Reyco — 21B
Description
This 4-spring trailer suspension for heavy-duty applications including tankers, lowbeds, rear/belly/side-dumps, flatdecks and platforms. Polyurethane equalizer bushings (and kits) provide chemical resistance and better wear/abrasion resistance than rubber. This results in extended bushing life.
Tech Tips and Additional Resources
ATRO offers a full complement of equalizer bushings, bushing kits, torque rods and torque rod bushings:
- EQ83-35300 cast equalizer for 49” axle spacing with cast hangers that includes ATRO’s complete shaft and poly bushing assembly, SK83-31000.
- EQ83-11000 – poly equalizer bushing (requires 2 per equalizer)
- SK83-31000 – poly equalizer bushing (EQ83-11000) kitted with attaching hardware and shaft (1 per equalizer)
- TH83-37997 – poly torque rod bushings (PL1116) kitted with attaching hardware (2 per complete torque rod)
- PL1116 – 2-piece poly torque rod bushing (requires 4 per complete torque rod)
Torque specs: (unless specified by OE for specific suspension model)
- Torque rod bolts (1") should be tightened to 140-160 ft/lb of torque. (Initial torque value may drop as bushings settle in. Not necessary to re-torque after proper bushing clamp is achieved.)
- Equalizer bolts (1") should be torqued to 400-450 ft/lb
Wear Items
- Equalizer bushings and pins
- Torque rod bushings and bolts
Key Parts
Details

Reyco 21B
Suspension details showing hanger, equalizer, and torque rod.