After nearly 2 years in development, countless prototypes and revisions we have a lightweight yet strong drop knuckle for the S/R/Z32 chassis Nissan's. They come with dual caliper brackets as standard, high-quality PTFE lined spherical bearings throughout and have all new kinematics to drastically improve anti-squat, bump steer, camber gain curves and raised roll center height.
- Ability to run dual caliper without spacing the rotor out
- Ability to run drum brake in standard position with dual calipers (or single caliper) installed
- The drop is 40 mm - optimized for cars 40 mm lower than factory ride height (more drop would have required proprietary arms)
- High-quality PTFE lined spherical bearings throughout as standard, common bearing size so replacements are easy to get and affordable (QA1/FK part #COM10T)
- All new kinematics to significantly increase grip over regular drop knuckles
- Optimized camber curve for more even tyre wear
- Optimized bump steer for toe-in under compression without OEM arms' elastokinematics
- Increased anti-squat for more rear weight transfer and traction
- Raised roll center height for better handling
- Lightweight sheet metal design optimized using finite element analyses for ultimate strength - fully dressed weight (bearings, spacers, circlips) 4.1kg (standard knuckle is 5.1kg)
- Clearance for larger GTR drive shafts
- To be mounted with bearing mounting holes perpendicular to the ground in static height (extended LCA's that push the wheel out to the rear of the wheel arch will NOT work well, or at all if extended too far out). Note that our rear LCA's adjust perpendicular to the centerline of the car, which makes sense.
- Will fit all GTR and Z32 chassis' with the use of an S chassis style lower coilover mounting.
- Will clear 17" rims (and even 16" rims with low offsets) and all 18" rims but please note that the closer the rim sits in the wheel-well, the greater the chance that the toe arm mount will come close to hitting. A 17x10.5 +22 Enkei RPF1 wheel was tested and still has around 5 mm of clearance (ample)
- Aftermarket camber, toe and traction rods ARE required and MUST have rose joints as the suspension mounting points on the knuckle are in significantly altered and rubber or similar wouldn't have enough misalignment to work. Lower control arms can be OEM or aftermarket and do not need to be changed. OEM bushings in lower control arms will produce different bump steer curves
- The Wilwood dual caliper bracket that we offer do NOT fit on these knuckles
What makes these rear knuckles different to other drop knuckles?
Our rear knuckles are not just drop knuckles, they have different suspension arm mounting points which results in altered and improved camber curves and bump steer. This results in far more grip and very predicatble grip. Seperate to having all new kinematics these rear knuckles use spherical rose joints (a common size also incase you need to ever replace them), and have dual caliper brackets as standard.
Do these rear knuckles have clearance for GTR axles?
Yes, there is enough clearance for GTR axles.
Do you make these with a "fork" style strut mount?
We don't. We only make the version seen here.
How do I get the most out of these knuckles?
To get the most out of the kinematics improvements, an S14/S15/R33/R34 rear subframe is suggested. Alternatively, the lower control arm front pivot point can be moved up 50mm, if that has been done then suggested traction rod length for this is 225mm, measuring from centre hole to centre hole.
However, if you are running either;
S13/R32 subframe we recommend a traction arm length of 218mm measuring from centre hole to centre hole.
S14/S15/R33/R34 subframe we recommend a traction arm length of 203mm also measuring from centre hole to centre hole.
Do you make these with brake mounts to suit Wilwood calipers?
At present we are only making the 1 version of the rear knuckles which is for dual 2 pot Nissan calipers (R32, R33, R34, Z32 etc.).
Will these fit my car?
We can only confirm fitment for the vehicles listed above under "confirmed fitment" however also take note that as mentioned in the product description aftermarket traction, toe and camber arms are required and they must have rose joints for misalignment.
How long is the warranty on these rear knuckles?
All GKTECH suspension products come with a lifetime warranty against manufacturing defects. This does not include crashes (it's pretty easy to tell the difference between a crack caused by impact as opposed to a stress fracture) and the Teflon lined rose joints come with a 1 year replacement warranty. We stock spare bearings so even after the 12 months is up we can still help with replacements, worse case scenario they're a 5/8" spherical bearings and are readily available through your local autoshop.
Are these rear knuckles legal for use on street cars?
Our understanding is that any suspension arm with a spherical bearing is not legal for street use in Australia. However we do recommend that you contact your local RTA for clarification/confirmation. Whether you use these on public roads is at your discretion and we will not be held resonsible for the outcome.