Park SW-16 Internal Nipple Spoke Wrench - 3.23 mm Square
An essential tool for truing wheels with hard-to-reach internal spoke nipples, the SW-16 is sized for 3.23 mm square nipples.
The SW-16 is a tool we reach for, not one we simply resell. Park Tool design and manufacture it in Minnesota; ProWheelBuilder is an independent wheel builder in Georgia and a Park stockist, not the manufacturer.
What it does
Nipples are soft and the flats are small. A wrench that is a size out will round one on the first hard turn, and then the spoke has to come out.
Which size is this one?
The 3.23mm square size. It has to match the part exactly — close enough is what damages the fitting. Measure yours, or send a photo and we will confirm it.
Specifications
| Model | SW-16 |
|---|---|
| Park name | Internal Nipple Spoke Wrench - 3.23 mm Square |
| Type | Spoke wrench |
| Size | 3.23mm square |
| Brand | Park Tool |
About this listing
This listing is the SW-16 by itself. Tool orders are packed and posted separately from wheel builds.
How we use it at ProWheelBuilder
We sell the tools we work with. If a tool is on this site, someone here has used it on a customer wheel. Tell us what you are working on and we will confirm the SW-16 is the right call before you buy it.
Park have been making these in Minnesota since 1963 and publish repair documentation for them, which is the practical reason shops standardize on Park: the tool you buy now still matches the instructions in five years.
Park Tool's videos
Warranty
Park's warranty. Most Park Tool products carry a limited lifetime warranty against defects in material and workmanship. Pumps, stools, torque wrenches, electronic tools, motors and power supplies are covered for one year. Normal wear, misuse and damage from improper use are excluded.
ProWheelBuilder. Tools and accessories sit outside ProWheelBuilder's one-year wheel warranty, which applies to the wheels we lace. Cover for this item is the manufacturer's.
Full terms are on our Policies & Warranty page.
SW-16 questions
Do you ship tools on their own?
Yes. Tools and accessories ship by themselves; only wheel components get built into wheels here.
Is this the right one for my wheels?
Tell us what you are working on and we will tell you straight. A spoke wrench has to fit the part exactly; the wrong size does damage rather than work.
Not sure? Text or leave a voicemail on 470-253-0929 or email info@prowheelbuilder.com — you will be talking to the people who build the wheels.
