Air Brake Chambers — Type 20, 24 & 30/30 From $29

Service and spring brake chambers for air brake systems on Class 6-8 trucks and trailers. Type 20, 24, and 30 service chambers. Type 30/30 spring brake chambers with long stroke and standard stroke options. Available in 2-pack and 4-pack packaging with clevis included.

Have a parts list? Paste it into Quick Order — our part numbers or competitor numbers, any format.

Quick order Wholesale & bulk orders

Showing all 3 results

In Stock: 67
Cross Ref: Bendix 165255, Haldex GC3030, MGM 3430051, Meritor 3030TN2-HNTRX-C, Dayton 3030C, Automann 179.SB3030S, Bendix NT3030STD120, Freightliner 3030TS, Mack 19QE441RP1, World American WA3030T, Bendix 802547, Bendix K049898, Haldex GC3030P40, T3030DD
GT-30/30 GBK Type 30/30 Piggyback Spring Brake Chamber, 2.5″ Regular Stroke with Threaded Push Rod and Clevis Kit, Gold-Finish for Heavy Duty Semi Trucks and Trailers
Rated 5.00 out of 5
$53.00 Add to cart
In Stock: 110
Cross Ref: Bendix NT3030ELS-WC, Haldex GC3030L, Automann 179.SB3030SL, MGM 3230951, World American WA3030TL, T30/30DD-L, GBCT3030LS
GT-30/30L GBK Brake Chamber 3030 Long Stroke with clevis, gold, sealed bottom, 3″ stroke, long PUSH ROD 13″
Rated 5.00 out of 5
$55.00 Add to cart
In Stock: 72
Cross Ref: Bendix 5008636, Haldex SC24L, Meritor 24SCN2, MGM 1427001
PAT-24 GBK Type 24 Service Brake Chamber, 2.5″ Long Stroke, with Clevis
$24.00 Add to cart

How to Choose

Drive and trailer axles typically run Type 30/30 spring brakes; steer axles run Type 20 or 24 service chambers.
Long stroke ("L") gives extra usable stroke as linings wear — if the old unit was long-stroke, replace long-stroke.
Every chamber here lists the Bendix, Haldex, MGM, Meritor and Automann numbers it replaces, right on the product page.

Need more help? Air brake chamber size chart & types · Air brake chamber cross-reference guide · Replacement & install checklist

Quick Answers

What size brake chamber does my semi truck need?

Match the type and stroke stamped on the old chamber's nameplate — chambers are standardized, so a Type 30/30 fits a Freightliner the same as a Peterbilt or a trailer axle. Two air ports = spring brake, one port = service chamber.

What does Type 30/30 mean?

Two sections of 30 square inches each: a service diaphragm for pedal braking plus a spring section for parking and emergency. It's the standard spring brake on drive and trailer axles.

Brake Chambers

GT-30/30 GBK Type 30/30 Piggyback Spring Brake Chamber, 2.5″ Regular Stroke with Threaded Push Rod and Clevis Kit, Gold-Finish for Heavy Duty Semi Trucks and Trailers

GT-30/30L GBK Brake Chamber 3030 Long Stroke with clevis, gold, sealed bottom, 3″ stroke, long PUSH ROD 13″

PAT-24 GBK Type 24 Service Brake Chamber, 2.5″ Long Stroke, with Clevis

How to Choose

Quick Answers

What size brake chamber does my semi truck need?

What does Type 30/30 mean?