ProTec™ Independent Front Suspension

Product Availability

North America

Applications

Bus and Coach
Independent Front Suspension

The ProTec Independent Front Suspension (IFS) is based on the field-proven technology of the industry-leading ProTec series of independent suspensions and beam axles. Purpose-built for the most demanding applications and backed by our extensive heritage of delivering innovative on-highway, off-highway and specialty vehicle solutions for more than a century, the ProTec IFS is our answer to the suspension requirements of the motorcoach industry.

 

Features & Benefits

  • Proven independent suspension technology – The ProTec brand has been synonymous with quality and durability for high-mobility vehicles for over 20 years and the new ProTec Independent Front Suspension leverages this expertise in design and performance
  • Built for compatibility – Fully integrated suspension and steering system designed to be a “drop-in” replacement to existing suspensions
  • Application specific tuning – High performance dampers from commercial suppliers with various tuning methods for steering, springs, anti-roll bars and dampers, per application demands
  • Modern steering geometry – Stiff, low compliance suspension and steering pivots improve driver control and stability for safe and confident handling
  • Extensive testing and validation – Simulation and optimization through finite element analysis (FEA) and kinematic analysis including full- and sub-system durability and reliability testing in our test labs
  • Manufacturing excellence – Cast suspension components and precision-fabricated subframe provides durability while enhanced suspension kinematics improves ride and handling
  • Ease of use and service – Maintenance-free suspension pivots
  • Unmatched technical support – All products are backed by OnTrac™ – our award-winning service team – available to assist customers before, during and after the sale

Videos:

  MIS-20E 
Configuration Double wishbone with non-compliant control arm bushings and inverted dual steering box layout 
Gross Axle Weight Rating (GAWR) 20,000 lbs. (9,072 kg) 
Axle System Weight  2,000 lbs. (907 kg) 
Wheel Mount  Hub-piloted 10-stud 11.25" BC (285.75 mm) 
Brakes  EX+™ L 
Springs  Air springs with integrated bump aid 
Shocks  High capacity twin-tube shocks 
Total Vertical Wheel Travel 6.5" (165 mm) 
Minimum Rim Size  20" (508 mm) 
Hub Flange to Flange  96.6" (2,454 mm) 
Track Width  85.6" (2,174 mm) 
Steering Joint Type  Universal 
Max Steering Angle  55° 
Camber  
King Pin Inclination  8.5° 
ABS Hub Compatibility  Standard 
Roll center height in (mm) 9.84 (250)
Ride steer 5°/m understeer
King pin inclination 8.9°
ABS hub compatibility Standard
NOTE: Options may not be available on every configuration. Rating, ratios and main dimensions are subject to Cummins-Meritor Engineering approval. 


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