Park SW-42 Four-Sided Spoke Wrench - 3.45 mm
The iconic Park Tool spoke wrench design with a unique four-sided wrench shape for a precise, secure fit. Sized for spoke nipples with 3.45 mm (0.136 in) wrench flats.
The SW-42 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
A spoke wrench that fits properly is the cheapest insurance in wheelbuilding. A loose fit rounds the nipple, and a rounded nipple on a tensioned wheel means cutting the spoke out and rebuilding that section.
Which size is this one?
This is the 3.45mm version. Park make this tool in several sizes and they are not interchangeable: one step too large rounds the fitting off, and on a tensioned wheel that means cutting a spoke out and rebuilding that section. Not sure which you need? Measure across the flats or send us a photo.
What Park say about it
- Unique four sided jaws provide extra support on nipple flats
- Helps prevent slipping and deformation of aluminum nipples
- SW-40 (black) .127" nipple / 3.23mm
- SW-42 (red) .136" nipple / 3.45mm
Specifications
| Model | SW-42 |
|---|---|
| Park name | Four-Sided Spoke Wrench - 3.45 mm |
| Type | Spoke wrench |
| Size | 3.45mm |
| Brand | Park Tool |
About this listing
One SW-42, shipped on its own. We do not hold it back waiting on a wheel build.
How we use it at ProWheelBuilder
Our Park range is short on purpose: it is the kit a wheel shop actually needs, chosen from the bench rather than from a price list. So if you are buying the SW-42 to build or maintain your own wheels and you are not certain it is right for the job, ask us. We would rather point you at the correct tool than sell you the wrong one twice.
Park Tool has been in Minnesota since 1963, and their published repair procedures are written around their own tools — which is why most shop benches look broadly alike.
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. ProWheelBuilder's one-year wheel warranty covers the wheels we build and does not apply to tools and accessories, which carry their manufacturer's cover.
Full terms are on our Policies & Warranty page.
SW-42 questions
Do you ship tools on their own?
They do. A tool order is packed on its own and does not wait on anything else.
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.
