Apparatus and method for determining shock-absorber wear are presented. The device includes a shock absorber, a temperature sensor, and an electronics assembly. The temperature sensor may generate temperature data for the shock absorber. The electronics assembly may determine a condition of the shock absorber based on the temperature data. The temperature sensor may be inside, on the surface, or nearby the shock absorber. A condition of the shock absorber, such as a shock-wear value or a remaining useful life (RUL) is determined, based on the temperature data. A shock-wear state may be determined by comparing the shock-wear value to one or more thresholds. A shock-wear indicator and/or a combined indicator may indicate the shock-wear value, RUL, and/or the shock-wear state.