COMPACT UNIVERSAL CRANK PULLER PARK TOOL CWP-7

The Park Tool CWP-7 is a compact, universal wrench-driven crank puller for removing crank arms from virtually all three-piece crank systems. It works on both square taper and splined crank arms, thanks to two interchangeable swivel feet.

The principle is simple: the puller threads into the M22 x 1.0 extractor threads of the crank arm and the rotating tip, driven by the threaded shaft, presses against the bottom bracket spindle until the arm comes off. The extra-fine threads of the shaft provide the leverage needed even on the tightest cranks. An adjustable wrench is required to operate it.

How to use the CWP-7 crank puller

• Unscrew the crank bolt or nut counterclockwise; if present, first remove the dust cap and any washer under the bolt.
• Choose the foot: the small one for M8 bolts, the large one for M12 or M15 bolts.
• Back out the driving shaft until it is recessed in the tool's hex fitting, so the 22 mm thread can fully engage the crank arm.
• Thread the puller fully into the crank arm without cross-threading: partial engagement can damage the crank threads.
• Turn the shaft clockwise until it contacts the bottom bracket spindle and continue until the crank arm comes off, then repeat on the other side.

Why choose Park Tool CWP-7

• One tool for square taper and the main splined standards: Shimano Octalink, ISIS Drive, ISIS Overdrive and SRAM PowerSpline
• Small foot also compatible with BNI crank arms for Bosch e-bike systems
• Interchangeable rotating tip that pushes the crank arm off the spindle
• Extra-fine threads for leverage even on stuck crank arms
• Compact format, handy on the workbench and in the toolbox

Note: some fitness equipment crank arms use nonstandard extractor threads, so check with the equipment manufacturer. To remove three-piece cranksets cleanly and safely, the Park Tool CWP-7 compact universal crank puller is the reference tool.