How to Build a BMX Foam Pit

Written by jonathan d. septer
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How to Build a BMX Foam Pit
Foam must be much thicker than this to keep a flying BMX bike and rider from injury. (pink foam image by laurent dambies from

Building a BMX foam pit as a permanent installation is extraordinarily costly and nearly impossible to upkeep outdoors without building an enclosure as water, insects, and animals will quickly invade an outdoor foam pit. Foam pits are usually assembled indoors in areas already pit-like in nature: abandoned swimming pools, truck shipping ramps, and auto repair pits to name a few. Building a proper foam pit anywhere but in a readily available converted indoor space would require building permits, concrete pouring and sealing, building construction, electric wiring, and a pile of money. Some riders use pre-built or homemade ramps to practice jumping tricks in the pit as well. Converting a readily available space to accept a pit is simple, and practicing with a pit gives most riders a sense of "near-invincibility," according to Jim Boswell of Boswell goes on to say it is best to "not trust this feeling."

Skill level:

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Things you need

  • Indoor area with a sunken level or a pit-like installation at least three feet deep
  • Mop
  • Broom
  • Bucket with warm soapy water
  • Measuring tape long enough to measure the pit dimensions
  • Enough 1 foot by 1 foot cubes of foam to fill the entire volume of the pit and cover exposed edges in and near the pit
  • High strength glue
  • Ramps (if desired)

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    Build a Foam Pit

  1. 1

    Find a location affording a pit-like opportunity.

    How to Build a BMX Foam Pit
    An indoor pool drained and dry is an excellent foam pit opportunity. (pool image by .shock from
  2. 2

    Sweep and mop the pit and surrounding area thoroughly.

  3. 3

    Measure the height, length, and width of the pit area and the length of all exposed edges being covered. Multiply height by length by width to determine volume.

    How to Build a BMX Foam Pit
    Measure height, length, and width to attain a volume measurement. (measuring tape image by Horticulture from
  4. 4

    Line the surface edges being covered with foam cubes.

  5. 5

    Glue 1 foot cubes of foam so lip of foam is overhanging the edge by at least one inch. Allow glue to dry.

  6. 6

    Fill the pit with the remaining cubes. Toss the cubes in no particular order as the spaces between the cubes will aid in protecting the rider from injury. Allow cubes to mound higher than the glued cubes lining the pit area.

  7. 7

    Move any desired ramps into position.

  8. 8

    Test the pit. Always wear a helmet and safety pads as BMX stunts are extremely dangerous.

    How to Build a BMX Foam Pit
    Jump in! (saut en bmx image by razorconcept from

Tips and warnings

  • If the pit area is shaped so volume is difficult to obtain, section the pit and obtain volumes by section.
  • Too shallow a pit may result in serious injury or death.
  • BMX stunts are dangerous by nature and as such should never be attempted without proper safety equipment.

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