What the equalizer does and how it wears
Every bump one axle takes, the equalizer rocks to keep both axles loaded evenly. The wear points are the center pivot bushing and the wear pads where the spring ends ride. Worn pivots let the equalizer slop side-to-side; worn pads let the springs pound metal-on-metal. The downstream signature: uneven tire wear between the two axles of a tandem, clunking over dock plates, and a trailer that looks slightly "down" at one hanger.
Inspection: five minutes with a pry bar
With the trailer loaded, sight along both tandems — equal spring arch and even axle spacing side to side. Then pry: leverage the equalizer at its pivot; visible movement more than a few millimeters means the bushing is done. Look for shiny wear tracks or grooving where the spring tips ride, and cracks at the hanger welds — a seized pivot transfers its work into the hangers and they crack first.
Replacing: do the axle set with bushings and pads
Equalizers match by suspension series (Hutchens, Reyco and similar patterns dominate trailers) and by center-to-center dimensions — the casting numbers plus our listings' cross-references settle it. Replace in left/right pairs with new pivot bushings and wear pads: a new equalizer on a worn bolt and bushing lasts a season. Support the trailer properly and expect the springs to need persuading back into position — this is a jack-stands-and-patience job, but it's all hand tools.
Equalizer we stock right now
Live prices and stock from our Tacoma, WA warehouse — every part a Premium Quality aftermarket Direct Replacement with a 6+ month warranty and published cross-reference numbers.
3945816 Suspension Equalizer S-25436 M89430 Fits Hendrickson 2000-2025
338-886 Heavy-Duty Equalizer Beam Fits Suspension S338-886 E7532 16158-01
10287-01 Equalizer Bolt Assembly Fits Hutchison Heavy Duty , 334639 , R303414
TRK5544A Equalizer Bushing Kit Fits Hutchens Heavy Duty BKC118612GR8 , 334161
Equalizer Bushing Fits Hutchens 16146-01 Heavy Duty 331221
Frequently asked questions
How do I know which equalizer fits my trailer?
Match the suspension series (on the suspension ID tag or the old casting) and the equalizer's dimensions. The cross-reference numbers on our listings map the common Hutchens/Reyco-pattern applications; a photo of the old part plus measurements settles anything unclear.
What happens if I keep running worn equalizers?
The tandem stops sharing load: one axle overloads on every bump, tires wear unevenly, and the hangers and springs take hammering they weren't sized for. It graduates from a bushing job to a spring-and-hanger job.
Do equalizers need grease?
Depends on the design — greaseable pivots have zerks and want grease at every PM; rubber-bushed designs run dry by design. Whichever you have, replace bushings with the equalizer, not after.
Can I replace just one side?
Both sides of the axle group at once — they've done identical cycles, and mixed wear rocks the tandem unevenly. Doing one side twice costs more than doing both once.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships.
More part guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.