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Peterbilt · Suspension & Steering
75-129
In stock · ships from Knoxville
This is a rear parabolic leaf spring designed for Peterbilt trucks with Air Trac or Air-Leaf air suspension.
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Verified fitment for 1 applications
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Peterbilt
Peterbilt
Verified for Peterbilt Air-Leaf rear suspension systems. Exact model fitment should be confirmed with your VIN, but this spring is widely applicable to 1989–2000 Peterbilt trucks equipped with the manufacturer's Air Trac/Air-Leaf air rear suspension.
Part data verified against 5 catalog sources
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It uses a two-leaf, full-taper design to support the vehicle's load while providing a smoother ride compared to traditional multi-leaf springs. You typically replace these springs in pairs when the originals sag, crack, or break, which can cause uneven ride height or affect suspension performance. This spring handles 19,000 to 20,000 lbs per axle and is a direct OEM replacement for several Peterbilt part numbers.
Part Number: 75-129
DRIVE SPRING PETE
Vendor: Martin's Peterbilt
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
