Roadone Long-hual Standard Load Series 12R22.5 18PR ★ RD05, after more than a year, its excellent performance is very popular with customers. d on this size, Roadone promotes a new size suitable for long-hual standard load transport, which is 12R22.5 18PR RD05. Compared with 18PR RD05, 18PR ★ RD05 has better loading capacity.