Independent · Source-led · American performance history Issue 01 · 1951–2023
American Muscle Car Facts

Showroom arguments.
Race-bred answers.

General Motors option code

QRM  — GR70x15 steel belted radial tires

QRM (GR70x15 steel belted radial tires): a General Motors factory option code recorded on 1 model across 1973, with installs and price where a source states them.

1 model · 1 model year · 1 source

Dark maroon Chevrolet Chevelle Malibu Colonnade hardtop coupe at a street car show, low front three-quarter with the hood raised, showing the single headlamps, bow-tie grille, Malibu fender script and aftermarket wheels
Shown: 1973-1974 Chevrolet Chevelle Malibu Colonnade coupe in dark maroon, hood open Photo: Bull-Doser, public domain, via Wikimedia Commons

Every sourced appearance

Year Model As named that year Price Installs
1973 Chevrolet Chevelle and Malibu SS GR70x15 steel belted radial tires RPO Unknown 271,254 Reported

Every row traces to the source it links from on that model's own year page; this table only collects them in one place.