Trailer Brake Drum Only 9-10K Axle 12-1/4×3-3/8 Dexter 9-123 After 2009

9,000–10,000 lb Trailer Brake Drum Only — 12-1/4″ x 3-3/8″ — Dexter Post-2009 Style

This is a direct-fit replacement brake drum for Dexter-style 9K–10K General Duty trailer axles built after July 2009, cross-referenced to genuine Dexter part 009-123-01. Commonly used on flatbed, equipment, and dual tandem trailers.

The drum measures 12-1/4″ in diameter by 3-3/8″ wide and is compatible with both electric and hydraulic brake assemblies of that size. It’s designed to pair with Dexter’s newer two-piece hub-and-drum system — this drum mounts to a separate hub rather than being cast as one piece with it.

Important Drum Only, Confirm Your Hub: –
This listing is for the drum only — it does not include a hub, bearings, races, or seal. The drum mounts to the hub using 8 bolt holes on a 7-1/2″ circle — a separate spec from your wheel’s lug bolt pattern (typically 8 on 6.5″), so don’t confuse the two when checking fitment. If you’re replacing an older one-piece 8-415 hub/drum casting, you’ll also need to install a matching Dexter 008-430-03 style hub to use this drum.

Fitment Note: This drum is for axles manufactured after July 2009. If your axle predates July 2009, you’ll need the earlier-style drum instead (see our other listing for 99-86510-44 pre-2009 hub/drum).

Compatible With / Cross Reference:

• Dexter® 009-123-01, 9-123-1, 008-415-00
• MAT (Miller) 99-123-01
• Fits Dexter idler hubs 008-430-03 / MAT 88-430-03