Truck, Bus and Radial tyre (TBR)
Junma Group is a leading provider of high-quality steel cords for radial tyres, designed specifically for passenger cars, freight vehicles, and other types of radial tyres. Our TBR (Truck and Bus Radial) steel cords are engineered to deliver superior performance and durability, ensuring that vehicles can handle the rigors of long-distance travel and heavy loads.
Our TBR steel cords are available in different structural types, including normal, OC, HE, and HI. They are also classified by tensile strength into NT, HT, ST, and UT. These steel cords are meticulously crafted to meet the diverse needs of our customers, offering benefits such as extended lifespan, low rolling resistance, reduced fuel consumption, high load-bearing capacity, and enhanced damping performance.
Choose Junma Group’s TBR steel cords for reliable, long-lasting tyres that offer exceptional performance and efficiency, making them the ideal choice for both commercial and personal transportation.
| Type | Construction | Cord diameter (±5%, mm ) | Lay Length (±5%, mm) | Lay direction | Min. breaking strength （N） | Linear Density （±5%, g/m） |
| (TBR) | 3+9+15*0.175+0.15 NT | 1.34 | 5/10/16/3.5 | SSZS | 1720 | 5.42 |
| 3+9+15*0.22+0.15 NT | 1.62 | 6.3/12.5/18/3.5 | SSZS | 2700 | 8.5 | |
| 3+9+15*0.225+0.15 HT | 1.63 | 6.3/12.5/18/5 | ZZZS | 3100 | 8.8 | |
| 3+9+15*0.225 HT | 1.39 | 6.3/12.5/18 | ZZZ | 3120 | 8.63 | |
| 3+9+15*0.225 ST | 1.39 | 6.3/12.5/18 | ZZZ | 3485 | 8.63 | |
| 3+9+15*0.245 HT | 1.51 | 6.5/12.5/18 | ZZZ | 3730 | 10.26 | |
| 0.20+6+11*0.18 HT | 0.92 | 6/12 | SS | 1450 | 3.8 | |
| 0.22+6+11*0.20 HT | 1.02 | 7/14 | ZZ | 1700 | 4.57 | |
| 0.25+6*0.22+12*0.20 HT | 1.09 | 6.3/16.0 | ZZ | 1725 | 5.26 | |
| 0.22+6+12*0.20 HT | 1.02 | 6.3/12.5 | ZZ | 1770 | 4.86 | |
| 0.22+6+12*0.20 ST | 1.02 | 6.3/12.5 | ZZ | 2010 | 4.86 | |
| 0.25+6+12*0.225 HT | 1.13 | 8/16 | ZZ | 2225 | 6.05 | |
| 0.16+5*0.205+9*0.235 ST | 1.03 | 15/15 | ZZ | 2020 | 4.6 | |
| 0.20+18*0.175 HT | 0.9 | 10 | Z | 1440 | 3.66 | |
| 0.20+18*0.175 ST | 0.9 | 10 | Z | 1520 | 3.66 | |
| 0.22+18*0.20 CC HT | 1.02 | 12.5 | Z | 1805 | 4.84 | |
| 0.22+18*0.20 CC ST | 1.02 | 12.5 | Z | 2010 | 4.84 | |
| 0.25+18*0.22 CC HT | 1.13 | 16 | Z | 2170 | 5.85 | |
| 3*0.20/9*0.175 CC HT | 0.75 | 10/10 | SS | 950 | 2.49 | |
| 3*0.20/9*0.175 CC ST | 0.75 | 10/10 | SS | 1050 | 2.49 | |
| 3*0.22/9*0.20 CC HT | 0.87 | 12.5 | SS | 1220 | 3.17 | |
| 3*0.22/9*0.20 CC ST | 0.87 | 12.5 | SS | 1320 | 3.17 | |
| 3*0.22/9*0.20 CC UT | 0.87 | 12.5 | SS | 1500 | 3.38 | |
| 3*0.24/9*0.225 CC HT | 0.94 | 14/14 | SS | 1445 | 3.94 | |
| 3*0.24/9*0.225+0.15 HT | 1.17 | 12.5/12.5/5 | SSZ | 1451 | 4.09 | |
| 3*0.24/9*0.225 CC ST | 0.94 | 14/14 | SS | 1670 | 3.94 | |
| 3+9*0.22+0.15 NT | 1.17 | 6.3/12.5/3.5 | SSZ | 1210 | 3.85 | |
| 3+9*0.22+0.15 HT | 1.17 | 6.3/12.5/3.5 | SSZ | 1410 | 3.85 | |
| 2/7*0.175 ST | 0.7 | 10 | S | 810 | 1.72 | |
| 2+7*0.22 HT | 0.83 | 6.3/12.5 | SS | 1010 | 2.74 | |
| 2+7*0.25 HT | 0.94 | 7/14 | SS | 1285 | 3.53 | |
| 2+7*0.25 ST | 0.95 | 7/14 | SS | 1430 | 3.53 | |
| 2+7*0.28 HT | 1.06 | 8/16 | SS | 1530 | 4.45 | |
| 2+7*0.28 ST | 1.06 | 8/16 | SS | 1765 | 4.45 | |
| 2+7*0.30 HT | 1.16 | 8/16 | SS | 1770 | 5.08 | |
| 2+7*0.30 ST | 1.16 | 8/16 | SS | 2005 | 5.08 | |
| 2+7*0.34 HT | 1.34 | 8/18 | SS | 2235 | 6.53 | |
| 3+8*0.20 HT | 0.82 | 6.3/12.5 | SS | 1010 | 2.78 | |
| 3/8*0.20 ST | 0.82 | 10/10 | SS | 1127 | 2.78 | |
| 3+8*0.21 HT | 0.85 | 7/14 | SS | 1150 | 3.05 | |
| 3+8*0.21 ST | 0.85 | 7/14 | SS | 1285 | 3.05 | |
| 3+8*0.22 HT | 0.91 | 6/12 | SS | 1240 | 3.33 | |
| 3+8*0.23 HT | 0.95 | 8/16 | SS | 1350 | 3.62 | |
| 3+8*0.23 ST | 0.95 | 8/16 | SS | 1600 | 3.62 | |
| 3+8*0.33 HT | 1.37 | 10/18 | SS | 2650 | 7.53 | |
| 3+8*0.33 ST | 1.37 | 10/20(10/18) | SS | 2940 | 7.52 | |
| 3+8*0.35 HT | 1.45 | 9/18 | SS | 2810 | 8.51 | |
| 3/8*0.35 CC HT | 1.45 | 18 | S | 2975 | 8.45 | |
| 3+2*0.30 HT | 0.9 | 16 | S | 1010 | 2.79 | |
| 3+2*0.30 ST | 0.9 | 16 | S | 1115 | 2.79 | |
| 3+2*0.30 UT | 0.9 | 16 | S | 1210 | 2.79 | |
| 3+2*0.35 HT | 1.07 | 18 | S | 1305 | 3.82 | |
| 3+2*0.35 ST | 1.07 | 18 | S | 1470 | 3.82 | |
| 3+3*0.35 HT | 1.09 | 18 | S | 1565 | 4.53 | |
| 3+3*0.35 ST | 1.09 | 18 | S | 1765 | 4.53 | |
| 4+3*0.33 BX ST | 1.1 | 18 | S | 1850 | 4.74 | |
| 4+3*0.35 BX HT | 1.19 | 18 | S | 1825 | 5.31 | |
| 4+3*0.35 BX ST | 1.19 | 18 | S | 2050 | 5.31 | |
| 1+5*0.40HT | 1.2 | 20 | S | 1960 | 5.99 | |
| 3*2*0.35 HE | 1.42 | 3.9/10 | SS | 1100 | 4.89 | |
| 3*3*0.22HE | 1.00 | 3.15/6.30 | SS | 775 | 2.86 | |
| 3*4*0.22 HE | 1.18 | 3.15/6.3 | SS | 940 | 3.96 | |
| 3*6*0.22 HE | 1.5 | 3.5/6.3 | SS | 1410 | 6.05 | |
| 3*7*0.175 HE | 1.2 | 3.9/6.3 | SS | 1150 | 4.45 | |
| 3*7*0.20 HE | 1.39 | 3.9/6.3 | SS | 1360 | 5.85 | |
| 3*7*0.22 HE | 1.53 | 4.5/8 | SS | 1720 | 6.95 | |
| 4*2*0.25 HE | 1.12 | 3.5/6 | SS | 870 | 3.2 | |
| 4*2*0.34 HE | 1.5 | 3/7.5 | SS | 1330 | 6.3 | |
| 4*2*0.35 HE | 1.55 | 3.5/7.5 | SS | 1400 | 6.68 | |
| 4*4*0.20 HE | 1.24 | 4.0/7.0 | SS | 1270 | 4.39 | |
| 4*4*0.225 HE | 1.36 | 3.5/5 | SS | 1150 | 5.41 | |
| 5*0.30 HI | 1.03 | 12.5 | S | 875 | 2.82 | |
| 5*0.35 HI | 1.19 | 14 | S | 1130 | 3.89 | |
| 5*0.38 HI | 1.24 | 14 | S | 1215 | 4.53 |
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