S&M - ATF Frame For 24″ Wheels

Product Overview

The S&M ATF Frame is a full chromoly BMX frame designed for 24-inch wheels, built for riders who need more room than a standard 20-inch setup but still demand park and street performance. It features balanced geometry that maintains responsiveness while offering increased stability and comfort on a larger platform. Manufactured in the USA with S&M's proven construction methods.

Key Features

• 100% chromoly steel construction – Full heat-treated tubing provides strength and durability for hard riding without unnecessary weight
• 24-inch wheel compatibility – Larger wheelbase offers better stability for taller riders or those transitioning from 20-inch bikes
• Integrated Campy-style head tube – Accepts integrated headsets for a cleaner look and reduced stack height
• Mid bottom bracket – Standard BMX BB placement balances pedal clearance with comfortable crank arm positioning
• 14mm dropouts – Compatible with modern BMX hub axles for secure wheel retention
• Threaded 990-style brake mounts – Allows installation of U-brakes for riders who run rear braking (mounts sold separately)
• Made in USA – S&M manufacturing ensures quality control and consistent frame alignment

Technical Specifications

• Wheel size: 24 inches
• Top tube length: 21.75 inches
• Rear end length: 14.7–15.5 inches (adjustable via dropout position)
• Head tube angle: 74.5°
• Standover height: 9.5 inches
• Bottom bracket height: 13 inches
• Seat tube angle: 71°
• Head tube type: Integrated Campy-style
• Bottom bracket type: Mid
• Brake mounts: Threaded 990-style (mounts not included)
• Dropouts: 14mm
• Seat post size: 1 inch / 25.4mm
• Weight: 5.54 lbs
• Material: 100% chromoly steel

Compatibility and Ideal Use Cases

This frame is designed for 24-inch BMX cruiser builds and requires 24-inch wheels, a mid bottom bracket, integrated headset, and 1-inch seat post. The 21.75-inch top tube works well for riders approximately 5'8″ and taller, or anyone seeking more cockpit space than a 20-inch bike provides. Best suited for street, park, and trail riding where the added stability and rollover capability of larger wheels is an advantage. If you plan to run a rear brake, you'll need to purchase threaded 990 brake bosses separately.