What should I do if my back bike wheel wobbles?

Wheel Wobble (Lateral Movement)

As we shall see, there are in fact two phenomena that can generate constant jerks when you ride your bike. The first is what is commonly known as a wobble.

Wobble manifests itself as left-right shakes. If you feel that your back bike wheel wobbles (or even your front wheel), there's usually a problem with the wheel.

In this video, you can see exactly what it looks like:

The tire wobble

Wheel Hop (Vertical Movement)

The second type of phenomenon is a wheel hop sensation. In this case, you feel more of a vertical bump, as if the wheel were rising and falling with each rotation.

This event, which is rarer than the back bike wheel wobble, is just as unpleasant and is enough to spoil your enjoyment of the ride.

Step-by-Step Diagnosis: Why Is My Back Bike Wheel Wobbling or Hopping?

Whether it's a back bike wheel wobble or a hop, in the vast majority of cases the problem is caused by the wheel. In a very few cases, it may be the tire. The first step is therefore to establish whether the problem comes from one or the other.

To find out, check these points in the order given to eliminate the causes one by one:

1. Check If the Tire Is Properly Mounted

Some flaws such as those described above may simply be the result of incorrect mounting of the tire on the wheel seat. This can happen in particular with a tubeless-ready tire (sometimes also with a tubetype, but it depends on the wheel).

If the tire is not fully clipped in, the tire will not be evenly positioned around the wheel, resulting in a bike wheel wobble.

When fitting the tire, you need to have heard the snap sound when the tire clicks into place. If this has not happened, there is a good chance that the mounting has not been completed correctly.

To solve this problem, it's very simple: add pressure and the tire will settle itself. ATTENTION: It is mandatory not to exceed the maximum pressure recommended by the tire and rim manufacturers as it could lead to rapid air loss. Both are marked on the tires and rims.

2. Inspect the Wheel Without the Tire

If it's not an assembly fault, the wobble or hop may come from the wheel or the tire. As in most cases it is the wheel, we will first look at the steps to follow to confirm this.

Remove the tire and put the wheel back on the axle (on the chainstay if it's a rear wheel or on the fork if it's a front wheel).

Spin the wheel and observe it. If the problem is with the wheel, you'll see it go up and down with each rotation or spin strangely left and right.

A rarer case: if the wheel turns normally on its axle, there may be a slight intrinsic defect in the tire, which occurred during assembly. No manufacturer is immune to a slight imperfection. That's why Michelin tires are systematically quality-controlled to detect any anomalies. If your tire generates wobbling, it is impossible to correct the fault and we recommend that you contact your dealer.

Why does the wheel deform?

We will explain below the reasons for this type of deformation in the various scenarios.

In the case of a back bike wheel wobble:

There are two possible reasons why the wheel became deformed:

1 - Uneven left/right spoke tension

As a reminder, a back bike wheel wobble manifests itself as a left/right lateral movement. The spokes and their tension can be the cause if they are tighter on one side of the wheel than the other.

2 - The wheel may have taken an impact

If the wheel has taken a shock, it may have undergone a deformation that the spokes cannot compensate for.

In the case of a wheel hop:

There are also two possible reasons for wheel deformation manifested by a vertical hop on each rotation:

1 - Uneven top/bottom spoke tension

When you look at the wheel in profile from one side, you see spokes that go all the way around the circumference. If the spokes running from the centre to one end are tighter than those running in the opposite direction, this creates what is known as a "false round", which causes the rim to hop on each rotation. This may be due to a welding defect.

2 - The wheel may have taken an impact

If you hit a stone or a root too hard while riding, this can create a flat spot on the rim. As it is no longer round, this generates a rim hop each time the wheel rotates.

Can a Deformed Rim Be Fixed?

If the problem is spoke tension:

A professional or skilled cyclist can adjust the spoke tension to fix the issue.

If the rim is bent from impact:

There is no repair solution. The wheel must be replaced.

Pro tip: If you frequently ride on rough terrain, consider using wheels with stronger rims and reinforced spokes to minimize future damage

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Read our Frequently Asked Questions.

Wheel wobble has several possible causes. A rim that is out of true — not perfectly round or aligned laterally — causes the wheel to wander from side to side (lateral wobble) or hop up and down (radial wobble) as it rotates. A tire that isn't seated evenly on the rim creates a similar effect. Other causes include a bent or damaged rim, damaged or unevenly tensioned spokes, and a tire with an uneven bead or internal defect. Identifying which type of wobble and where it occurs helps diagnose the cause.

Remove the tire and spin the rim on its own. If the rim wobbles without the tire, the issue is in the rim — it needs truing or inspection for damage. If the rim is true but wobble returns when the tire is fitted, the issue is likely in the tire's bead seating. Run your eye along the bead line (the raised line molded near the edge of the tire) as you spin the wheel — any section where the bead line dips below or rises above the rim edge indicates uneven seating. Deflate, reposition that section, and re-inflate.

Deflate the tire completely. Work around the rim on both sides, pushing the bead firmly down into the rim's central channel with your thumbs — this creates slack that allows the bead to reposition. Lubricate the bead and rim seat lightly if the bead is stiff. Re-inflate slowly and watch the bead line as the pressure builds. At a moderate pressure, the bead often pops into its correct position uniformly. If one section repeatedly sits high or low, that section of the tire bead may have a manufacturing irregularity — contact Michelin or the retailer.

A severe wobble can destabilize the bike, particularly at speed, and can cause the tire to rub on the frame or brake pads. At slow speeds, a moderate wobble is an annoyance; at higher speeds it can affect handling enough to contribute to a loss of control. A wobble caused by a rim that is structurally damaged — cracked or severely bent — is a safety concern that requires the rim to be replaced rather than just trued. If the source of a wheel wobble can't be clearly identified and corrected, have it assessed by a bike mechanic.

A severely underinflated tire can cause the casing to fold or move on the rim, creating an apparent wobble. For tubeless setups, very low pressure can allow the bead to partially unseat, creating instability. In either case, inflating to the correct pressure usually resolves the issue if the rim and bead seating are otherwise correct. If wobble persists after inflating to the correct pressure, the cause is elsewhere — the rim, bead seating, or spoke tension.

Slow down gradually and stop at a safe location. Don't continue riding with a significant wobble — it may worsen if the rim is damaged or if a tubeless bead is unseating. Check the tire pressure and bead seating first, as these are quick checks. Check that the rear wheel is fully seated in the dropouts and the axle is properly secured. If the issue isn't immediately obvious, have the wheel inspected before further riding. A wobble that appears suddenly during a ride may indicate a broken spoke or rim damage from an impact.

What should I do if my back bike wheel wobbles?

Wheel Wobble (Lateral Movement)

The tire wobble

Wheel Hop (Vertical Movement)