Design of 245/70R17.5 Tubeless Truck and Bus Radial Tire
The design of 245/70R17.5 tubeless truck and bus radial tire was introduced.In the structural design,the following parameters were taken:overall diameter 789 mm,cross-section width 252 mm,width of running surface 210 mm,arc height of running surface 6.5 mm,bead diameter at rim seat 443.5 mm,bead width at rim seat 203 mm,maximum width position of cross-section(H1/H2)1.008 7,adopting mixed pattern design for tread,pattern depth 15mm,block/total ratio 69％,and number of pattern pitches 49.In the construction design,the following parameters were taken:adopting complex structure of tread compound and small-wing compound for tread,4+3 X0.33ST steel cord for 1# and 2#belt,5X0.30HI steel cord for 3# belt,3X7X0.20HE for 0° belt,3X0.24/9X0.225CCST steel cord for carcass,using one-stage building machine to build tires and dual-model vulcanizing press to cure tires.The finished tire performance test results showed that the inflated peripheral dimension,strength,durability and high-speed performance all met the corresponding design and national standards.
tubeless truck and bus radial tirestructural designconstruction designfinished tire performance
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