Wheels, 18 x 9 front and 18 x 9.5 rear, forged alloy, polished face

Years 2018, 2025–26 Models 2 Factory citations 3

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Also described as Wheels, 18 inch (45.7 cm) alloy, Polished/Dark Android finish

Documented applications

ATS — Alpha (2013–2019)

2018 Factory-verified

only in: ATS-V

GM factory document — 2018 cadillac ats v fleet order guide wayback, p.3.

CT4 — Alpha 2 (2020–2026)

2025–2026 Factory-verified

only in: CT4-V and CT4-V Blackwing; V-Series Blackwing: S; the 2025 CT4-V list reads "aluminum alloy"

GM factory document — 2025 cadillac ct4 v ct4 v blackwing fleet order guide, p.9.
GM factory document — 2026 cadillac ct4 v ct4 v blackwing fleet order guide, p.7.

This page aggregates every documented appearance of R38 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.