BERLIN — Using giant tires from an industrial fertilizer spreader and scrap steel, a German man has built a bicycle weighing 2,072 pounds that he plans to pedal into the record books as the world’s heaviest rideable bike.

Frank Dose’s bike already outweighs the current Guinness World Record holder’s 1,900-pound contraption.

But the dpa news agency reported Monday that Dose plans to add weight to boost his creation to 2,646 pounds before attempting the 656-foot ride Saturday.

The 49-year-old Dose has been building his bike since March. It sports tires that are 5 feet in diameter. It’s reportedly proved surprisingly easy to ride.

“It’s a sensational bike,” says his wife, Astrid.