Park Tool SW-15C Three Way Internal Nipple Wrench Aero Rim Tool

Park Tool SW-15C Three Way Internal Nipple Wrench

The Park Tool SW-15C is a versatile, shop-proven solution for servicing internal spoke nipples found on many modern deep-section aero rims. Designed to handle multiple nipple standards, this three-way internal nipple wrench combines the most commonly used internal nipple interfaces into one compact, easy-to-use tool.

With an extra-long reach capable of working inside rims up to 50mm deep, the SW-15C is an essential addition for mechanics servicing carbon road wheels, aero gravel wheels, and high-performance wheelsets from leading manufacturers.

Key Features & Benefits

• Three-in-one internal nipple tool
  Combines multiple nipple interfaces in one wrench

• Multi-standard compatibility
  Includes:

  • 3.2mm square drive

  • 5mm hex socket

  • 5.5mm hex socket

• Deep rim access
  Designed to work inside rims up to 50mm deep

• Compact three-way design
  Easy to handle, quick to switch sizes, ideal for shop or travel use

• Precision-machined sockets
  Secure fit minimizes nipple rounding and damage

• Park Tool professional quality
  Built for durability, accuracy, and repeated shop use

Compatibility

✔ Internal Spoke Nipple Types:

• 3.2mm square

• 5mm hex

• 5.5mm hex

✔ Wheel & Rim Compatibility:

• Deep-section aero rims (up to 50mm)

• Carbon and aluminum rims with internal nipples

✔ Known Compatible Wheel Brands Include:

• FSA

• Blackwell

• Planet-X

• HED

• Rolf

• Bontrager

• Campagnolo

• Mavic

(And many others using internal nipple systems)

Technical Specifications

• Model: SW-15C

• Tool Type: Three-way internal nipple wrench

• Drive Sizes:

  • 3.2mm square

  • 5mm hex

  • 5.5mm hex

• Maximum Rim Depth: 50mm

• Application: Internal spoke nipple adjustment

Recommended Uses

• Truing deep-section aero wheels

• Servicing carbon road and gravel wheelsets

• Working with mixed internal nipple standards

• Professional bike shop and advanced home mechanic use

Why Choose Park Tool?

Park Tool tools are trusted by professional mechanics worldwide for precision, durability, and ease of use. The SW-15C delivers unmatched versatility for internal nipple wheels—reducing the need for multiple tools while ensuring accurate spoke adjustments.

One tool. Three nipple standards. Built for modern aero wheels.