RS-R (Sport Service RS★R) is a Japanese suspension brand founded in Osaka, with a long history of supplying high-quality springs, coilovers, and full suspension systems designed for enthusiasts who want performance, stance, or show quality. Their products balance drop height, handling, durability, and ride comfort across series tailored for different uses.

Core Product Lines & Key Features

Down / Super Down / Hard Down / Hi-Road Series Springs
RS-R offers multiple spring lines:
• Down — moderate drop with maintained comfort.
• Super Down — much lower ride height, primarily for show/demo cars. Not always suitable for rough roads.
• Hard Down — more aggressive spring rates, stiffer ride, better handling under spirited driving / track conditions.
• Hi-Road / Half Down — less aggressive drop, more comfort-leaning.
Coilovers & Adjustable Suites
RS-R also produces coilover systems (including active / “Best-i / Jouge / Active” lines) and full suspension kits, allowing adjustable ride height and sometimes damping depending on model.
Ti2000 Series Springs
A high material grade RS-R uses: Ti2000 alloy, which incorporates titanium and other alloying elements to improve durability, corrosion resistance, and performance under stress. These springs are lighter, resistant to fatigue, and retain strength under repeated use.
Warranty & Durability
RS-R offers warranty on many of its spring / suspension lines. For example, their RS*R series springs come with a 3-year / 50,000 km limited warranty.
Materials & Manufacturing
They emphasize high-quality alloys, specialized spring coiling, strict heat treatment, corrosion resistant coatings. Also, when using higher grade materials (like the Ti2000), they push for performance with less compromise on longevity.

Why Builders & Enthusiasts Choose RS-R

They offer strong drop / stance options without completely compromising ride quality. For those who want appearance + performance, RS-R has many balanced choices.
Material quality: Using better alloy springs, better coatings, etc., reduces sag, noise, and failure under repeated load.
Wide model fitment: RS-R has offerings for many Japanese cars, imports, and frequently updated with new vehicle supports.
Support and warranty: A 3-year / 50,000 km warranty on many spring products gives peace of mind.

Why Carry RS-R at Kinetic Autoworks

By including RS-R in your catalog, you give customers:

Multiple choices of suspension style (show / drop / track) under one brand.
A go-to name for Japanese/import-centric builds where RS-R brand recognition matters.
A line with good materials so fallback issues (rusting, sagging, fatigue) are minimized.
Options for customers wanting either daily comfort or show-car stance without jumping to full race suspension systems.

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