diff --git a/selfdrive/car/interfaces.py b/selfdrive/car/interfaces.py
index 0a2d978004..0a5ec94aa0 100644
--- a/selfdrive/car/interfaces.py
+++ b/selfdrive/car/interfaces.py
@@ -4,7 +4,7 @@ import numpy as np
 import tomllib
 from abc import abstractmethod, ABC
 from enum import StrEnum
-from typing import Any, NamedTuple, cast
+from typing import Any, NamedTuple
 from collections.abc import Callable
 
 from cereal import car
@@ -13,7 +13,7 @@ from openpilot.common.conversions import Conversions as CV
 from openpilot.common.simple_kalman import KF1D, get_kalman_gain
 from openpilot.common.numpy_fast import clip
 from openpilot.common.realtime import DT_CTRL
-from openpilot.selfdrive.car import PlatformConfig, apply_hysteresis, gen_empty_fingerprint, scale_rot_inertia, scale_tire_stiffness, STD_CARGO_KG
+from openpilot.selfdrive.car import apply_hysteresis, gen_empty_fingerprint, scale_rot_inertia, scale_tire_stiffness, STD_CARGO_KG
 from openpilot.selfdrive.car.values import Platform
 from openpilot.selfdrive.controls.lib.drive_helpers import V_CRUISE_MAX, get_friction
 from openpilot.selfdrive.controls.lib.events import Events
@@ -113,14 +113,13 @@ class CarInterfaceBase(ABC):
     ret = CarInterfaceBase.get_std_params(candidate)
 
     if hasattr(candidate, "config"):
-      platform_config = cast(PlatformConfig, candidate.config)
-      if platform_config.specs is not None:
-        ret.mass = platform_config.specs.mass
-        ret.wheelbase = platform_config.specs.wheelbase
-        ret.steerRatio = platform_config.specs.steerRatio
-        ret.centerToFront = ret.wheelbase * platform_config.specs.centerToFrontRatio
-        ret.minEnableSpeed = platform_config.specs.minEnableSpeed
-        ret.minSteerSpeed = platform_config.specs.minSteerSpeed
+      if candidate.config.specs is not None:
+        ret.mass = candidate.config.specs.mass
+        ret.wheelbase = candidate.config.specs.wheelbase
+        ret.steerRatio = candidate.config.specs.steerRatio
+        ret.centerToFront = ret.wheelbase * candidate.config.specs.centerToFrontRatio
+        ret.minEnableSpeed = candidate.config.specs.minEnableSpeed
+        ret.minSteerSpeed = candidate.config.specs.minSteerSpeed
 
     ret = cls._get_params(ret, candidate, fingerprint, car_fw, experimental_long, docs)