Abstract: A replaceable wheel lock-up indicator attaches to an outer edge of a rim of a wheel of a vehicle. The indicator has a mount for mounting the indicator to the outer edge and a neck for extending a highly visible resilient planer flag beyond a plane defined by a sidewall of the tire. The mount comprises a fluid passageway and a fluid drain for draining melt water away from the mount. The neck has an angle sufficient to position the flag substantially parallel to the plane defined by the sidewall permitting a planer indicator surface to be viewed by a driver seated in the driver's cabin of the vehicle. The indicator surface is contrasted against the sidewall of the tire for increasing visibility thereof.