HARDRACE SPHERICAL BEARINGS REAR KNUCKLE BUSHES 8PC SET NISSAN GT-R R35 350Z Z33 Z34 INFINITI G37
Advantages — HARDRACE Spherical Bearings Rear Knuckle Bushes (8pc)
(Compatible: Nissan GT-R R35, 350Z Z33/Z34, Infiniti G37)
- Far stiffer, more precise rear suspension geometry.
Spherical bearings virtually eliminate the rubber compliance of stock bushes, so the knuckle follows suspension kinematics exactly — improves camber and toe control under load. - Sharper steering and better turn-in.
With less bushing deflection the rear reacts faster to driver inputs and chassis loads, giving a more direct, predictable rear end during corner entry and transitions. - Improved cornering stability and traction.
Consistent geometry under high lateral and braking loads keeps the tyre contact patch more stable, which helps grip and reduces mid-corner understeer or unpredictable rear behaviour. - Repeatable alignment and easier setup.
Because spherical bearings don’t “wander” like worn rubber, alignment settings (camber/toe) remain consistent lap after lap — useful for track tuning and corner balancing. - Durability under performance use.
Hardened steel/PTFE-lined spherical units tolerate higher loads and heat than soft bushes, so they last longer in motorsport or aggressive driving conditions when properly maintained. - Quicker, crisper feedback to the driver.
Road and track feedback through the suspension is less filtered by compliant bushes — improves driver confidence and quicker reaction to traction limits. - Lightweight and compact.
Many spherical bush kits are lighter than heavy OEM rubber or polyurethane knuckle assemblies, contributing slightly to reduced unsprung mass and quicker suspension response. - Adjustability & serviceability (depending on kit).
Some kits allow preload adjustment or are greaseable/ replaceable which makes long-term maintenance and fine tuning easier than a bonded rubber part.
Quick practical notes:
- These are a performance upgrade—expect a firmer, more mechanical ride and slightly more noise/vibration transmitted into the car compared with stock rubber bushes.
- Spherical bearings need periodic inspection/greasing if the design supports it; neglected bearings can wear or become noisy.
- Installation should be done with proper tools and alignment afterwards; if used on the street, choose quality PTFE-lined units (not bare metal-on-metal) to reduce noise and wear.

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