You can true a bicycle wheel at home with nothing more than a spoke wrench, a zip tie or a bit of tape, and patience. Clamp the bike upside down or in a stand, fix a pointer at the rim so it nearly touches the braking surface, spin the wheel to find where the rim swings toward the pointer, and tighten the spokes that pull the rim back the other way.
"Truing" means straightening the rim so it runs flat and round between the brake pads. A wheel goes out of true when spoke tension becomes uneven — after a pothole, a hard landing, or simply a few thousand kilometres of riding. The job is slow rather than hard, and the main skill is making smaller corrections than you think you need.
Table of Contents
- Which way the wheel is bent, and what you can fix
- Tools and a stand-in for the truing stand
- The correction, step by step
- Dish, radial hop, and the mistakes that cost you a rim
- When the answer is a wheelbuilder, not a wrench
- Frequently Asked Questions
Which way the wheel is bent, and what you can fix
Rims wander in two directions. Lateral runout is side-to-side wobble, the kind that makes a rim buzz a brake pad once per revolution. Radial runout is up-and-down — a flat spot or a high spot that makes the wheel feel like it has a hop in it. Most home truing addresses lateral wobble, which is both the more common complaint and the easier correction. Spokes on a standard wheel alternate: one goes to the left flange of the hub, the next to the right.
Each one pulls the rim toward its own side of the hub. That is the whole mechanism you are working with — tighten a left-side spoke and the rim moves left; loosen it and the rim drifts right, because the right-side spokes now win the tug of war. Some problems are not truing problems and will not respond. A dent in the rim's sidewall, a crack around a spoke hole, a rim that has worn concave from years of rim braking, or a hub whose bearings let the whole wheel rock sideways all produce symptoms that look like a wobble. Check for those first: grab the rim and try to rock it toward the frame. If it moves as a unit, the play is in the hub, not the spokes.
Tools and a stand-in for the truing stand
You need a spoke wrench that fits your nipples. Spoke nipples come in several sizes, commonly in the 3.2 mm to 3.5 mm range, and a wrench that is one size too large will round the flats off a nipple in a few turns. Buy the right size or a three-sided wrench that engages properly; adjustable wrenches and pliers are how nipples get destroyed.
The truing stand's only real job is to hold a steady reference next to the rim. Substitutes that work: Flip the bike over or hang it so the wheel spins freely. A repair stand is nicer but not required. One genuine limitation: without a dial indicator you are judging by eye and ear, which is accurate to roughly a millimetre with care — fine for brake clearance, short of what a wheelbuilder would call finished.
- A zip tie around the fork leg or seatstay, with its tail trimmed to almost touch the rim's braking surface. Slide the tie to adjust the gap.
- Rim brake pads themselves: back the barrel adjuster off so the pads sit close, and use the gap you hear and see.
- A piece of tape or a cable tie on the frame plus a drop of chalk on the rim to mark where it rubs.
- For radial runout, a pointer aimed at the rim's outer edge rather than its side, with the bike held still.
The correction, step by step
Work slowly and keep track of which way you are turning. The nipple is threaded onto the spoke from above, so when you look down at it from outside the rim, clockwise tightens and counter-clockwise loosens — the reverse of what your hand expects when you reach under the rim. For a spot wobble spanning only two or three spokes, adjust those few.
For a long, gentle bend over eight or ten spokes, spread small adjustments across all of them — a quarter turn on one spoke in the middle will create a kink rather than remove a curve. Check spoke tension by feel as you go: squeeze pairs of spokes and compare them around the wheel. If a spoke has gone slack while its neighbours are tight, bring it up rather than hunting for the wobble elsewhere. A wheel that is geometrically straight but has one loose spoke will go out of true again on the next ride.
- Spin the wheel and find the worst spot where the rim swings toward your pointer. Mark both ends of that zone with tape or chalk.
- Find the centre of the bend and identify the spoke there that runs to the *opposite* flange from the direction the rim is bulging.
- Turn that nipple a quarter turn tighter. Loosen the neighbouring spoke on the bulge side by about an eighth turn if the zone is wide.
- Spin again. If the bulge moved toward the fix, continue in quarter turns; if it got worse, you turned the wrong nipple — undo it.
- Move to the next worst spot and repeat. Stop when the rim clears your pointer all the way around.
Dish, radial hop, and the mistakes that cost you a rim
Dish is the rim's position relative to the hub's locknuts — it must sit on the bike's centreline so the tyre is centred in the frame. You cannot see dish with a zip tie on the fork, because the fork is your reference. The cheap check: note the gap between rim and frame on each side, then remove the wheel, reinstall it facing the other way, and compare. If the gap swaps, the wheel is dished off-centre, and correcting it means tightening one whole side and loosening the other by equal amounts. Radial hop is harder at home. Tightening a pair of spokes at the high spot pulls the rim inward there, but it also raises tension locally and pulls the wheel out of lateral true.
Expect to alternate between the two. A hop of under a millimetre on a rim-brake wheel is not worth chasing; a hop you can see from across the room usually means a damaged rim. Three mistakes do real damage. Turning nipples in half or full turns overshoots and produces a wheel that chases itself in circles. Over-tightening to remove a wobble can pull a nipple through the rim or crack the rim at the eyelet, especially on a worn rim. And ignoring wind-up — the spoke twisting instead of the nipple turning — leaves stored tension that unwinds while you ride; hold the spoke with your fingers to feel whether it is twisting, and overshoot slightly then back off to settle it.
When the answer is a wheelbuilder, not a wrench
Hand the wheel to a shop if the rim is cracked at a spoke hole, if the sidewall is dented or has worn thin from braking, if more than one or two spokes are broken, or if the rim will not come true without taking some spokes to a tension noticeably higher than the rest. Those are structural problems, and a wheel that fails at speed does so suddenly.
Disc-brake wheels tolerate more lateral runout than rim-brake wheels — there is no pad near the rim, so a small wobble changes nothing about how the bike stops. On a rim-brake bike, the brake surface is also the reference surface, so the standard you need is simply: the pads do not touch when the brake is released. That is an honest, achievable target without a stand, and it is the one worth working to.
Frequently Asked Questions
How tight should the spokes be?
Without a tension meter, judge by comparison rather than absolute feel: all the spokes on one side of the wheel should feel similar when squeezed. On a rear wheel the drive-side spokes are normally noticeably tighter than the non-drive side, which is normal and comes from the dish.
Can I true a wheel with the tyre still on?
Yes for lateral truing — the braking surface and the nipples are both accessible. For radial truing, or if you need to check the rim strip or a nipple that spins freely, take the tyre and tube off.
Why does my wheel go out of true again after a few rides?
Usually spoke wind-up that unwound, or a spoke that was slack and never brought up to tension. It can also mean a cracked rim or a loose hub flange, both of which get worse.
Do I need to loosen spokes at all, or just tighten?
Tightening alone works for small corrections but raises overall tension each time. Across a whole wheel, pair your tightening with equal loosening on the opposite side so the tension stays in a usable range.
