HKS HIPERMAX R NA/NB MIATA FULL KIT

The Roadster's suspension has been refined with cutting-edge
technology to deliver both everyday comfort and sharp,
responsive cornering. Spring rates and damping force have
been pushed to the limit for a sporty, lightweight feel on winding
roads and circuits.
 The specially designed “LVS” springs offer more flexibility than
their set rate, providing a smooth ride in the city and firm, stable
handling during spirited driving—even at the limit.
 A front spring retainer reduces side forces, allowing smoother
suspension movement and better road tracking. In the rear, a
helper spring ensures enough extension stroke to maximize
inner rear tire grip during circuit runs.
 Tested at Fuji Speedway with A052 tires, the recommended

damper settings are 10 clicks front, 12 clicks rear. This height-
adjustable kit unleashes the full potential of the Roadster,

whether on the street or the track.

Spring Rate
[N/mm(kgf/mm)]

F=118(12) /
R=118(12)
Spring Length (mm) F=150(Straight) /
R=150(Straight)

Present Height(mm)
(Upper Limit /
Lower Limit)
※For NA8C

F=-18(+1 / -63) /
R=-24(+1 / -67)

Upper Mount F=Pillow ball /
R=Pillow ball

Adjustable Spring
Rate when shipped
[N/mm(kgf/mm]

F=Available ±20 (2) /
R=Available ±20 (2)

JAN Code 4957266323755

Due to the NA/NB Roadster’s short rear suspension, it’s difficult to secure stroke. To address this, we omitted rear spring
retainers to create space for helper springs, maximizing rear extension stroke—crucial for FR traction and reducing abrupt
behavior common in short-wheelbase cars.
 The suspension is tuned slightly toward circuit driving,
with a focus on stability and control. For everyday city use,
setting the damping dial to 20–30 clicks offers
a more comfortable ride.
 We also offer a ±2K spring rate change service
front and rear. If you mainly drive on mini circuits,
use lower-grip tires than the A052s used in
testing, or prefer more active load transfer,
you can choose softer rates to match your driving
style.
 For NB models or cars with aftermarket reinforced
front upper arms, check for possible contact
between the damper and reinforcement. If
necessary, adjust camber or take other steps to
avoid interference during installation.