plowing with 185

Personally I would go 4-14's for sure especially if you say your ground is hard. Our 200 struggles with 5-16's in heavy bottom ground. I'd bet your 185 will handle 4-14's just about right. I've never been around a 185 but we have had 180's before. Just as a side note grandpa was looking at a new 180 that the dealer promised would pull 4-16's in heavy, heavy clay river bottoms and the dealer brought it out to the field and it wouldn't touch it, sent for a 190 XT, wouldn't pull it, sent for a 200, it pulled it barely, so he plowed the rest of the field with the 200 and he almost bought the 200 but a certain loved one would let him spend the extra money so he got a 180 and 3-16's. Sorry that don't have much to do with your question but thought I'd share that story

Using a d-19 I can plow just about anything with the 4-14's. Last year plowed hillsides when it was raining with duals on both sides it did okay for the steep hills from 15% to 23% grades on the hillsides.