2nd Assault

  • Assault Dirt Jump 6061-T6 Aluminum Frame w/ steel reinforced horizontal BMX dropouts
  • Manitou Circus Dirt front fork for a plush landing upon your reentry of earths gravitational pull
  • Mechanical Disc brakes for enhanced stopping power

Whatchoo know ‘bout going big, boy? I can tell you what our DF5 Factory riders know and that is that there ain’t no street, park, or jump line that can throw off the 2014 Assault series. Designed and refined through feedback from our riders, the Assaults are burly little low slung rigs designed to trick, flip, stick and hit. Boom!

The 2nd Assault takes its cues from the (1st) Assault. Sharing the same 6061-T6 Aluminum frame w/Taper head tube, Mission formed top tube and steel reinforced horizontal BMX dropouts, these frames are stout and fully capable of going big. And weighing in at a respectable 4.5 lbs makes this one of the lighter dirt jump frames on the market.

Rocking a single speed specific horizontal dropout keeps things clean and simple. 69° head and 72° seat angles combined with significantly compact 15.3" chain stays and a 22” sloping top tube make the Assaults easy to throw around and manual for days.

The 2nd Assault comes spec’d with a Manitou Circus Dirt Jump, 100mm travel fork with a Maxle 20mm thru axle. This keeps the front end stiff and burly. Tubular chromoly cranks provide a solid jumping platform while the 32h Alienation PBR front and Black Sheep rear rims provide stout landing gear for touchdown. A Hayes HMX-5 Mechanical Disc rear brake with a V6 Rotor and Diamondback stem, bars, pedals, and signature Pivotal seat posted atop an Alienation Billy Club seatpost round out the package.

Diamondback is a brand that built its reputation on top of the line BMX bikes. 30 years later, we’re bridging that gap from our high end BMX to our high end mountain bikes. The Assault and 2nd Assault are just the rigs to do this.

The 2nd Assault is black and available in 1 size with a 22” toptube.


  • 6061-T-6 Aluminum Assault Dirt Jump Frame
  • Manitou Circus Dirt Jump Fork, 100mm travel, w/20mm thru axle
  • 48spline sealed cartridge BB w/25t DB alloy ring, 12t cog
  • Alienation PBR frt / Blacksheep rr Rims w/cartridge bearing hubs
  • Hayes HMX-5 Mechanical Disc Rear Brake with V6 Rotor

Bike Specs

Sizes 13" Medium 
Frame Assualt Dirt Jump 6061-T6 Aluminum frame w/Taper head tube, Mission Formed Top Tube, ISCG 05, steel reinforced horizontal BMX dropouts.
Fork Manitou Circus Dirt Jump, 100mm travel, 20mm thru
Rear Shock N/A
Cranks Tubular Cromo 48 Spline, 175mm
Bottom Bracket Euro Sealed Cartridge with 4 Sealed Bearings, 19mm spindle
F. Derailleur N/A
R. Derailleur N/A
Shifter N/A
Brake Levers Tektro Alloy w/ reach Adjust
Brakes Hayes HMX-5 Mechanical Disc w/V6 Rotor
Cassette 12t cog
Rims Alienation 32h PBR front / Blacksheep rear rims
Tires Kenda 26x2.35 Small Block 8 frt/ 26x2.1 NPJ rear tires
Pedals DB cromo replaceable pin Platform BMX pedal
Handlebar DB ProBar 740mm width 31.8mm Mid Rise
Stem DB AL6061 3D forge 31.8, 50mm ext. 7degree rise
Seatpost Alienation Billy Club Pivotal 30.9
Seat DB BMX, Pivotal Saddle
Headset FSA No57 Taper 1.5 / 1 1/8"standard cups, Sealed Cartridge
Colors Black
Chain KMC-HL710 Half link chain
Hubset (F) 32h Alloy Sealed bearing, 20mm thru axle (R) 32h Alloy single speed w/ CNC disc mount, Sealed Bearing, 10mm nutted axle
Spokes White 14g Stainless Steel
Grips DB4L Lock-on 135mm D2 Kraton
Extras Owner’s manual, Chainstay Protector, Clear Coat
Note Specifications Subject to Change


Size 13" Medium
Seat Tube Length ** 13.0"
Standover Height 27.0"
Top Tube Length * 22.0"
Head Tube Length 125.0mm
Head Angle 69.0°
Seat Angle 72.0°
Wheel Base 1055.0mm
Chain Stay Length 390.0"
Fork Offset 45.0mm
BB Height 330.0"
Stem Length 45.0mm
Handlebar Width 740.0mm
Crank Length 175.0mm
Seat Post Length 200.0mm
* Measured Horizontally ** Measured from Center

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