Brakes & Wheel End
Cast vs Lightweight Brake Drums for Class 8 (2026)
Quick answer
Cast brake drums remain the fleet default for durability and heat capacity on drive axles; lightweight drums can save unsprung weight on steer positions where permitted. Match diameter, width, and bolt circle to your existing drum — 16.5×7 is the most common Class 8 drive spec.
Our top picks
Comparison
| 151.6712TR - BRAKE DRUM 16.500''X7.000'' | 151.6504BA - Brake Drum 16.500in X 5.000in | 68730 - BRAKE DRUM | |
|---|---|---|---|
| Live price | $324.25 | $439.82 | $207.67 |
| SKU | 151.6712TR | 151.6504BA | 68730 |
| Size | 16.5" × 7" | 16.5" × 5" | Standard fleet drum |
| Typical use | Drive axle | Steer / tag | General replacement |
| Weight profile | Standard cast | Narrow / lighter | Standard cast |
Our data
This guide uses live prices from the PartsNow catalog (~16,900 SKUs). Prices shown reflect current sell pricing with standard markup. We rank by fleet relevance, catalog availability, and common Class 8 replacement patterns — always confirm exact fitment with your part number before ordering.