How To Adjust The Front Derailleur How To Adjust The Front Derailleur Items you will Need Phillips Screwdriver Allen Key Set Ruler Rag Degreaser Lube Step 1 -- Set Up Set your bike up on a bike stand so it is secure and easy for you to work on. Have the tools listed above near by so it will be a quick and easy adjustment. Clean all the parts with degreaser and wipe clean with a rag. Step 2 -- Derailleur Hight Adjustment Set your  front derailleur  on the big chainring. Make sure the slider/cage that moves the chain is set 2-3mm above the front chainring. If it is to high or low simply loosen the allen key bolt on the side of the derailleur and set  it to the desired hight using your hands then tighten the Allen key bolt. Step 3 -- Position For Low Limit Adjustment Set your rear derailleur onto the biggest cog and the front derailleur onto the smallest chainring.  Loosen the cable tension by using the Allen key on the tension bolt. Now you are ready to do the low limit adjustment. Step 4 -- Low Limit Adjustment With the Phillips screwdriver adjust the screw closest to the chainring (in most cases). There needs to be a 1-2mm gap between the chain and the inner part of the slider/cage. If there is a bigger gap than 2mm  tighten the screw until a 1-2mm gap is achieved. If the chain is touching the cage/slider then