Specialized P.4 Dirt Jumper Frame (Satin Rusted Red) (27.5") (25" eff)

Specialized P.4 Dirt Jumper Frame (Satin Rusted Red) (27.5") (25" eff)
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Price: $699.99 (Save 21%)
Sale: $549.99

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Specialized P.4 27.5" Dirt Jump Frame Description:

Specialized took their iconic P.3 DJ frame and scaled it up a bit for 27.5" wheels. This is ideal for riders who are: a bit taller, looking for something to carry a bit more speed, and/or those mountain bike riders not looking to stray too far away from the 29" wheels they are so used to.

The P.4 Dirt Jump Frame is constructed from high-grade, lightweight aluminum. The frame boasts expertly tuned geometry that strikes the perfect balance between stability and agility.

Your bike is an extension of your personality and riding style, and the P.4 Dirt Jump Frame empowers you to make it uniquely yours. The P4 frame uses boost rear spacing, sliding drop outs, and accepts a derailleur, allowing you to run gears if you choose. If you do add gears, you might as well add a dropper post as this frame is dropper post compatible as well! To keep things clean, the frame is designed with internal cable routing.

Dominate the dirt jumps, own the pump tracks, and redefine what's possible with a frame that's built to push the your boundaries.


  • Premium alloy material
  • Fully-butted tubing
  • Dropper post compatible
  • Compatible with both 27.5 and 26" wheels
  • Sliding adjustable dropouts
  • Internal cable routing
  • Single speed or geared compatible


  • Frame Material: A1 Premium Alloy
  • Headset Type: Tapered
  • Gyro Tabs: Not Drilled
  • Brake Mounts: 160mm Disc
  • Bottom Bracket Type: BSA 73mm (Threaded)
  • Seatpost Size: 30.9mm
  • Seat Clamp: 34.9 mm
  • Dropouts: 12 x 148mm Thru-Axle, Sliding Dropouts
  • Color: Satin Rusted Red
  • Weight: -


  • Toptube Length (Effective): 636mm
  • Wheelbase: 1094mm
  • Reach: 445mm
  • Chainstay Length: 385mm
  • Headtube Angle: 68.5°
  • Seattube Angle: 72°
  • Standover Height: 697mm
  • Bottom Bracket Height: 318mm

Top your new frame off with fresh bearings. Find a headset here.

Get a new bottom bracket kit here!

Confused by all that geometry? Check out our video below explaining BMX frame geometry and how it affects the feel of a bike.

This product was added to our catalog on August 14, 2023

Sizing Recommendations for Riders Who Fall Between Sizes:

  • Sizing down will provide a more maneuverable ride while sizing up will provide more stability
Rider Height (Feet)Rider Height (CM)
P.13'8" - 4'4"111 - 132cm
P.24'3" - 5'0"129 - 152cm
P.34'10" - 6'0"147 - 183cm
P.45'8" - 6'6"172 - 198cm

Note: All sizing recommendations are provided by the manufacturer and may differ for each rider.



Crank Length115mm140mm165mm165mm
Handlebar Width600mm680mm750mm750mm
Stem Length35mm35mm35mm35mm
Saddle Width110mm110mm110mm110mm
Seatpost Length200mm200mm200mm200mm
BB Drop5mm25mm22mm34mm
BB Height259mm290mm318mm318mm
Bike Standover Height561mm645mm691mm697mm
Chainstay Length320mm360mm385mm385mm
Fork Length (Full)380mm455mm480mm492mm
Fork Rake/Offset40mm40mm37mm44mm
Front Center520mm600mm668mm711mm
Headtube Angle68.5°68.5°68.5°68.5°
Headtube Length90mm95mm115mm120mm
Seat Tube Angle72°72°72°72°
Seat Tube Length265mm300mm335mm350mm
Top-tube Length (horizontal)449mm530mm598mm636mm

Note: All measurements are provided by the manufacturer and may vary depending on how measurements are acquired.