How to Install a Track Cog Lockring: Step-by-Step Guide

Quick Answer

To install a track cog lockring, first thread the cog onto the hub, then hand-tighten the lockring, and finally torque it to 40 Nm using a lockring tool. If you lack the tool, a punch and hammer can work in a pinch, but the proper tool is safer and prevents damage.

Track cogs and lockrings are simple parts, but getting them wrong can mean a slipping cog or a damaged hub thread. Whether you're building a fixie or swapping gears, this guide-228392">guide walks through each step with the torque specs and common mistakes to avoid.

You'll need a lockring tool, a wrench or torque wrench, and optionally a bit of grease. If you don't have the tool, we'll cover a workaround—but we'll also explain why the right tool is worth it.

Tools You'll Need

The essential tool is a lockring tool that fits your specific hub. Most track hubs use a standard Shimano-style lockring tool, but check your hub manufacturer. You'll also need a wrench (or torque wrench) that fits the tool, and optionally a small amount of anti-seize or grease for the threads.

If you're using a torque wrench, aim for 40 Nm (30 ft-lb) as a general guideline for track lockrings. Always check your hub and lockring manufacturer specs, though—some hubs require more or less. If you're not torquing, at least get it as tight as you can with a strong hand and a decent lever arm.

• Lockring tool: specific to your hub spline pattern
• Torque wrench: 40 Nm (30 ft-lb) is a common spec
• Grease or anti-seize: optional but helps prevent seizing

Step-by-Step Installation

Start by cleaning the hub threads and the lockring threads. Apply a light coat of grease or anti-seize. Thread the track cog onto the hub by hand until it's snug—do not cross-thread. Then thread the lockring on top of the cog. It should spin on smoothly until it touches the cog.

Now comes the critical part: tightening. Place the lockring tool into the lockring's splines, making sure it's fully seated. Attach your wrench or torque wrench. Turn counterclockwise to tighten (left-hand thread on most rear track hubs). Torque to 40 Nm or your hub's spec. If you don't have a torque wrench, get it as tight as possible with a firm hand.

Finally, check that the cog doesn't have any play. Grab the cog and try to rock it; if you feel movement, the lockring isn't tight enough. Re-tighten and test again. Once it's solid, reinstall your wheel and you're good to go.

• Always check for play after tightening
• Counterclockwise to tighten on most rear hubs
• If you're unsure, visit a shop for a quick check

Installing Without a Lockring Tool

If you're in a bind and don't have a lockring tool, you can use a punch and hammer. Place the punch on one of the lockring's splines and tap counterclockwise with a hammer. Work around the lockring gradually to avoid damaging it. This method works but risks slipping and marring the lockring.

Another hack is using a rubber mallet and a flathead screwdriver, but it's even more likely to slip. The real risk is damaging the lockring splines, making it harder to service later. For a permanent setup or frequent cog swaps, invest in a proper lockring tool—it's cheap and saves frustration.

• Punch and hammer: work around the splines
• Realize that hammering can damage the lockring
• A proper tool is recommended for long-term use

Common Mistakes to Avoid

The most common mistake is cross-threading the lockring when you start it. Always thread it by hand for the first few turns to ensure it's aligned. Forcing it can strip the hub threads, ruining the hub. If it doesn't turn smoothly, back it out and inspect the threads.

Another mistake is under-tightening. A loose lockring will allow the cog to spin, especially under hard pedaling or skidding. That can quickly ruin your hub thread. Conversely, over-tightening (beyond 40-50 Nm) risks cracking the lockring or damaging the hub. Use a torque wrench if you have one.

Finally, forgetting the left-hand thread orientation. Most rear track hubs use a reverse thread for the lockring. If you're turning clockwise to tighten (like a standard bolt), you're going the wrong way. Double-check your hub documentation before applying force.

• Hand-thread first to avoid cross-threading
• Over-tightening can crack the lockring
• Check thread direction: counterclockwise on most rear hubs

Key Steps at a Glance

1. Clean and prep threads: Remove old lockring, clean threads, apply light grease or anti-seize to prevent seizing. Checkpoint: Threads should be clean and free of grit.
2. Hand-thread cog and lockring: Screw cog onto hub by hand, then lockring on top. Ensure they spin on smoothly without cross-threading. Checkpoint: Both should thread easily by hand.
3. Tighten lockring: Use lockring tool and torque wrench to tighten counterclockwise to 40 Nm (or hub spec). If no tool, use punch and hammer. Checkpoint: Test for play—cog should not rock.

Related Products That Help

• Force 1 Hydraulic Disc Brake: The SRAM Force 1 HRD brake lever features their HydroR design, with superb ergonomics for better finger wrap. Enjoy seemingly effortless braking regardless of terrain or condition. Pairing a reliable brake with your track bike ensures safe stopping, especially if you're running a fixed gear with a lockring setup.
• Aris Stem: The Aris Aluminum stem is available in a wide range of lengths for versatility in fit, and feature a four-bolt faceplate. Proper fit on your track bike helps you maintain control and comfort, which matters even more when you're relying on precise gear setups.

Installing a track cog lockring is a simple task if you follow the right steps and use the right tools. Remember the left-hand thread, tighten properly, and always check for play. With these instructions, you'll have a secure setup ready for the road or track.