Considering the use of larger tires/wheels and the lowered ride height, STREET BASIS uses twin-tube system, in pursuit of ride comfort on streets.

In order to maintain the ride quality on streets with rough spots here and there, a shock absorber has to have sufficient stroke, be low-frictional and move smoothly. As an oil chamber and a gas chamber are not arranged serially in a twin-tube system, it is easy to secure enough stroke. Also, low gas pressure keeps friction low.

Its smooth stroke movement makes it possible to follow rough and bumpy road surfaces quite well, offering supple ride at low speed and stable ride at high speed.

Exclusively-designed urethane bump rubber absorbs and softens the compression impact effectively, maintaining ride comfort when going over gaps etc and preventing the damper from bottoming out.

(Image shown is for wishbone/multi-link type suspensions. The shape differs for strut type suspensions. Some vehicle models use OE bump rubbers.)

After many years of research and study, TEIN has developed optimally-shaped dust boot made of most suitable material. Elastic & highly-durable dust boot effectively prevents damages to the piston rod and foreign substances from getting inside the shock absorber.

(Some vehicle models use OE dust boots.)

Improved oil seal and ring nut with dust-discharge groove on side are used. Such new and advanced parts improve the durability, preventing the contamination by foreign matters which can lead to the reduction of product life.

Final assembly of shock absorbers is done in the clean room, which is almost equivalent to operating room. Room pressure is kept under control to shut out dust & dirt and all workers entering the room must take air shower, to make sure all the assembly work is done in completely clean air, in order to maintain higher level of accuracy and reliability.

Shell case is coated with rich TEIN green powder paint. This powder paint has high coating film strength, is highly durable yet is low-pollution due to non-use of harmful solvent.

After the shot blasting pre-treatment, the patented "2-layer/1-bake" treatment using anti-rust powder paint is applied for superior durability and high corrosion resistance.

Non-welded adjustment threads are adopted for STREET BASIS. The existing welded structure can create a very fine gap which is difficult to paint and can cause rusting. To solve this, we put a little time and effort; shell case and threads are separately painted and coated then later assembled together.

For strut suspensions, sufficiently-thick ribbed plate is used for knuckle bracket to maintain high rigidity.

Brackets for brake hoses and ABS sensor harnesses etc are exclusively designed for each vehicle model for hassle-free installation.

Shell case is made of high-strength steel STKM13C and solidly-constructed for firm handling and stable ride.

STREET BASIS has adopted the new wrought aluminum spring seats and low-friction hard-resin thrust washers. These effectively reduces the friction with springs, caused during ride height adjustment, and makes it easier to adjust the ride height with pre-load on the springs.

Adjustment threads on shell case are treated with TEIN original self-developed "ZT coating". This specially formulated fluorine resin coating, with super low frictional properties, is tightly baked onto the surface, for keeping a smooth adjustment for a long period.

STREET BASIS kit includes one-of-a-kind user-friendly ride height adjusting wrench. It has a 12.7mm (1/2in) sq. hole for attaching spinner handle and/or torque wrench for tightening at high torque.

Included springs are made of high-tensile steel SAE9254 (tensile strength 200kgf/mm² or over) and cold formed for excellent resistance to sagging and for superior quality stability.

Surface is powder coated for superb protection against chipping & peeling, for high durability and for superior anti-corrosion performance.

High-quality spring can be used under various conditions without any worry.

The most suitable shape of spring (straight or barrel-shaped) is determined for each vehicle model, to provide wide ride height adjustable range and to secure sufficient stroke without compromising ride comfort.

Specially-formulated high-spec oil exhibits stable viscosity characteristics at any temperature; from low to high, to allow shock absorbers to stroke smoothly and to generate damping force stably under various conditions. The oil has superior anti-foaming characteristics hence the bubble cavitation and/or thermal degradation hardly occurs, making it even suitable for tough sport driving. The oil also does not deteriorate much with age, making it possible to maintain and deliver superior performance for the long term.

TEIN offers excellent after-sales service. Like most TEIN shock absorbers, STREET BASIS can be overhauled to restore its original performance. As TEIN shock absorbers can be fully disassembled, revalving service is also available to change damping force settings to meet customer's preference.

With the main focus on most modified ones, STREET BASIS is available for wide variety of vehicle models; from K-cars, compact cars, minivans, sport cars to import cars.