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ACDelco 18B255 | Rear Brake Drum
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ACDelco 18B255 | Rear Brake Drum

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$74.99
Part Number
ACD18B255
UPC:
707773350850
Condition:
New
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Description

ACDelco Professional Brake Drums are constructed with G3000 SAE qualified material for structural integrity and maximum service life. They are tested to ISO/TS 16949 quality system standards and validated for balance to provide better braking performance. Chamfer angle, vane configuration, and plate thickness all follow the OE design, making them a premium aftermarket replacement for your GM and non-GM vehicle. Also, no machining is required. ACDelco Professional Brake Drums are ready to be installed right out of the box. ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

BRAND: ACDelco

FEATURES:

  • brake-pad;-brake-shoe;rotors;drum;brake-job;front-brake;rear-brake;cylider;hydraluic;dot-3;dot-4;front-brakes;rear-brakes;brake-set;breaks
  • Chevrolet;GMC
  • Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reducing noise and vibration
  • Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products
  • Inspected for balance; resulting in smooth brake operation and noise reduction
  • Rear Brake Drum

SPECIFICS:

Bolt Circle Diameter (in)5.5
Bolt Circle Diameter (mm)139.7
Center Bore Diameter (in)3.57 in
Center Bore Diameter (mm)90.6 mm
Discard Thickness (in)11.21
Discard Thickness (mm)284.7
FAQ - Answer 1No, but it is a good idea to inspect them for wear-out, cracking, leaking etc.
FAQ - Answer 2Yes, ACDelco also offers GM OE and Advantage brake drums.
FAQ - Answer 3No, but it is a good idea to inspect them at every tire rotation.
FAQ - Question 1Do I have to replace all my brake parts when replacing my brake drums?
FAQ - Question 2Does ACDelco offer other grades of brake drums?
FAQ - Question 3Do I have to replace my brake drums after a certain amount of time?
Good Maintenance Practices - Section 1 - Bullet 1Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
Good Maintenance Practices - Section 1 - Bullet 2Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
Good Maintenance Practices - Section 1 - Bullet 3Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
Good Maintenance Practices - Section 1 - Bullet 4Check the thickness of your brake pads.
Good Maintenance Practices - Section 1 - HeaderThe following inspections and maintenance procedures can help prevent potential brake problems:
Good Maintenance Practices - Section 2 - Bullet 1Inspection of the brake hoses for brittleness or cracking.
Good Maintenance Practices - Section 2 - Bullet 2Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
Good Maintenance Practices - Section 2 - Bullet 3Inspection of wheel bearings and grease seals.
Good Maintenance Practices - Section 2 - Bullet 4Parking brake adjustments (as needed).
Good Maintenance Practices - Section 2 - HeaderThe following should be conducted by a qualified technician:
Grade TypeRegular
Height (in)4.38
Length (in)11.21
Measurements11 5/32 X 2 3/4 in
Mount Hole Diameter (in)0.456 in
Mount Hole Diameter (mm)11.582 mm
Programming RequiredNo
Signs of Wear & Troubleshooting - Section 1 - Bullet 1Squealing or scraping noises.
Signs of Wear & Troubleshooting - Section 1 - Bullet 2Brake pedal pulsation (not to be confused with normal ABS operation).
Width (in)14.12

APPLICATIONS:

  • 1974-1974 Chevrolet Blazer - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1987-1991 GMC V1500 Suburban - Position: Rear
  • 1979-1986 GMC K1500 Suburban - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1975-1986 Chevrolet K5 Blazer - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1990-1991 Chevrolet Blazer - Position: Rear
  • 1975-1975 Chevrolet K10 - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1975-1975 GMC K15 - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1971-1974 Chevrolet K10 Pickup - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1987-1987 GMC V1500 - Position: Rear
  • 1971-1974 GMC K15/K1500 Pickup - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1974-1989 GMC Jimmy - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1989-1991 Chevrolet V1500 Suburban - Position: Rear
  • 1976-1986 Chevrolet K10 - Position: Rear
  • 1976-1978 GMC K15 - Position: Rear
  • 1990-1991 GMC Jimmy - Position: Rear
  • 1975-1978 GMC K15 Suburban - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1979-1986 GMC K1500 - Position: Rear
  • 1971-1974 GMC K15/K1500 Suburban - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1987-1987 Chevrolet V10 - Position: Rear
  • 1987-1989 Chevrolet Blazer - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1971-1986 Chevrolet K10 Suburban - Position: Rear
    • 11 5/32" X 2 3/4" Brake Shoe
  • 1987-1988 Chevrolet V10 Suburban - Position: Rear

Attributes
Product type:
Aftermarket
Brand Description:
Rear Brake Drum
Grade Type:
Regular
Bolt Hole Quantity:
6
Outside Diameter (Inch):
13.34
Material:
Cast Iron
Programming Required:
No
Brake Surface Finish:
Turned
Outer Cooling Fins:
Yes
Nominal Drum Diameter (Inch):
11.2
Measurements:
11 5/32 X 2 3/4 in
Hazardous Material:
No
Minimum Order Quantity:
1
Features & Benefits - Bullet 2:
Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products
Features & Benefits - Bullet 3:
Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reducing noise and vibration
Features & Benefits - Bullet 1:
Inspected for balance; resulting in smooth brake operation and noise reduction
Weight (lb) (Pound):
29.2
Height (in) (Inch):
4.38
Width (in) (Inch):
14.12
Length (in) (Inch):
11.21
Signs of Wear & Troubleshooting - Section 1 - Bull:
Brake pedal pulsation (not to be confused with normal ABS operation).
Life Cycle Status:
Announced
Signs of Wear & Troubleshooting - Section 1 - Bull:
Squealing or scraping noises.
Life Cycle Status Description:
Announced - Part has been announced to customers on a paper “New Number Announcement”. Part is active.
FAQ - Answer 2:
Yes, ACDelco also offers GM OE and Advantage brake drums.
Item Level GTIN:
00707773350850
FAQ - Question 3:
Do I have to replace my brake drums after a certain amount of time?
FAQ - Question 1:
Do I have to replace all my brake parts when replacing my brake drums?
FAQ - Question 2:
Does ACDelco offer other grades of brake drums?
FAQ - Answer 1:
No, but it is a good idea to inspect them for wear-out, cracking, leaking etc.
Good Maintenance Practices - Section 1 - Bullet 1:
Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
Good Maintenance Practices - Section 1 - Bullet 2:
Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
Good Maintenance Practices - Section 1 - Bullet 3:
Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
Good Maintenance Practices - Section 1 - Bullet 4:
Check the thickness of your brake pads.
FAQ - Answer 3:
No, but it is a good idea to inspect them at every tire rotation.
Good Maintenance Practices - Section 1 - Header:
The following inspections and maintenance procedures can help prevent potential brake problems:
Good Maintenance Practices - Section 2 - Bullet 1:
Inspection of the brake hoses for brittleness or cracking.
Good Maintenance Practices - Section 2 - Bullet 2:
Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
Good Maintenance Practices - Section 2 - Bullet 3:
Inspection of wheel bearings and grease seals.
Good Maintenance Practices - Section 2 - Bullet 4:
Parking brake adjustments (as needed).
Outside Diameter (Millimeter):
338.8
Good Maintenance Practices - Section 2 - Header:
The following should be conducted by a qualified technician:
Mount Hole Diameter (in):
0.456 in
Mount Hole Diameter (mm):
11.582 mm
Center Bore Diameter (in):
3.57 in
Center Bore Diameter (mm):
90.6 mm
Bolt Circle Diameter (in) (Inch):
5.5
Bolt Circle Diameter (mm) (Millimeter):
139.7
ABS Sensor Ring Included:
No
Discard Thickness (in) (Inch):
11.21
Nominal Drum Diameter (Millimeter):
284.5
Discard Thickness (mm) (Millimeter):
284.7
Maximum Brake Diameter (Discard) (Millimeter):
284.73
Country of Origin:
China
Weight - Each (Gross Pounds):
29.20
Height - Each (Inch):
04.38
Length - Each (Inch):
14.12
Width - Each (Inch):
14.12



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