245/50R20 --
245*0.5 = 122.5 ~=4.822 inch +20inch =24.822 inch (链接是29.65）
235/65R17 --
235*0.65 = 152.57 ~=6.014 inch+17inch = 23.014 inch （链接是29.03）
(24.822-23.014)/24.822 ~=7.3%
哪里算错了？
245*0.5 = 122.5 ~=4.822 inch +20inch =24.822 inch (链接是29.65）
235/65R17 --
235*0.65 = 152.57 ~=6.014 inch+17inch = 23.014 inch （链接是29.03）
(24.822-23.014)/24.822 ~=7.3%
哪里算错了？