The H&R 29187 is a set of four progressive lowering springs for the 2008-2013 BMW 1 Series E82 coupe and E88 convertible, sized for the 128i and 135i. The coils are wound from 54SiCr6 spring steel and shot-peened, and H&R's published documentation references TÜV and ISO 9001 certification. Compared with the OE sport spring, this set lowers the car roughly twice as far, cutting wheel-to-fender gap and lowering the center of gravity for more composed cornering. The progressive rate keeps the daily ride reasonably compliant, which is the main reason to choose it over the firmer Super Sport kit. Buyers searching for an E82 128i sport spring, 135i lowering springs, or 1 Series track-day handling upgrade will find this set matches a street car that sees occasional track use. Owners on user forums report the drop settles over the first few hundred miles, and recommend a wheel alignment afterward. Fitment varies by engine, model, and factory sport suspension, so confirm your VIN-specific application before ordering.
Listings for the 135is are limited to 2013 models, and the lowering figures for that trim are noticeably smaller than the 128i/135i figures. Confirm the 135is application and expected drop with the manufacturer before ordering.
Published figures are approximate, and results vary with engine, model, and factory sport suspension. Owners on user forums have reported the front settling further in the first few hundred miles, so judge the final height after the car has been driven for a while.
Owners on user forums consistently recommend a wheel alignment after the springs are installed, and some suggest scheduling it a few weeks after the install once the springs have settled.
This is a spring-only swap, and owners on user forums have completed it at home over a weekend with basic hand tools and a set of spring compressors. Support the car securely, compress each spring before removing the strut or spring-seat hardware, and double-check that every spring seats fully before reassembly. Plan on a professional alignment afterward, since the geometry changes with the new ride height. Factory sport suspension setups, such as Adaptive Drive, can change the final result, so check ride height before and after installation.
