POSITION ONE 4 BOLT CHAINRING 104mm

Product Overview

The Position One 4 Bolt Chainring is a 104mm BCD (bolt circle diameter) chainring machined from 6061-T6 aluminum. With a 5mm thickness and 3/32" chain pitch, it's designed as a straightforward replacement chainring for BMX cranks using the 4-bolt 104mm standard. Available in sizes from 37 to 44 teeth.

Key Features

• 6061-T6 aluminum construction – Lightweight alloy provides durability and corrosion resistance while keeping rotational weight low
• 5mm thickness – Heavier-duty profile compared to thinner chainrings, offering better stiffness and longer wear life under high torque loads
• 3/32" chain pitch – Standard BMX chain width compatibility; works with most single-speed BMX chains
• 4-bolt 104mm BCD mount – Uses four mounting bolts in a 104mm bolt circle diameter pattern for secure attachment to compatible cranks

Technical Specifications

• Material: 6061-T6 aluminum alloy
• Chainring Type: 4-bolt
• BCD (Bolt Circle Diameter): 104mm
• Thickness: 5mm
• Chain Pitch: 3/32"
• Tooth Count Options: 37T, 38T, 39T, 40T, 41T, 42T, 43T, 44T
• Weight: 114g (44T)
• Color: Black only

Compatibility and Ideal Use Cases

This chainring is compatible with any BMX crankset that uses a 4-bolt 104mm BCD mounting pattern. Not compatible with 5-bolt, splined, or direct-mount cranksets. Works with standard 3/32" BMX chains. Ideal for riders who need a durable, affordable replacement chainring for racing or street riding. The 5mm thickness makes it suitable for high-power applications and riders who want extended chainring life. Choose tooth count based on gearing preference—higher tooth counts (42T–44T) provide more top-end speed, while lower counts (37T–39T) offer quicker acceleration and easier pedaling.