How to Put Together a BMX Bike Crank Razor Style

You've just bought your new Crank Razor BMX bike and you want to put it together so you can go and ride. Most store-bought bikes will arrive partially assembled in the box. Major parts such as cranks, headsets and forks will come installed and put together, leaving you with just a few steps to take to complete the assembly.

Things You'll Need

  • Park tool set, including a socket set, an Allen wrench and a crescent wrench
  • Grease
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Instructions

  1. Directions

    • 1

      Open the box and put the assembled parts in front of you. All your parts have already been attached or assembled so as to fit into the box prior to shipping. Pull out the frame and insert the stem into the forks. Adjust the handlebars to a neutral position. Don't tighten the handlebars yet; it is better to wait until you have completed the assembly so you can better determine the height they should be.

    • 2

      Add the front wheels into the forks and tighten the bolt to secure them in. Adjust the front brakes at this time; they should already be installed. Adjust the tension from the brake levers. Do this by playing with the swivel screw located on the brake lever itself. Adjust the tension until you find a good fit.

    • 3

      Loosen the seat post clamp located at the base of the head tube using an Allen wrench. Adjust the seat to a height that is comfortable for you.

    • 4

      Inset the pedals into the cranks. The pedals are stamped on the threaded ends with an "L" or an "R" to let you know which one goes where. When installing, be sure to add a small dab of grease to the threads before inserting into the cranks.

    • 5

      Go over your bike and make adjustments as needed. Adjust the seat height and handlebars to the desired position. When you are adjusting the handlebars, make sure they are in a neutral position with plenty of room to maneuver. Make sure your seat height allows for more that 75 percent extension of your legs to ensure that you can obtain the most power out of the pedals.

    • 6

      With all the parts tightened, complete the assembly by putting air into the tires to the proper pressure.