The job
A more encompassing contact than the conventional family; selected size remains a separate requirement.
Park Tool · Spoke-nipple wrench
Park Tool SW-40 Black Four-Sided Spoke Wrench
A more encompassing contact than the conventional family; selected size remains a separate requirement.
$9.95Nov 7, 26, 12:58 AM · New York
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- Nipple flats 3.23 mm /0.127 in
- Contact construction Four-sided engagement
- Treatment Heat treated
Nipple flats
3.23 mm /0.127 in
Match the exact opening
The selected size is 3.23 mm. Do not transfer another family member’s size from a shared description.
What this choice changes
Four-sided support around matching 3.23 mm flats
The SW-40 uses four-sided nipple engagement around the selected 3.23 mm (0.127inch) flats. Park Tool describes this contact as providing additional support for the nipple. That is the meaningful construction difference from a conventional wrench, rather than a guarantee that the nipple cannot slip or deform.
The black grip identifies this model’s size within the family. It does not make colour a substitute for checking the actual nipple. The selected red SW-2 in this catalogue is 3.45 mm, so it must not be presented as the same-size version of the contact comparison.
Choose SW-40 when the four-sided format and exact opening match the job. The heat-treated, nickel-plated, vinyl-dipped tool supplies the turning contact, not a holder for spoke rotation or a tension measurement. Check both engagement access and the component’s required adjustment procedure.
Specifications & supplied details
| Detail | Specification |
|---|---|
| Selected model | SW-40 / black |
| Nipple flats | 3.23 mm /0.127 in |
| Contact construction | Four-sided engagement |
| Finish/grip | Nickel plated; vinyl dipped |
| Treatment | Heat treated |
| Supplied | One wrench |
Choose for your actual setup
Match the exact opening
The selected size is 3.23 mm. Do not transfer another family member’s size from a shared description.
Choose contact support, not a result promise
Four-sided contact is a construction feature; correct fit and permitted use still matter.
Fit checks & limits
- Not interchangeable with the selected 3.45 mm SW-2.
- No aluminum whole-tool claim is adopted from the ambiguous material field.
- No damage-free or no-slip guarantee.
Questions before you choose
Do I still need a separate spoke holder?
The SW-40 turns the nipple; it does not clamp the spoke section against rotation. Use a separate compatible holder where that contact is required.
Will it fit the same flats as the selected SW-2?
No. That offer is 3.45 mm. Check the actual flats before choosing either.
Does the grip colour prove that it fits my wheel?
It identifies this tool in the maker’s family. The actual nipple size and access still determine fit.
Guides for this choice
Buying guide ↗
Match the Component Contact Before the Drive Handle
Separate the surface that touches the bicycle from the interface that accepts your wrench, then check access and any required retaining accessory.
Buying guide ↗Choose Wheel Tools for Runout, Dish and Spoke Tension
Decide which wheel measurement is missing, then match the support arrangement, spoke data and actual nipple profile.
Other equipment to consider
Selected listing details, manufacturer information and source images were compared. No hands-on trial or universal fit is claimed. Product identifier: B000YBCMGU.