Kodiak 13" Disc Brake Kit 8-Lug 7,000 lb Dacromet Two-Wheel Set Cap Style Rotor
A corrosion-resistant over-the-hub Kodiak two-wheel disc brake kit built for 7K trailer axles using 8 on 6.5" hubs with 1/2" studs. Loaded calipers, vented 13" rotors, and 5-bolt brackets make this a strong upgrade path from idler or drum setups.
Overview
This Kodiak two-wheel disc brake kit is designed for 7,000 lb trailer axle applications using an 865 idler hub, 1/2" wheel studs, an 8-lug on 6.5" bolt pattern, and a 5-bolt brake flange. The kit includes vented 13" Dacromet-coated cap style rotors, loaded Dacromet-coated #250 calipers with ceramic pads, and matching Dacromet-coated mounting brackets. It is a practical choice for trailer owners who want stronger, more consistent braking performance than typical drum systems, especially at highway speeds.
R&P Service Insight
Disc brake conversions are popular because they simplify service and improve braking confidence. This over-the-hub design also makes future rotor replacement easier when compared with one-piece hub-and-rotor assemblies.
- Brake Response: Disc brakes generally maintain more consistent braking torque at speed and can reduce stopping distance compared with drum brakes.
- Serviceability: Because the rotor is separate from the hub, a failed rotor does not automatically force replacement of the hub if the hub remains usable.
- Fit Check: Verify 5-bolt brake flange configuration, 1/2" wheel studs, 8 on 6.5" bolt pattern, and 16" or larger wheel clearance before ordering.
Product Video
Take a closer look at this Kodiak 13" Dacromet disc brake kit and its overall layout before installation.
R&P Knowledge Hub
Compatibility: Designed around 7K axle applications with a 5-bolt brake flange and an 865 idler hub using 1/2" diameter studs on an 8-lug 6.5" bolt circle.
Vehicle / System Fit: Trailer axle disc brake conversion or replacement setup using Kodiak cap style over-the-hub rotors and #250 calipers.
Installation Notes: This cap style rotor fits over the hub and is held in place by the wheel and lug nuts. Wheel stud thread length should be checked because the rotor adds stack thickness.
Performance Insight: The vented rotor helps manage heat, the stainless 2-1/4" piston increases torque over standard pistons, and ceramic pads with stainless clips are intended for longer life and stable performance.
R&P Repair Insight
Over-the-hub rotor kits are often easier to live with in real trailer service because the rotor can be removed after the wheel and caliper are off, and the hub and rotor do not have to be replaced as a single piece. Before installation, the biggest sources of trouble are usually flange mismatch, stud/thread concerns, and wheel clearance assumptions.
- Flange Verification: Confirm your axle uses a 5-bolt brake flange. The included caliper brackets are built for that mounting style.
- Wheel Clearance: This setup is stated to fit inside 16" and larger wheels. Do not assume all wheels clear the caliper without checking profile and inside diameter.
- Hub Face Change: Installing an over-the-hub rotor effectively increases overall hub-face-to-hub-face dimension by about 1/2".
Features
13" Vented Cap Style Rotors
Dacromet-coated cast iron rotors are vented to dissipate heat and are built as over-the-hub assemblies for easier future service.
Loaded #250 Calipers
Dacromet-coated calipers include ceramic brake pads with stainless steel clips, plus stainless guide bolts with thread lock and brass bleeder ports.
2-1/4" Stainless Piston
The stainless steel piston is described as 30% larger than standard pistons to increase braking torque and improve stopping performance.
Universal Two-Wheel Box
The kit includes two complete wheel-end assemblies per box, and the caliper orientation is universal for left or right side use.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 2/RCM-133-7-8-DAC |
| Alternate Dexter Number | 2/R-133-7-8-DDD-K |
| Product Type | Trailer disc brake two-wheel kit |
| Rotor Style | 13" cap style over-the-hub rotor |
| Axle Rating | 7,000 lbs |
| Bolt Pattern | 8 lug on 6.5" wheel bolt pattern |
| Stud Size | Fits 1/2" diameter studs |
| Material / Finish | Dacromet-coated rotors, calipers, and mounting brackets |
| Caliper Piston | 2-1/4" stainless steel piston |
| Brake Pads | Ceramic pads with stainless steel clips |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Trailer axle hydraulic disc brake application |
| Primary Fit | 7K axles with 5-bolt brake flange and 865 idler hub |
| Wheel Fit | Fits inside 16" and larger wheels |
| Rotor Mounting | Over the hub; wheel and lug nuts retain the rotor in place |
| Ordering Notes | Check flange style, hub family, wheel stud size, wheel clearance, and available wheel stud thread length before installation. |
Included Components
| Quantity | Item |
|---|---|
| 2 | Dacromet-coated 13" cap style vented rotors |
| 2 | Dacromet-coated #250 loaded calipers for 13" rotors |
| 2 | Dacromet-coated 5-bolt caliper mounting brackets for 7K axles |
| Included | Ceramic brake pads with stainless steel clips installed in the calipers |
| Included | Stainless steel guide bolts with thread lock installed and brass bleeder ports |
