S&M Motoman Sprocket

Product Overview

The S&M Motoman Sprocket is a CNC-machined aluminum chainring with styling inspired by 1970s Motomag wheels. It uses 3/32" tooth profiles that accept all BMX and single-speed chain types, from standard 1/8" chains to narrow 3/32" race chains. Available in six tooth counts (30T-44T) to accommodate different gearing preferences, with included steel hat washers for 19mm and 22mm spindle compatibility.

Key Features

• CNC-machined 6061-T6 aluminum – Precision cutting ensures accurate tooth profiles and mounting interfaces for smooth chain engagement and extended chain life
• 3/32" tooth width – Universal compatibility with all BMX chain types (1/8" BMX chains, 3/32" race chains, and single-speed chains) eliminates compatibility concerns
• 15/16" (24mm) center bore – Fits directly on 24mm spindles; includes steel hat washers to adapt for 19mm and 22mm spindles without additional hardware
• Six tooth count options – 30T, 33T, 36T, 39T, 42T, and 44T sizes cover wide gearing range from technical street to cruiser setups
• Motomag-inspired design – Machined cutout pattern references classic BMX wheel design while reducing weight without compromising structural integrity
• Made in USA – Domestic CNC manufacturing ensures consistent quality and precise tolerances

Technical Specifications

• Material: 6061-T6 aluminum, CNC-machined
• Tooth width: 3/32"
• Center bore: 15/16" (24mm)
• Available tooth counts: 30T, 33T, 36T, 39T, 42T, 44T
• Spindle compatibility: 19mm, 22mm, 24mm (with included washers)
• Includes: Steel hat washers for 19mm and 22mm spindles
• Chain compatibility: All BMX and single-speed chains
• Made in USA

Compatibility and Ideal Use Cases

This sprocket fits all three-piece cranks with 19mm, 22mm, or 24mm spindles (use appropriate included washers for 19mm and 22mm). Works with any BMX chain—standard 1/8" width, narrow 3/32" race chains, or single-speed chains. Ideal for riders who want vintage-inspired aesthetics with modern manufacturing quality, or those who switch between different chain types and need universal compatibility. Smaller tooth counts (30T-36T) suit technical street and park riding with quick acceleration, while larger sizes (39T-44T) work better for cruising, trails, and maintaining speed with less pedaling effort.