward or too far outward as your shift at each end of the cassette.
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