VSI Form Selection

In order to fit your vehicle, we will need specific information based on measurements you must provide on our VSI form. If you know the VSI form you need, you may download it here.

To determine your VSI form, scroll down the alphabetical list to find the Make of your vehicle. Then determine the VSI form by matching your Model, Suspension Type, Axle and Brakes. If you cannot locate your specific model, we can still provide a unit to match your needs. Please contact us for more information.

Chassis Make Model Suspension Type Single or Tandem Axle Brake Style Unv. Bkt. Custm Brkt Aux. Air Req. Trays Req. New U-Bolts Req. Other Notes or Information VSI
AMERICAN LAFRANCE All Models Spring Single Axle All Models Yes Yes No No VSI-001
AMERICAN LAFRANCE All Models Air Ride Single Axle All Models Yes Yes No No VSI-001
AMERICAN LAFRANCE All Models Other Single Axle Air Brakes See Suspension types See Suspension types No No Refer to Suspension Section
AMERICAN LAFRANCE All Models Other Tandem Axle Air Brakes No No No Refer to Suspension Section
AMTRAN SCHOOL BUS Genisis Spring Single Axle Air Brakes Yes Yes No No VSI-001
AMTRAN SCHOOL BUS Genisis Air Ride Single Axle Air Brakes Yes Yes No No VSI-001
AMTRAN SCHOOL BUS Genisis Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
AMTRAN SCHOOL BUS Genisis Air Ride Single Axle Hyd./Disc Brakes Yes Yes No No VSI-001
BLUEBIRD All Models Spring Single Axle Air Brakes Yes Yes No No VSI-001
BLUEBIRD All Models Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
BLUEBIRD All Models Air Ride Single Axle Air Brakes Yes Yes No Yes VSI-001
BLUEBIRD All Models Air Ride Single Axle Hyd./Disc Brakes Yes Yes No No VSI-001
CARPENTER SCHOOL BUS All Models Spring Single Axle Air Brakes Yes Yes No VSI-001
CARPENTER SCHOOL BUS All Models Spring Single Axle Hyd./Disc Brakes Yes Yes Yes VSI-001
CHEVROLET Kodiak Spring Single Axle Air Brakes Yes Yes No No VSI-001
CHEVROLET C4500/5500 w/o Sway Bar Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
CHEVROLET C4500/5500 Air Ride Single Axle Hyd./Disc Brakes No Yes No Yes Refer to Suspension Section VSI-001
CHEVROLET C4500/5500 w/ Sway Bar Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes New Sway bar VSI-001
CHEVROLET C6500 Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
CHEVROLET C7500 Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
CHEVROLET C7500 Spring Single Axle Air Brakes Yes Yes No No VSI-001
DODGE Sprinter-2500 (SRW) Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
DODGE Sprinter-3500 (DRW) Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
DODGE 3500 Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
DODGE 4500 Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
DODGE 4500 Air Ride Single Axle Hyd./Disc Brakes No Yes Yes Yes Refer to Suspension Section VSI-001
DODGE 5500 Spring Single Axle Hyd./Disc Brakes No Yes No Yes VSI-001
DODGE 5500 Air Ride Single Axle Hyd./Disc Brakes No Yes No Yes Refer to Suspension Section VSI-001
E-ONE (EMERGENCY ONE) All Models Spring Single Axle Air Brakes Yes No No VSI-001
E-ONE (EMERGENCY ONE) All Models Reyco or Hend. Air Ride Single Axle Air Brakes Yes No No VSI-001
E-ONE (EMERGENCY ONE) All Models Other Single Axle Air Brakes See Suspension types See Suspension types Refer to Suspension Section
E-ONE (EMERGENCY ONE) All Models Other Tandem Axle Air Brakes Yes Refer to Suspension Section
FORD E350- Single or Dual Tires Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-002
FORD E350 SD- Single or Dual Tires Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-002
FORD E450- Dual Tires (ESuperduty) Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes IPD Bar VSI-002
FORD E550 Dual Rear Wheels Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-002
FORD F350- Single or Dual Tires Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
FORD F350- Single or Dual Tires Air Ride Single Axle Hyd./Disc Brakes No Yes No Yes Refer to Suspension Section VSI-001
FORD F450 Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
FORD F450 Air Ride Single Axle Hyd./Disc Brakes No Yes Yes Yes Refer to Suspension Section VSI-001
FORD F550 Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
FORD F550 Air Ride Single Axle Hyd./Disc Brakes No Yes Yes Yes Refer to Suspension Section VSI-001
FORD F-650 Spring Single Axle Hyd./Disc Brakes Yes Yes Yes Yes VSI-001
FORD F-650 Air Ride Single Axle Hyd./Disc Brakes No No Yes VSI-001
FORD F-750 Spring Single Axle Air Brakes Yes Yes No No VSI-001
FORD F-750 Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
FORD F-750 Spring Air Ride Air Brakes Yes Yes No Yes VSI-001
FORD F-750 Spring Air Ride Hyd./Disc Brakes Yes Yes Yes No VSI-001
FORD L8000 Spring Single Axle Air Brakes Yes No No VSI-001
FORD LN8000 Spring Single Axle Air Brakes Yes No No VSI-001
FORD F800 Spring Single Axle Air Brakes Yes No No VSI-001
FORD F8000 Spring Single Axle Air Brakes Yes No No VSI-001
FORD B-700 Spring Single Axle Air Brakes No No VSI-001
FORD B-700 Spring Single Axle Hyd./Disc Brakes Yes Yes No VSI-001
FREIGHTLINER Other Airliner Air Ride Single Axle Air Brakes No Yes No Yes Yes VSI-001
FREIGHTLINER Columbia, Classic, Century, Coronado (all Semi’s) Airliner Air Ride Tandem-Front Axle Air Brakes No Yes No Yes Yes VSI-001
FREIGHTLINER Columbia, Classic, Century, Coronado (all Semi’s) Airliner Air Ride Tandem-Rear Axle Air Brakes No Yes No No Yes VSI-001
FREIGHTLINER FL50, FL60 Spring Single Axle Hyd./Disc Brakes Yes Yes No No VSI-001
FREIGHTLINER FL50, FL60 Air Ride Single Axle Hyd./Disc Brakes No Yes No Yes VSI-001
FREIGHTLINER FL50, FL60 Air Ride Single Axle Air Brakes No Yes No Yes Can’t Fit
FREIGHTLINER FL70, FL80, FL112 Spring Single Axle Air Brakes Yes Yes No No VSI-001
FREIGHTLINER FL70, FL80, FL112 Reyco or Hend. Air Ride Single Axle Air Brakes Yes Yes No Yes VSI-001
FREIGHTLINER FL70, FL80, FL112 Airliner Air Ride Single Axle Air Brakes No Yes No Yes Yes VSI-001
FREIGHTLINER FL70, FL80, FL112 Spring Tandem Axle Air Brakes Yes Yes No No VSI-001
FREIGHTLINER FL70, FL80, FL112 Airliner Air Ride Tandem-Front Axle Air Brakes Yes Yes No Yes Yes VSI-001
FREIGHTLINER FL70, FL80, FL112 Airliner Air Ride Tandem-Rear Axle Air Brakes Yes Yes No No Yes VSI-001
FREIGHTLINER FL70, FL80, FL112 Other Tandem Axle Air Brakes Yes Yes Refer to Suspension Section
FREIGHTLINER M2 – LOPRO Spring Single Axle Hyd./Disc Brakes Yes Yes No No VSI-001
FREIGHTLINER M2 – LOPRO Air Ride Single Axle Hyd./Disc Brakes No Yes No Yes VSI-001
FREIGHTLINER M2 – LOPRO Air Ride Single Axle Air Brakes No Yes No Yes Can’t Fit
FREIGHTLINER M2 Spring Single Axle Air Brakes Yes Yes No No VSI-001
FREIGHTLINER M2 Reyco or Hend. Air Ride Single Axle Air Brakes Yes Yes No No VSI-001
FREIGHTLINER M2 Airliner Air Ride Single Axle Air Brakes No Yes No Yes Yes VSI-001
FREIGHTLINER M2 Spring Tandem Axle Air Brakes Yes Yes No No VSI-001
FREIGHTLINER M2 Airliner Air Ride Tandem-Front Axle Air Brakes Yes Yes No Yes Yes VSI-001
FREIGHTLINER M2 Airliner Air Ride Tandem-Rear Axle Air Brakes Yes Yes No No Yes VSI-001
FREIGHTLINER M2 Other Tandem Axle Air Brakes Yes Yes Refer to Suspension Section
FREIGHTLINER Sprinter-2500 (SRW) Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
FREIGHTLINER Sprinter-3500 (DRW) Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
FREIGHTLINER Vocational – TufTrac TufTrac Tandem Axle Air Brakes No Yes No No VSI-006
FREIGHTLINER All others Spring Single Axle Air Brakes Yes Yes No No VSI-001
FREIGHTLINER All others Other Tandem Axle Air Brakes No Refer to Suspension Section
GILLIG 102″ Axle Air Ride Single Axle Air Brakes No Yes No Yes None
GILLIG 96″ Axle Air Ride Single Axle Air Brakes No Yes No Yes None
GMC Savanna-School bus chassis, dual wheels Spring Single Axle Hyd./Disc Brakes Yes Yes Muffler must be mounted in the rear VSI-001
GMC Topkick Spring Single Axle Air Brakes Yes Yes No No VSI-001
GMC 2500 HD Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes No VSI-001 & VSI-002
GMC 3500 Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes No VSI-001 & VSI-002
GMC C4500/5500 w/o Sway Bar Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes VSI-001
GMC C4500/5500 Air Ride Single Axle Hyd./Disc Brakes No Yes No Yes Refer to Suspension Section VSI-001
GMC C4500/5500 w/ Sway Bar Spring Single Axle Hyd./Disc Brakes No Yes Yes Yes New Sway bar VSI-001
GMC C6500 Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
GMC C7500 Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
GMC C7500 Spring Single Axle Air Brakes Yes Yes No No VSI-001
GMC All other models Spring Yes VSI-001
HME Standard 4X2 Spring Single Axle Air Brakes Yes Yes No No VSI-001
HME 4×4 with power divider Spring Single Axle Air Brakes Yes Yes No Yes VSI-001
HME All Models Other Single Axle Air Brakes See Suspension types See Suspension types Refer to Suspension Section
HME All Models Other Tandem Axle Air Brakes Yes Refer to Suspension Section
INTERNATIONAL BUS 3700, 3800, 3900 Spring Single Axle Hyd./Disc Brakes Yes VSI-001
INTERNATIONAL BUS 3700, 3800, 3900 Spring Single Axle Air Brakes No VSI-001
INTERNATIONAL BUS 3700, 3800, 3900 Air Ride Single Axle Hyd./Disc Brakes Yes VSI-001
INTERNATIONAL BUS 3700, 3800, 3900 Air Ride Single Axle Air Brakes No VSI-001
INTERNATIONAL BUS BE, CE, FE, RE Series Spring Single Axle Hyd./Disc Brakes Yes VSI-001
INTERNATIONAL BUS BE, CE, FE, RE Series Spring Single Axle Air Brakes No VSI-001
INTERNATIONAL BUS BE, CE, FE, RE Series – IROS Air Ride IROS Air Ride Single Axle Hyd./Disc Brakes Yes VSI-001
INTERNATIONAL BUS BE, CE, FE, RE Series – IROS Air Ride IROS Air Ride Single Axle Air Brakes No VSI-001
INTERNATIONAL BUS Gensis Spring Single Axle Hyd./Disc Brakes Yes No VSI-001
INTERNATIONAL BUS Gensis Spring Single Axle Air Brakes No No VSI-001
INTERNATIONAL BUS Gensis Air Ride Single Axle Hyd./Disc Brakes Yes No VSI-001
INTERNATIONAL BUS Gensis Air Ride Single Axle Air Brakes No No VSI-001
INTERNATIONAL TRUCKS CityStar CF500, CF600 Spring Single Axle Hyd./Disc Brakes No Yes Yes VSI-001
INTERNATIONAL TRUCKS DuraStar 4300-LoPro – Air Brakes Spring Single Axle Air Brakes No No Yes VSI-001
INTERNATIONAL TRUCKS DuraStar 4300-LoPro – Hyd./Disc Brakes Spring Single Axle Hyd./Disc Brakes No Yes Yes VSI-001
INTERNATIONAL TRUCKS DuraStar 4300-LoPro – Air Brakes Air Ride Single Axle Air Brakes No No Yes Can’t fit if has Air Ride & Air Brakes
INTERNATIONAL TRUCKS DuraStar 4300-LoPro – Hyd./Disc Brakes Air Ride Single Axle Hyd./Disc Brakes No No Yes VSI-001
INTERNATIONAL TRUCKS DuraStar 4100, 4300, 4400, 4700, 4900 Spring Single Axle Air Brakes Yes No No VSI-001
INTERNATIONAL TRUCKS DuraStar 4100, 4300, 4400, 4700, 4900 Spring Single Axle Hyd./Disc Brakes Yes Yes No VSI-001
INTERNATIONAL TRUCKS DuraStar 4100, 4300, 4400, 4700, 4900 Air Ride Single Axle Air Brakes Yes No No VSI-001
INTERNATIONAL TRUCKS DuraStar 4100, 4300, 4400, 4700, 4900 Air Ride Single Axle Hyd./Disc Brakes Yes Yes No VSI-001
INTERNATIONAL TRUCKS 4700LP – Air Brakes Spring Single Axle Air Brakes No No Yes VSI-001
INTERNATIONAL TRUCKS 4700LP – Hyd./Disc Brakes Spring Single Axle Hyd./Disc Brakes No Yes No VSI-001
INTERNATIONAL TRUCKS 4700LP – Air Brakes Air Ride Single Axle Air Brakes No Can’t fit if has Air Ride & Air Brakes
INTERNATIONAL TRUCKS 4700LP – Hyd./Disc Brakes Air Ride Single Axle Hyd./Disc Brakes No Yes Yes VSI-001
INTERNATIONAL TRUCKS 4700, 4900 Spring Single Axle Air Brakes No No No VSI-001
INTERNATIONAL TRUCKS 4700, 4900 Spring Single Axle Hyd./Disc Brakes No Yes No VSI-001
INTERNATIONAL TRUCKS 4700, 4900 Air Ride Single Axle Air Brakes No No No VSI-001
INTERNATIONAL TRUCKS 4700, 4900 Air Ride Single Axle Hyd./Disc Brakes No Yes No VSI-001
INTERNATIONAL TRUCKS Paystar – 5500, 5600, 5900 Spring Single Axle Air Brakes No No VSI-001
INTERNATIONAL TRUCKS Paystar – 5500, 5600, 5900 IROS Air Ride Single Axle Air Brakes No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS Paystar – 5500, 5600, 5900 Spring Tandem Axle Air Brakes No No VSI-001
INTERNATIONAL TRUCKS Paystar – 5500, 5600, 5900 IROS Air Ride Tandem Axle Air Brakes No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS Paystar – 5500, 5600, 5900 Other Tandem Axle Air Brakes Refer to Suspension Section
INTERNATIONAL TRUCKS Workstar – 7300, 7400, 7500, 7600, 7700 Spring Single Axle Air Brakes No No VSI-001
INTERNATIONAL TRUCKS Workstar – 7300, 7400, 7500, 7600, 7700 IROS Air Ride Single Axle Air Brakes No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS Workstar – 7300, 7400, 7500, 7600, 7700 Spring Tandem Axle Air Brakes No No VSI-001
INTERNATIONAL TRUCKS Workstar – 7300, 7400, 7500, 7600, 7700 IROS Air Ride Tandem Axle Air Brakes No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS Workstar – 7300, 7400, 7500, 7600, 7700 Other Tandem Axle Air Brakes Refer to Suspension Section
INTERNATIONAL TRUCKS TranStar – 8500, 8600 Spring Single Axle Air Brakes No No VSI-001
INTERNATIONAL TRUCKS TranStar – 8500, 8600 IROS Air Ride Single Axle Air Brakes No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS TranStar – 8500, 8600 Spring Tandem Axle Air Brakes No No VSI-001
INTERNATIONAL TRUCKS TranStar – 8500, 8600 IROS Air Ride Tandem Axle Air Brakes No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS TranStar – 8500, 8600 Other Tandem Axle Air Brakes Refer to Suspension Section
INTERNATIONAL TRUCKS Other Models IROS Air Ride Tandem Axle Air Brakes See Suspension types See Suspension types No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS Other Models Other Tandem Axle Air Brakes See Suspension types See Suspension types Refer to Suspension Section
INTERNATIONAL TRUCKS LoneStar IROS Air Ride Tandem Axle Air Brakes Yes No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS ProStar IROS Air Ride Tandem Axle Air Brakes Yes No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS 9200i, 9400i, 9900i – IROS IROS Air Ride Tandem Axle Air Brakes No No No Needs extra UB Nuts VSI-001
INTERNATIONAL TRUCKS Other Models Spring Single Axle Air Brakes Yes No No VSI-001
INTERNATIONAL TRUCKS Other Models Air Ride Single Axle Air Brakes No No No VSI-001
ISUZU All Models Spring Single Axle Air Brakes Yes VSI-001
ISUZU All Models Spring Single Axle Hyd./Disc Brakes Yes Yes VSI-001
KENWORTH Any Model T-100 Suspension Air Ride Tandem Axle Air Brakes No Yes No Yes VSI-007
KENWORTH Any Model T-200 Airglide Suspension (no tag axles) Air Ride Tandem Axle Air Brakes No Yes No Yes VSI-007
KENWORTH Any Model AG400 Suspension Air Ride Tandem Axle Air Brakes No Yes No Yes VSI-007
KENWORTH Flex Air – AG380 Suspension Air Ride Tandem Axle Air Brakes No Yes No Yes VSI-001
KENWORTH T-300 Spring Single Axle Air Brakes Yes Yes No No VSI-001
KENWORTH Single Axle Trucks Spring Single Axle Air Brakes Yes Yes No No VSI-001
KENWORTH All other suspensions- See Suspension types Air Brakes See Suspension types See Suspension types Refer to Suspension Section
KME Single Axle All Models Spring Single Axle Air Brakes Yes Yes VSI-001
KME All Models Other Single Axle Air Brakes See Suspension types See Suspension types Refer to Suspension Section
KME All Models See Suspension types Tandem Axle Air Brakes See Suspension types See Suspension types Refer to Suspension Section
MACK All Models Spring Tandem Axle Air Brakes Yes Yes VSI-001
MACK All Models Air Ride Tandem Axle Air Brakes Yes Yes VSI-001
MACK All Models Camelback Tandem Axle Air Brakes No Yes VSI-011
MCI MC 9 Call for more info
MCI 102-C3 Call for more info
MCI 102-D4 Call for more info
MCI 102-A3 Call for more info
MCI All Other Models Call for more info
MID BUS See Chassis Manufacturer
MITSUBISHI All Models Spring Single Axle Air Brakes Yes No No VSI-001
MITSUBISHI All Models Spring Single Axle Hyd./Disc Brakes Yes Yes No VSI-001
PETERBILT Spring Suspension Spring Single Axle Air Brakes Yes Yes No No VSI-001
PETERBILT Spring Suspension Spring Tandem Axle Air Brakes Yes Yes No No VSI-001
PETERBILT All Models Air Trac Air Ride Tandem Axle Air Brakes Yes Yes No No VSI-001
PETERBILT All Models Air Leaf Air Ride Tandem Axle Air Brakes Yes Yes No No VSI-001
PETERBILT All Models Low Air Leaf Air Ride Tandem Axle Air Brakes Yes Yes No No VSI-001
PETERBILT All Models Flex Air AG380 Air Ride Tandem Axle Air Brakes No Yes No No VSI-001
PIERCE All Models Spring Single Axle Air Brakes Yes Yes No No VSI-001
PIERCE All Models Other Single Axle Air Brakes See Suspension types See Suspension types No Refer to Suspension Section
PIERCE All Models Other Tandem Axle Air Brakes See Suspension types See Suspension types No Refer to Suspension Section
SETRA 215HD Single Axle Air Brakes No Yes No None
SETRA 315HD Single Axle Air Brakes No Yes No None
SEAGRAVES (FWD) All Models Spring Single Axle Air Brakes Yes Yes No No VSI-001
SEAGRAVES (FWD) All Models Other Single Axle Air Brakes See Suspension types See Suspension types No Refer to Suspension Section
SEAGRAVES (FWD) All Models See Suspension types Tandem Axle Air Brakes See Suspension types See Suspension types No Refer to Suspension Section
SPARTAN All Models Spring Single Axle Air Brakes Yes Yes No No VSI-001
SPARTAN All Models Other Single Axle Air Brakes See Suspension types See Suspension types No Refer to Suspension Section
SPARTAN All Models Other Tandem Axle Air Brakes See Suspension types See Suspension types No Refer to Suspension Section
SUTPHEN All Models Spring Single Axle Air Brakes Yes Yes No No VSI-001
SUTPHEN All Models Other Single Axle Air Brakes See Suspension types See Suspension types No Refer to Suspension Section
SUTPHEN All Models See Suspension types Tandem Axle Air Brakes See Suspension types See Suspension types No Refer to Suspension Section
THOMAS Safe-T-Liner – FS65 – Airliners Suspen. Air Ride Single Axle Hyd./Disc Brakes No Yes No Yes Yes VSI-001
THOMAS Safe-T-Liner – FS65 – Airliners Suspen. Air Ride Single Axle Air Brakes No Yes No Yes Yes VSI-001
THOMAS Safe-T-Liner – C2 Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
THOMAS Safe-T-Liner – C2 Spring Single Axle Air Brakes Yes Yes No No VSI-001
THOMAS Safe-T-Liner – C2 – Airliner Suspen. Air Ride Single Axle Air Brakes Yes Yes No Yes VSI-001
THOMAS Safe-T-Liner – EF Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
THOMAS Safe-T-Liner – EF Spring Single Axle Air Brakes Yes Yes No No VSI-001
THOMAS Safe-T-Liner – EF – Airliner Suspen. Air Ride Single Axle Air Brakes Yes Yes No Yes VSI-001
THOMAS Safe-T-Liner – HDX Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
THOMAS Safe-T-Liner – HDX Spring Single Axle Air Brakes Yes Yes No No VSI-001
THOMAS Safe-T-Liner – HDX – Airliner Suspen. Air Ride Single Axle Air Brakes Yes Yes No Yes VSI-001
THOMAS Minitour – GMC3500 Chassis Spring Single Axle Hyd./Disc Brakes Yes Yes Yes Yes No VSI-001 & VSI-002
THOMAS MyBus – Chevy 3500 Chassis Spring Single Axle Hyd./Disc Brakes Yes Yes Yes Yes No VSI-001 & VSI-002
THOMAS All Other models Spring Single Axle Hyd./Disc Brakes Yes Yes Yes No VSI-001
THOMAS All Other models Spring Single Axle Air Brakes Yes Yes No No VSI-001
THOMAS All Other models – Airliner Suspen. Airliner Air Ride Single Axle Hyd./Disc Brakes Yes Yes No Yes Yes VSI-001
THOMAS All Other models – Airliner Suspen. Airliner Air Ride Single Axle Air Brakes Yes Yes No Yes Yes VSI-001
THOMAS Other Air Ride Suspensions See Suspension types See Suspension types See Suspension types Refer to Suspension Section
UD TRUCKS All models-Air Brakes Spring Single Axle Air Brakes Yes No No VSI-001
UD TRUCKS All models-Hyd./Disc Brakes Spring Single Axle Hyd./Disc Brakes Yes Yes No VSI-001
VOLVO Single Axle Air Ride Single Axle Air Brakes Yes Yes VSI-001
VOLVO Single Axle Spring Single Axle Air Brakes Yes Yes VSI-001
VOLVO Tandem Axle-OTR Tractor Air Ride Tandem Axle Air Brakes Yes Yes Will need new U-Bolts VSI-001
VOLVO T-Ride T-Ride Tandem Axle Air Brakes No Yes VSI-006
VOLVO Tandem Axle-Vocational Other Air Brakes See Suspension types See Suspension types Refer to Suspension Section
WARD SCHOOL BUS All models Spring Single Axle Air Brakes Yes No No VSI-001
WARD SCHOOL BUS All models Spring Single Axle Hyd./Disc Brakes Yes Yes No VSI-001
WESTERN STAR All Models Airliner Air Ride Tandem-Front Axle Air Brakes No Yes No Yes Yes VSI-001
WESTERN STAR All Models Airliner Air Ride Tandem-Rear Axle Air Brakes No Yes No No Yes VSI-001