The EVO ST-1 Spoke Wrench (9g-15g) is a compact, round tool designed to adjust spoke nipple tension and true bicycle wheels. Built to support a broad range of standard wheel configurations, it’s a reliable and budget-friendly option for home mechanics..
Key Features & Capabilities
Universal Multi-Opening Layout: Features a standard circular cast steel design with multiple slots to fit different sizes of square spoke nipples.
9g to 15g Gauge Compatibility: Specifically designed to adjust spoke tension across a wide range of applications, from heavy-duty cargo bikes (9-gauge) to modern road and mountain bikes (15-gauge).
High Leverage Design: The round, coin-like shape allows for a secure grip, providing ample torque to turn even stubborn, corroded, or oxidized nipples.
Understanding Spoke Gauge Compatibility
The tool uses traditional wire gauge sizes, with slots numbered to match the wire width before it meets the nipple.
Spoke Gauge Size
Typical Bicycle Application
9g - 11g
Heavy e-bikes, cargo bikes, utility moped builds, and heavy-duty hub motor wheels.
12g - 13g
Heavy-duty rear commuter wheels, tandem bikes, and vintage cruiser hubs.
14g - 15g
The modern standard for most Mountain (MTB), Road, Gravel, and BMX bikes.
Practical Usage Advisory
Check for Nipple Play: Ensure the slot you choose fits snugly with minimal wiggle room. Using a loose-fitting slot under high tension can round off the square edges of aluminum or brass nipples, causing damage.
Lubrication Tip: For older wheels that haven’t been serviced in a while, apply a small amount of penetrating oil to the spoke thread and nipple before using the wrench. This helps prevent snapping the spoke wire under twist tension.
The EVO ST-1 Spoke Wrench is a versatile and essential tool for any cyclist or home mechanic, offering convenience, durability, and compatibility with a wide range of bikes.
