Park Tool SW-12C Spoke Wrench
Best specialized wrench for truing wheels with integrated M7 nipples.
A specialized tool designed for precise adjustments on specific wheel systems. It offers a secure, dual-sided interface that prevents damage to delicate nipples, making wheel truing straightforward and reliable.
$19.95
at
Marblehead Cycle
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Who it's for
- Mavic wheel owners needing precise, secure nipple adjustments
- Professional mechanics requiring durable, long-lasting shop tools
- Wheel builders performing long, intensive truing sessions
Who should skip it
- Cyclists with standard wheels needing a universal spoke wrench
- Budget-conscious riders seeking an affordable, multi-purpose tool
- Mechanics working on corroded or seized aluminum nipples
Performance breakdown
Specialty Fit Precision
Engineered specifically for niche M7 nipples where standard wrenches fail.
Build Durability
Nickel-plated steel construction ensures this tool survives a lifetime of truing.
Ergonomic Handling
Vinyl-dipped handle provides necessary grip during high-tension wheel adjustments.
Aero Spoke Compatibility
Designed to pair perfectly with spoke holders for bladed aero wheels.
Versatility
Highly specialized design limits its utility to specific wheel systems.
Manufacturing Quality
Precision-machined in the USA to exacting tolerances for reliable performance.
Key Specs
Smaller end fitment
7-spline nipples with 6.4 mm outside diameter
Larger end fitment
6-spline rim fittings with 9.6 mm outside diameter and M7 threading
Material
Steel
Origin
Made in the USA
SW-40 Nipple Size
3.23 mm
SW-42 Nipple Size
3.30 mm
Number of Pieces
1
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