A torque wrench might be one of the most misunderstood tools in the modern cyclist’s workshop. For an industry obsessed with lightweight carbon parts, it’s ironic how casually many riders treat the one tool designed to protect them. A torque wrench isn’t just a ratchet that clicks. It’s a precision instrument—and using it correctly matters. If you use it wrong, you can still wreck parts just as effectively as if you were tightening bolts by feel.
If you care about your bike, here are the dos and don’ts that actually matter when using a torque wrench.
DON’T: Use Your Torque Wrench to Loosen Bolts
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Torque wrenches are not general-purpose ratchets. Using one to loosen stubborn bolts is a fast way to knock it out of calibration, or worse, damage the internal mechanism. Loosening a bolt often requires more torque, so it’s best to grab a general-purpose tool for the task. Some torque wrenches can work in both directions, but that’s for the rare case of a reverse-threaded bolt, not for loosening.
DO: Understand when to use grease, anti-seize, or thread locker
A lubricated bolt will achieve more clamping force at the same torque than a dry one. Grease, anti-seize, or thread locker is not only used for different purposes, but it also results in different clamping forces at the same torque due to their different coefficients of friction.
I learned this particular lesson the hard way when I broke two seatposts on a test bike ahead of its launch. This led the manufacturer to revise the assembly instructions for the seatpost wedge to be assembled dry. This lowered the effective clamping load on the post and alleviated the problem.
If the manufacturer specifies grease, it’s important that you use grease. If it calls for a thread locker, use the correct strength and amount. If it says install dry, don’t lube it “just to be safe.” When in doubt, a light coating of grease on clean threads is often appropriate, but always defer to brand guidance first.
DON’T: Work at the Extreme Ends of Its Range
Most click-style torque wrenches are most accurate in the middle 20–80% of their rated range. That means your 2–15 Nm wrench will be less accurate the closer you get to 2 or 15 NM. For most home mechanics, this shouldn’t be a huge issue, as most common bolts on a modern bicycle still fall into the “good” usable range of a click-style torque wrench.
DO: Hold It by the Handle
Torque equals force multiplied by lever length. The wrench is calibrated for a specific hand position, usually marked by a handle or knurled section.
Don’t hold a torque wrench like this.
Choking up on the shaft changes the effective lever length and can result in over-tightening. Always apply force at the intended grip area. If you’re using a crowfoot adapter, position it at 90 degrees to the wrench body to avoid altering the effective lever length.
DON’T: Click It Multiple Times
This is one of the most common mistakes you’ll see in bike build videos: click-click-click.
A torque wrench only needs one click. Once it clicks, stop. Repeated clicking on a stationary bolt can lead to over-tightening. If you want to “double-check” the torque for some reason, loosen the bolt (using a regular tool) and repeat the process with the torque wrench.
DO: Tighten Bolts in Stages
When dealing with multiple paired bolts, such as a stem faceplate or steerer clamp bolts, tighten them gradually and evenly. Alternate between bolts, increasing torque in stages until you reach the final value. For bolts in a circle, such as chainring bolts or SRAM’s 8-bolt crank interface, the recommended practice is to do a star pattern.
What you want to avoid is bringing each bolt to its full clamping force all at once.
DON’T: Ignore Your Instincts
A torque wrench can’t make sure that the bolt you’re tightening is properly aligned in the threads. If something feels wrong, like a bolt binding unusually or not turning smoothly, stop and reassess. Clean the threads. Inspect for any damage.
DO: Store It Properly
If you’re using an adjustable click-type torque wrench, dial it back to its lowest setting before storing it. Inside that tool is a spring under tension. Leaving it loaded can cause calibration drift over time.
Test Editor Dan Chabanov got his start in cycling as a New York City bike messenger but quickly found his way into road and cyclocross racing, competing in professional cyclocross races from 2009 to 2019 and winning a Master’s National Championship title in 2018. Prior to joining Bicycling in 2021, Dan worked as part of the race organization for the Red Hook Crit, as a coach with EnduranceWERX, as well as a freelance writer and photographer.
