XB Frame Rail Configurations

To engineer vehicles for top performance and meet the unique needs of all of our bus-builder partners, the XB Chassis is available in three configurations. Each is constructed with durable, heavy-duty steel frame rails to reduce flex and bowing, minimize coach stress and keep driver and passengers comfortable.

XBS - Straight Rail

  • Straight Frame Rail with lowered rear section and liner
  • Allows for flat floor throughout the bus
  • Single frame rail connects front and rear suspensions
  • .3125" x 2.81" x 9.125"
  • 50,000 ksi formed steel

XBR & XBP - Raised Rail

  • Raised Frame Rail with lowered rear section and liner
  • Allows for a flat floor throughout the bus and a higher basement height for increased storage space
  • Standard tag axle (XBP)
  • .25" x 2.75" x 9"
  • 50,000 psi steel

XB Wheel Base

All Configurations

  • Wheel Base Range: 160" – 276"
  • Any length wheelbase within range
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