Paul Components 100% Pure Paul Cranks

What They Say...

These crankarms are CNC machined in-house from ultra-strong 2024 American alloy. This allows us to remove a lot of material for an elegant design, while retaining excellent strength and stiffness. J.I.S. Square Taper means you can really fine-tune the Q-Factor. 3-bolt Direct-Mount means you can choose from a wide range of chainrings and offset options.

When Paul suggested we bring back our classic 100% Pure Cranks, but with an updated design featuring a 3-bolt direct-mount chainring spline and self-extracting crankbolts, we got excited. When he suggested JIS Square-Taper for the bottom bracket, we were like, “Uh, square-taper in 2025? I dunno…”

But a funny thing happened once we started mounting and testing prototypes. We realized we could really fine-tune the Q-factor and chainstay clearance of the crankarms via BB spindle length, then we could get the chainring nice and close to the chainstay for better chainline in the bigger rear cogs via chainring offset (0, -3, -6). Q-Factor nerds rejoice!

Crankbolts, extractor caps, and chainring bolts are included. Bottom bracket and chainrings are not. Read the instructions (included, or in the Technical Information above) to help determine chainring offset and bottom bracket length.

Technical Information

• Material
  American Milled 2024 Aluminum
• Available Lengths
  155, 160, 165, 170, 172.5, 175, 180
• Finish
  Black, Silver, Purple, Pewter & Hand Polished
• Weight
  516g (Pair of 180mm) including chainring bolts, crankbolts, and extractor caps
• Chainring Spline
  3-Bolt SRAM Direct Mount Spline
• Instructions
  Download