S&M ATF Frame (Flat Black) (20.5″)

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.

Features:

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

Specifications:

• 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

Geometry:

• 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 May 16, 2025