Which Chamber Your International Takes
Nearly every on-highway International — LT, LoneStar, HV, HX and ProStar — runs a standard 30/30 clamp-ring spring brake chamber on the drive and, where equipped, steer/tag axles. The three variants cover almost all of them: the T30/30 Long Stroke for extended-stroke slack adjusters, the Short Stroke 30/30 for standard-stroke setups, and the Double Diaphragm for the applications that call for it.
The chamber itself isn't International-specific — it's a DOT 121 foundation-brake part shared across makes — so what matters is the stroke type and mounting, not the truck badge. If you're not sure which stroke your axle runs, the number stamped on the chamber you're pulling off tells us, or send the VIN and we'll pull it.
Don't Guess on a Brake Part
Air brake chambers are a safety item, so we confirm fitment before it ships — by the part number on your old can or by your International's VIN, never a guess. Long-stroke and short-stroke chambers look similar but are not interchangeable; putting the wrong stroke on can leave you short of push-rod travel and out of adjustment.
Buying for a fleet of International trucks? Chambers move in volume, so we stock 2-, 4- and 10-packs at a lower per-unit price — keep a couple on the shelf and you're never waiting on a parked truck.
Frequently asked questions
Do these air brake chambers fit my International LT?
Yes — they're universal-fit 30/30 clamp-ring chambers that fit International LT and the rest of the International lineup running standard air brakes. Confirm the stroke (long vs short) by the number on your old chamber or your VIN and we'll match it exactly.
Long stroke or short stroke — which do I need?
Check the number stamped on the chamber you're removing, or measure the push-rod travel. Long-stroke chambers give more travel for extended-stroke slack adjusters; short-stroke suits standard setups. Send us the VIN or the old part number and we'll confirm before it ships.
Are they DOT compliant?
Yes. These are DOT 121-compliant spring brake chambers for emergency and parking brake service, built as direct aftermarket replacements — with a 6+ month warranty and same-day shipping from Tacoma, WA.
Not sure which chamber you need?
Run your VIN and we’ll match the chamber to your exact truck or trailer, or call the counter — a person who knows air brakes confirms the stroke by the number on your old can before the order ships. No wrong-box returns.