Complex sentence: Bicycles were the primary mode of transportation in Asia during the 1960s so it was in producing bicycle tires that Maxxis got its start, eventually becoming the largest manufacturer of bicycle tires in the world-as it remains today.
Split into simpler sentences: Bicycles were the primary mode of transportation in Asia during the 1960's. And so it was in producing bicycle tires that Maxxis got its start, eventually becoming the largest manufacturer of bicycle tires in the world-as it remains today.