A trailer that sat loaded may shake for a reason other than balance
Seasonal fleets park trailers for months at a time, and sometimes they are parked loaded, or on soft ground, or simply left where they last stopped. When those trailers go back into service, a vibration at highway speed is common. The obvious suspect is balance. Often the real cause is a flat spot.
A tire that carries a heavy load without moving for a long time can take a set where it meets the ground. The flattened section bumps once every revolution, and at speed it feels very much like an out-of-balance wheel.
A temporary flat spot from a short park usually rolls out within the first few miles as the tire warms up. A tire that sat loaded for a long stretch, particularly in heat, may keep a permanent one. Balancing will not fix that, because the tire is no longer round.
How to tell
Drive the unit for a while before deciding anything. If the vibration fades as the tires warm, it was a temporary set. If it stays, have the tires inspected for flat spots and out-of-round before paying for a balance that cannot solve it.
To prevent it: park trailers that will sit for a long time empty if possible, on firm level ground, and move them occasionally. Check pressures before they go back to work.
When it really is balance
New tires are balanced at fitting. A tire remounted on a different wheel, a lost weight, or a vibration that appears without any long park are all reasons to book a balance. Pressures should be checked cold first, against the specification.
A pull, or a vibration at every speed, is more likely alignment, and heavy-duty truck alignment and car and light truck alignment are both here. The national tire and wheel balancing page covers the occasions worth asking for it.
Other stores nearby
Casa Grande and Phoenix also balance tires and wheels.
About this store
The Yuma store carries all nine Purcell tire categories and is managed by Sean Quintanilla.
See the national tire and wheel balancing page for all 51 locations.