The front rotors on a 2018 Nissan Altima are typically 12.0 inches in diameter, while the rear rotors are usually around 11.0 to 11.3 inches. Exact sizes can vary by trim and braking package, so it’s best to confirm with the vehicle’s VIN or official Nissan specifications.
Front rotors
Before listing the sizes, note that the front brakes use ventilated discs, a common arrangement for the Altima’s braking system across most trims.
- 12.0 inches (304 mm) in diameter
In most 2018 Altima models, the front rotor diameter is standardized, with the size remaining consistent across the main trims. If you are replacing rotors, verify the exact part number for your specific configuration to ensure compatibility.
Rear rotors
Rear rotor sizes are generally smaller than the fronts and can vary slightly by trim or option package. The Altima’s rear brakes are typically disc rotors rather than drums.
- Typically 11.0 to 11.3 inches (279 to 287 mm) in diameter
While most 2018 Altima rear rotors fall within this range, some variations may occur depending on market and production specifics. Always double-check with Nissan’s official parts catalog or your VIN-based build sheet for precision.
Notes on verification and compatibility
If you’re replacing rotors, use the exact part numbers recommended for your VIN. Measurements alone can differ due to production batches, trim levels, or special editions. When in doubt, consult a Nissan dealer or a trusted auto shop with access to OEM specifications.
Additional considerations
Beyond diameter, rotor replacement should consider rotor thickness, vented vs. solid design, and compatibility with the existing calipers and pads. For performance-oriented braking upgrades, some owners opt for higher-performance rotors, but these must be compatible with the Altima’s caliper and wheel fitment.
Summary
For the 2018 Nissan Altima, expect front rotors around 12.0 inches in diameter and rear rotors roughly 11.0 to 11.3 inches. Sizes are generally consistent across trims, but exact specifications can vary by model and market. Always verify with the VIN or official parts catalogs to ensure a precise match when ordering replacements.