How to Make a Chainstay and Bottom Bracket Grind Guard for a BMX Bicycle

You can make a chainstay guard for my bike, as well as a bottom bracket guard. If you are interested, please read on.


  1. 1
    Get an old frame. A Free Agent Trail Devil with a steel rear-end is good, as the tubing is strong. Look for a frame that has the same bends as your bike (or at least close to the same size and shape).
  2. 2
    Bust out your handy angle grinder and cut off the back dropouts.
  3. 3
    Then cut the chainstay tubes away from the old frame.
  4. 4
    Do the same with the BB.
  5. 5
    Now cut the chainstays in half top to bottom so that you only have the outside half of the chainstay.
  6. 6
    Now smooth up the edges and shape the ends to your likings.
  7. 7
    Drill two small holes in the top of the guard and countersink it with a bigger drill bit.
  8. 8
    Put the guard on your frame where it fits the best and mark your hole spots.
  9. 9
    Do the same with the BB piece but put the two holes in the front of your BB (when its on your bike its the side closest to your front tire).
  10. 10
    Now After you have all of your holes marked it is time to drill the frame that you are putting the guards on.
  11. 11
    Drill and tap it to the same size bolts you are using. You cam pick up a set of flush mount bolts at the hardware store.
  12. 12
    Bolt them up.

Things You'll Need

  • An angle grinder.
  • A drill
  • An old bike frame, and the one you want to guard up.
  • A good set of drill bits and taps.

Article Info

Categories: Pictures | BMX