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The Tein Basic full coilover system is designed as a high performance autocross and track suspension that is still capable of providing a comfortable street ride.

Pronounced like "rain"  Learn more about Tein technology

Features

  Adjustable spring collar allows quick ride height adjustment. The body of the Basic is slightly shorter than the OE shock. This shortened body allows you to lower the car and still retain full wheel travel. No more bouncing off the bumpstops!

Tuning

  The standard Basic sping rates are 7/6kg, equivalent to 396 in/lbs front, 340 in/lbs rear. In comparison, the original equipment spring rates on the 90-05 Miata are around 155in/lbs front, 110 in/lbs rear. The OE Miata suspension is designed to compress fully onto the elastomer bumpstops in hard cornering. Mazda did this to give a very soft straight line ride considering the weight of the car. The problem with this approach, as you already know, is huge body lean angles in hard cornering, excessive nose dive under braking and much slowed transitional behavior. The other problem with the soft OE spring is that if you lower the car much more than 1" you are really compressing the bumpstops and you get some inconsistent handling balance, poor ride quality and very "twitchy" behavior cornering on bumpy pavement. Even with aftermarket springs and separate coilovers that are between 175# and 350# rates you're still on the bumpstops when it's parked, which is not ideal. The effective spring rates in the Basic are actually a little lower than the effective spring rate of a compressed stock Miata suspension if you take into account the stiffness of the OE bumpstop under hard cornering on smooth pavement. This is how the Basic can handle really bad pavement and still keep the tire glued to the road.

  For a daily driver and occasional drifting, autocross or track days, the standard Basic 7/6kg springs are great. For a more comfort oriented setup I recommend decreasing the front spring rate between 6kg-5kg/336-280# and rear spring between 5-3kg/280-170# ($40 per spring). Custom valving available for $130 per shock.

For a no fuss installation, set them up exactly how the included instructions show and you'll have an awesome street/track high performance suspension.

• Ride height adjustable
• Teflon coating for rust prevention
• Special spring seat and spring seat lock for easy height adjusting
• Optional pillow ball upper mounts 
• Easily overhauled or custom valved at Tein's US facility in California (we drive there once or twice a week to pick up stuff)

Additional Information