Unexpected purchase. DM686 in Antique and Classic Mack Trucks General Discussion Posted Tuesday at 09:21 PM 2 hours ago, Vladislav said: Thanks. I do belive 14 inch would work fine for 445's. But have worries on good fit of 385 on them. If you have a minute check out the blue truck. No rush with that. I got the size wrong Vlad. After checking , I was able to get you some good info that may help you . The RD with 385's has a part # on it of 31674. Thats a 22.5 X 12.25 rim with 3 inch offset . The DM with 445's has a part # on of 13228. Thats a 22.5 X 13 with 3.94 offset. That number is no good any more . But by dimension I was able to get a new number. The new # is 32201TK . The rim part numbers are Accuride numbers . And the way I understand it . The offset is from the centre of the rim , not the outside edge. But I could be wrong , lol . Ive been wrong before . Hope it helps.