Overview
The Baer Brakes 4301390GB is a front disc brake kit for half-ton Chevrolet and GMC C10-series trucks built from 1960 through 1989. Its caliper is a Grabber Blue six-piston monoblock unit mounted to a 14 inch rotor, and the 2.5 inch drop modular spindle that the setup depends on is not included in the box.
Fitment is limited to two-wheel-drive trucks in the manufacturer list, which names Chevrolet C10 and Suburban models and GMC 1000, C15 and C1500 trucks. Wheels of 18 inch or larger suit this rotor, so confirm wheel size before purchase.
Key features
- Six-piston monoblock caliper, designated 6S, made in Phoenix, Az.
- Caliper machined from U.S. sourced 2618 aluminum forging with a powder coated Grabber Blue finish.
- Stainless steel pistons, abutments and noise suppression clips.
- Staggered pistons help even out pad wear.
- Dual dust, weather and pressure seals.
- Slotted, drilled, zinc-plated two-piece rotor with a billet aluminum hat.
- Billet hubs with premium bearings and Redline synthetic grease.
Setting up the front end
Front disc brakes on an older truck work as a system. The caliper clamps the rotor, the hub carries the wheel bearings, and the spindle holds the whole assembly in position. When one part changes, the others see new loads, so a brake upgrade is a good time to check ball joint wear, tie rod ends and the condition of the wheel bearings.
Pads and rotors are usually replaced together, because a new pad will not seat properly against a worn rotor face. Keep the friction surfaces clean during installation and avoid touching the pad material with bare hands. Bleed the hydraulic lines fully, since trapped air is a common cause of a soft pedal after a caliper swap.
On the road, a firm pedal with consistent stopping is the goal. Watch for a pedal that drops slowly under steady pressure, which can point to a leak or a failing seal, and listen for grinding, which means pads are worn past their useful life. Regular inspection at each oil change keeps the front end predictable over time.
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301390GB |
| UPC | 90127876459 |
| Axle | Front |
| Drive | 2WD |
| Caliper | 6S, 6-piston, fixed, monoblock |
| Caliper color | Grabber Blue |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.25 |
| Rotor construction | Vented, two-piece, slotted, drilled and zinc plated |
| Brake pad FMSI number | D1247 |
| Template | N117P |
| Minimum wheel diameter | 18.0 inch |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 inch |
| Wheel stud size | 1/2-20 x 2.25 inch |
| Hose material | Stainless steel |
| Spindle type | Cpp nodular iron 2.5 inch drop |
| Spindles included | No |
| Country of origin | USA |
Vehicle fitment
Manufacturer fitment data for this kit names 1960–1986 Chevrolet C10, 1967–1986 Chevrolet C10 Suburban, 1960–1966 and 1987–1989 Chevrolet Suburban, 1966 GMC 1000, 1960–1965 GMC 1000 Series, 1975–1978 GMC C15, 1967–1974 GMC C15/C1500 and 1979–1986 GMC C1500.
Four-wheel-drive and 1990-and-later trucks do not appear in this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors ship pre-assembled with stainless hardware, and billet hubs come with bearings packed in synthetic grease. Mounting brackets, stainless braided hoses and hardware are supplied. The 2.5 inch drop spindles are a separate purchase and need to be in place before the brake components are mounted. Verify clearance with template N117P before choosing wheels.
What’s included
The box holds the 6S monoblock caliper, two-piece slotted and drilled rotors, billet hubs with bearings, stainless braided hoses, mounting brackets and hardware.
Not included: 2.5 inch drop modular spindles.
