Heavy Duty - Long Stroke vs Standard Stroke Brake Chamber - YouTube
Bendix K129605 Type 3030 Spring Brake, 2.5" Stroke, 11.10" Push Rod with Welded Clevis: AnythingTruck.com, Truck & Trailer Parts and Accessories Warehouse
PTP 72A3030LS 3030 Long Stroke Spring Brake with Threaded Push Rod, 3" Stroke: AnythingTruck.com, Truck & Trailer Parts and Accessories Warehouse
OTR-2430 COMBINATION BRAKE, LONG STROKE-OTR2430SB-LS
TSEHD3030C | Brake Chamber, T30/30, Stroke: 2-1/2 in, Push Rod: 7-7/8 in | Traction.com
AIR BRAKE CHAMBER 30/30 - SEALED - 3" LONG STROKE (SQUARE CAST AIR PORT BOSSES) 842234135727 | eBay