S&M ATF Frame (Flat Black) (21")

S&M ATF Frame (Flat Black) (21")
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Price: $519.95

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S&M ATF BMX Frame Description:

The S&M ATF Frame was designed for excellent performance on the trails and in the park and streets. The All Terrain Frame (ATF) was made in the USA by S&M from Super Therm tubing. It features an integrated headtube, top and downtube gussets, externally machined Mid BB shell, integrated seat clamp, tubular stay bridges, tapered seatstays with bosses for removable U-brake mounts (sold separately), and 5mm thick dropouts. It's no surprise why the S&M ATF Frame is one of the most popular frames around.


  • Made in the USA
  • Responsive geometry
  • EZ-Out punch slots for BB
  • Removable brake mounts


  • Frame Material: 100% chromoly, super therm tubing
  • Headset Type: Integrated (Campy Spec: 45° x 45°) 
  • Gyro Tabs: Not Drilled
  • Brake Mounts: Removable (Not included, available here)
  • Bottom Bracket Type: Mid
  • Seatpost Size: 25.4mm 
  • Seat Clamp: Integrated 
  • Dropouts: 14mm Slot, 4Q-Baked 
  • Color: Flat Black
  • Weight: 4 lbs 12 oz


  • Toptube Lengths: 20", 20.5", 20.75", 21", 21.25", 21.5", 22" 
  • Chainstay Length: 13.4 - 13.875" 
  • Headtube Angle: 75° 
  • Seattube Angle: 71° 
  • Standover Height: 8.5" 
  • Bottom Bracket Height: 11.7"

Top your new frame off with fresh bearings. Find an integrated 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 July 19, 2020