Commercial Truck Brake Shoe Identification Guide
Expert guide to identifying and selecting the right brake shoes for your commercial truck or trailer. Get accurate parts identification and professional brake service.
How to Identify Your Brake Shoes
Locate the Part Number
Look for stamped numbers on the brake shoe web or backing plate
- Check both the inner and outer surfaces
- Use a wire brush to clean if needed
- Look for OEM manufacturer markings
Measure the Lining
Measure width, length, and thickness of the friction material
- Use calipers for accurate measurements
- Measure at the thickest point
- Note any tapering or special shapes
Check the Web Pattern
Examine the metal backing plate design and hole patterns
- Count mounting holes
- Note web reinforcement patterns
- Check for special brackets or attachments
Verify Application
Cross-reference with vehicle specifications
- Check brake chamber size
- Verify axle specifications
- Confirm with parts catalog
Common Commercial Brake Shoe Sizes
| Part Number | Width | Length | Thickness | Common Applications |
|---|---|---|---|---|
| 4515Q | 4.5" | 15" | 0.625" | Medium duty trucks, delivery vehicles |
| 4707Q | 4.7" | 16.5" | 0.625" | Class 8 tractors, highway trucks |
| 4709Q | 4.7" | 16.5" | 0.750" | Severe duty, construction, mining |
| 4311Q | 4.3" | 11" | 0.625" | Semi trailers, heavy trailers |
| 4319Q | 4.3" | 19" | 0.625" | Long shoe trailer applications |
| 4515E | 4.5" | 15" | 0.500" | Extended service, highway use |
Types of Commercial Brake Shoes
Standard Brake Shoes
4515Q
Heavy Duty Brake Shoes
4707Q
Extra Heavy Duty
4709Q
Trailer Brake Shoes
4311Q
Troubleshooting Common Issues
Can't Find Part Number
- Clean the brake shoe with brake cleaner
- Check multiple locations on the shoe
- Look for color-coded edges or markings
- Compare with known working brake shoe
Multiple Part Numbers
- Use the primary/main part number
- Cross-reference all numbers found
- Consult manufacturer's catalog
- Contact parts specialist for verification
Aftermarket vs OEM
- OEM numbers provide exact match
- Aftermarket may have multiple equivalents
- Check material specifications
- Verify mounting hole patterns match
Important Safety Notice
Brake system components are critical safety items. Always have brake work performed by certified technicians. Improper installation or incorrect parts can result in brake failure and serious accidents.
Need Help Identifying Your Brake Shoes?
Our certified brake specialists can help you identify the correct brake shoes and provide professional installation service at both Sidney and Brookville locations.