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71GMCstreet · 03-20-2002, 07:34 AM

L78 back in the day was the tire size, 15 is the rim diameter, B indicated Blackwall, and most likely was a pre-runner of what now is known as Mud-and Snow tires...my guess is it probably is for 4WD.

03-20-2002, 07:34 AM	#4
71GMCstreet Registered User Join Date: Dec 2001 Posts: 97	L78 back in the day was the tire size, 15 is the rim diameter, B indicated Blackwall, and most likely was a pre-runner of what now is known as Mud-and Snow tires...my guess is it probably is for 4WD.