Twin Y™
The Mack Twin Y™ air suspension is a lightweight, low-maintenance suspension for high-demand jobs. Its innovative Y-shaped design delivers unmatched comfort, handling and fuel efficiency for a smoother and more stable drive.
400 LB. WEIGHT SAVINGS
ENGINE TORQUE CAPACITY UP TO 2,050 LB.-FT.
25% LONGER TIRE LIFE
LOW TO NO MAINTENANCE
20,000 TO 40,000 LBS. CAPACITY
High-Strength Steel Y-shaped Blades
Strong and light
The Twin Y ’s revolutionary design creates a weight savings of more than 400 lbs. versus other suspensions, and an engine torque capacity up to 2,050 lb.-ft.
![](./media_1fa5b27456e0b5c462a6e4fc6ba97cb8dd06f6279.jpeg?width=750&format=jpeg&optimize=medium)
Air Springs
Best-in-class ride and handling
The vertical load rides 100% on the air springs, while the design reduces axle torque windup and allows the tires to maintain contact with the pavement during braking. Reduced wheel hop also improves traction.
![](./media_14dbb38c6c2985893968def6d7e9721da4ce0ef7e.jpeg?width=750&format=jpeg&optimize=medium)
![](./media_1046a5d47e9d5832a5a07fc21a5700dd9dc326f32.jpeg?width=750&format=jpeg&optimize=medium)
Complete Integration
Available on single and tandem axle Mack Pinnacle™ models, Twin Y™ is fully integrated with Mack’s MP® engines, transmissions and axles for increased efficiency.
![](./media_1d2fbc040c8c4b08152c261edfd245ab871fe4e36.jpeg?width=750&format=jpeg&optimize=medium)
Uptime by Design
With lubrication- and maintenance-free rubber bushings, axle seats that never need re-torqueing, an easier axle alignment and less driveline vibration for extended component life, the Twin Y™ air suspension requires little maintenance.
![](./media_13be6b6ae20844894d3e104ecbd24285c5a1dca52.jpeg?width=750&format=jpeg&optimize=medium)
Lower Cost of Ownership
Twin Y™ can extend tire life by up to 25% and with a weight-savings of 400 lbs. versus other suspensions. That means less wear and tear on your vehicle and your wallet.
Suspension & Performance Specs
Twin Y™ is available on the Mack Pinnacle™ Axle Back and Axle Forward models and features Mack S38 and S40 series axles with C125/126, C150/151 and 200 Series axle carriers so you can tailor performance to fit your applications.
AXLE CONFIGURATIONS |
GAWR |
CAPACITY (GCW) |
4x2 | 20,000 lbs. | 40,000kg./105,000 lbs. |
6x4 | 38,000 lbs. | 73,000kg./160,000 lbs. |
6x4 | 40,000 lbs. | 73,000kg./160,000 lbs. |
Single Axle
Tandem Axle
Tehnical Overview
CAPACITY (LBS.)
20,000
AXLES
Mack RA23R
MAXIMUM GCWR (LBS.)
105,000 (with CRD203)
SITE TRAVEL RATINGS (LBS.)
25,000
MAXIMUM ENGINE TORQUE
2,050 lb.-ft
WEIGHT = COMPLETE SUSPENSION (LBS.)
322
Tehnical Overview
CAPACITY (LBS.)
40,000
AXLES
Mack S38R, S40
MAXIMUM GCWR (LBS.)
160,000
SITE TRAVEL RATINGS (LBS.)
50,000
MAXIMUM ENGINE TORQUE
22,050 lb.-ft
WEIGHT = COMPLETE SUSPENSION (LBS.)
644