hi everyone . i finally got my calkins trailor finished . the rollers line up on the boat now , and i moved the axle back 6 inches to get the right tongue weight . my son came in the house this morning and asked me why i had 2 different size tires on the trailor . i went outside to check and sure enough on the left side of the trailor there is a 78x14 and on the other side is a 70x14 . can anybody tell me what size tire i should have on this trailor ? the boat is a 16 foot larson senza with a 140 johnson . thankyou .