Frame 4" x 8" structural tubing | Gangs & Bearings 8" x 8" gang bar, 4" x 8" gang standard structural tubing welded to gang bar, 2 ¼" square gang bolt w/ self aligning triple sealed bearings in trunnion mount housing, w/ additional external seals. Optional TRB bearings available | Blades & Scrapers 32" x 9.5mm notched plain blades w/ 13" spacing and heavy duty hi-tensile steel scrapers | Axles & Hydraulics Independent axles w/ twin 5" x 12" welded hydraulic cylinders w/ 2 ¼" rods with depth stops and hoses. Tongue constructed of 4" x 8" structural tubing w/ eye type hydraulic leveling | Wheels & Tires Dual wheels w/ 8 bolt heavy duty hub & spindle assembly, w/ 12L x 15" 8-ply tires