EK 630SHB Drag Chain EK drag racing chains can rightfully be called the fastest chains in the world. Top Fuel champion Larry McBride set a world record E.T. of 5.80 seconds using the EK 630SHB chain. The EK 530DRZ has achieved a velocity of 344.048 mph on Sam Wheeler’s E-Z-Hook Streamliner at the Bonneville Salt Flats. The EK 530DRZ is also the choice of more top NHRA Pro Stock motorcycle racers than any other chain. All drag race chains are roller chain and do not have o-rings or x-rings. EK 630SHB - The World's First Five-Second Chain This Top Fuel and Funny Bike drive chain is available exclusively through Pingel Enterprise. The EK 630SHB offers a tensile strength of 15,800 lbs. and can be used on bikes with more than 500hp. The chain has a pin diameter of .295, the master plate measures .157. The pins are full diameter the full length of the pin. The pin groove is deeper and has a better quality clip to retain the master link plate. To order, specify number of pins needed. Master link sold separately.   Pitch Width Pin Dia. Pin Length Roller Dia. Plate Thickness Tensile Strength Wear Life Index Weight 100 Links   Connecting Link Chain in.    mm    in.    mm    mm    mm    mm   Inner(mm)   Outer (mm)   lbs.    kN   Basis = 100 lbs.  kg   HP Max Std. Option 530DRZ  5/8   15.875   3/8   9.53    5.64    24.80    10.20    3.20    2.60   11,500    51.10    200  5.35    2.43    300    SKJ   MLJ 630MS  3/4    19.05   3/8   9.53    5.95    25.15    11.91    3.20    3.20   11,880    52.80    130  6.78    3.08    500    SPJ   PL 630SHB  3/4    19.05   3/8   9.53    7.50    27.70    11.91    4.00    3.20   15,800    70.20    200  9.52    4.33    500+    SPJ   PL 630SHB-Z   3/4    19.05   3/8   9.53    7.50    41.60    11.91    4.00    3.20   30,000   133.00    200  19.54    8.88    500+    SPJ   PL 630SHB 630SHB Chain per Pin 6301SHB Clip Style Master Link 6302SHB Rivet Style Master Link