A Comprehensive Guide to Honda Bushing Replacement: Polyurethane vs Spherical Bearings
There’s a specific kind of transformation that happens when you replace worn-out suspension bushings—the car tightens up, the steering sharpens, and you realize just how much slop you’ve been living with.
Honda bushings are the unsung heroes of suspension performance. They’re small, they’re cheap, and they’re often ignored. But when they wear out, they make your car feel like a wet sponge. Replacing them is one of the most rewarding suspension upgrades you can do. The hard part? Choosing between rubber, polyurethane, and spherical bearings.
The Bushing Problem: Why They Fail
Honda’s factory bushings are made of rubber. Over time, heat cycles, road grit, and age cause them to harden, crack, and tear. You might not notice it happening, but the handling becomes progressively sloppier. A worn trailing arm bushing can cause the rear end to wander under braking. Worn control arm bushings let the alignment shift mid-corner.
On older Hondas, almost every bushing is a candidate for replacement. A forum member described how their stock bushings held up remarkably well for over 250,000 miles, but you could “see hairline cracks developing at the stress points” . That’s the limit of rubber.
The Three Options
When it’s time to replace, you have three main choices:
1. Rubber (OEM or Hardrace)
Rubber bushings are what the factory used. They’re the simplest and most predictable option.
Strengths: Rubber has no friction, absorbs noise and vibration well, and lasts 20+ years without any maintenance . They’re also the cheapest option overall when you factor in labor costs—you won’t need to replace them every few years.
Weaknesses: They deflect under load, which means the suspension geometry shifts slightly during hard cornering or braking. They’re not the highest-performance option, but for most street cars, that doesn’t matter.
The Honda-Tech consensus: “Replace all bushings with new rubber bushings” is a common recommendation for street cars . If you want a stiffer rubber compound, Hardrace offers a harder rubber bushing that’s a good compromise between performance and longevity.
2. Polyurethane (Energy Suspension, etc.)
Polyurethane bushings are stiffer than rubber and are a popular aftermarket upgrade.
Strengths: They reduce unwanted movement, tighten suspension response, and are cheaper than spherical bearings . They maintain their properties from -90°F to +227°F, so they’re reliable in extreme conditions .
Weaknesses: This is where the debate gets heated.
- Squeaking: Poly bushings are notorious for developing squeaks over time. One Miata owner noted: “After a while (not long), they start squeaking, and then they keep squeaking forever” .
- Maintenance: They require regular re-lubrication—at least annually, and some recommend every year at minimum .
- Lifespan: Poly bushings don’t last as long as rubber. One forum member estimated the Energy Suspension kit at $120 lasting 3 years compared to $300 for Hardrace rubber lasting 20 years .
- Comfort: They transmit more noise and harshness into the chassis. Another member said: “I hated my energy bushings. I was an idiot. I realized I was an idiot the first time I hit a bump and the car skateboarded over it” .
- Binding risk: The trailing arm bushing in Hondas requires movement in multiple axes, and some poly bushings restrict this movement .
The community takeaway: Many experienced Honda owners recommend avoiding polyurethane for the rear trailing arm bushing specifically. Stick with rubber for that pivot point .
3. Spherical Bearings
Spherical bearings are the most extreme option—essentially, they’re metal ball joints that replace the rubber bushings entirely.
Strengths: Zero deflection, zero friction, and they allow free movement along multiple axes . They provide the most precise, direct feedback possible. One member noted: “Spherical bearings allow free movement along more than one axis of rotation, so the suspension is free along its entire range of motion” .
Weaknesses: The list is long.
- Cost: Complete spherical bearing kits can cost $1,500-$2,500+ .
- Maintenance: Spherical bearings wear out faster than rubber—possibly within a year on a street car, with PTFE-lined bearings requiring regular replacement .
- NVH: They transmit significantly more noise, vibration, and harshness into the chassis. “They transmit everything into the chassis,” one member wrote .
- Installation: They require custom adapters and machining, as off-the-shelf options are limited .
- Street suitability: Most experienced owners recommend against spherical bearings for a daily driver. One member said: “It’s overkill for a daily driving platform” .
The community takeaway: Spherical bearings are for track cars that are regularly inspected and maintained. One knowledgeable owner recommended: “Run rubber bushings and stiffer springs/dampers rather than spherical bearings and softer springs/dampers” .
Comparison Table: Bushing Materials at a Glance
| Material | Best For | Ride Quality | Lifespan | Maintenance | Cost Range |
|---|---|---|---|---|---|
| Rubber (OEM/Hardrace) | Daily drivers, street use | Comfortable, quiet | 20+ years | None | Moderate ($300+ for master kit) |
| Polyurethane | Weekend cars, budget builds | Firmer, noisier | 3-5 years | Annual re-lube | Budget ($120+ for master kit) |
| Spherical Bearings | Track-only, competition use | Harsh, very noisy | Short (1+ years) | Frequent inspection/replacement | Expensive ($1500+) |
The Critical Detail: Clocking Bushings
When you install new bushings on a Honda, you must orient them correctly. This is called “clocking” . The bushing must be installed at the exact angle it sits when the car is on the ground. If you install it with the suspension hanging, the bushing will be pre-loaded and fail prematurely.
On lowered cars, you need to clock the bushing at the new ride height, not the factory position .
Installation Considerations
Replacing bushings is one of the most labor-intensive jobs on a Honda. There are 26 rubber bushings in the suspension . A press is the proper tool for installing rubber bushings—many owners buy a 20-ton press for the job, and it pays for itself in shop fees .
If you’re paying a shop, labor adds up. One member noted: “You also have to add in the cost of having the machine shop pressing out and in the bushings… Lordco charges $100 an hour” .
The Bottom Line
For a street-driven Honda, rubber bushings are the right answer. OEM or Hardrace rubber bushings provide a comfortable ride, last 20 years without maintenance, and deliver predictable handling. For the rear trailing arm bushing, stick with rubber—polyurethane can bind and cause serious handling issues .
Polyurethane is a good budget alternative if you’re willing to accept the noise, ride harshness, and regular re-lubrication. It’s a compromise that works for some, but many experienced owners regret it.
Spherical bearings are for track cars—period. They’re expensive, harsh, and maintenance-intensive. If you’re not setting lap times, you don’t need them.
FAQ Section
What type of bushing is best for a daily-driven Honda?
Rubber bushings (OEM or Hardrace) are the best choice. They’re comfortable, quiet, durable, and require no maintenance .
Why do polyurethane bushings get so much hate?
They squeak over time, require regular greasing, don’t last as long as rubber, and can cause suspension binding—especially in the trailing arm .
Are spherical bearings worth it for a street car?
No. They’re expensive, noisy, harsh, and wear out quickly. They’re designed for race cars that are inspected and rebuilt regularly .
What does “clocking” a bushing mean?
It means installing the bushing at the exact angle it sits when the car is on the ground. If you install it with the suspension hanging, the bushing will be pre-loaded and fail prematurely .
How many bushings are in a Honda suspension?
There are 26 rubber bushings in the suspension on a 92-00 Civic, plus another 20 in the steering .
Replacing bushings is a big job, but it’s one of the most impactful suspension upgrades you can do. It transforms how the car feels and responds. Just choose your material wisely—and remember, for a street car, rubber is the proven winner.
What’s your experience with bushing replacement? Have you used polyurethane or spherical bearings, or do you stick with rubber? Drop your thoughts in the comments below.
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