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Sutcliffe

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Posts posted by Sutcliffe

  2. Posted · Report reply

    On 3/9/2018 at 9:24 PM, Cdrifter99 said:

    I am also due to change out my g670 tires on a Monaco 40-footer. On all four corners I'm running within 10%-15% of load limits. I would like to move from the 275 80r to the 295 80r. Can I mount these wider tires on the same rim? Staying in load range H the 295 provide about 700 more pounds of load carrying capacity. I like having a little more breathing room in my normal carry weight to maximum capacity.

    I am also changing my Goodyear 670s to Michelins next week. I currently have 295 on front and 275 on the rest. My regular service guy recommends same size all around? Any thought on that.  Thanks...Mark

  3. Posted · Report reply

    On 3/10/2018 at 7:58 AM, richard5933 said:

    Back when I started driving it was quite common to order a car instead of buying one off the lot. I remember my father sitting and going through the various option groups on the 'menu' of available choices. One of those option groups was for towing and another for performance. It was possible to have the car ordered with special tires/wheels directly from the manufacturer to meet certain goals such as towing or going fast.

    When a customer selected tires different from the 'standard' tire, there were other (usually not seen) options that were required to make them play nice with other components. Different gauges to adjust for different tire diameter, heavy-duty rear axle, different suspension components to carry the extra weight, etc, etc.

    What I'm trying to say is that there is much, much more involved in the selection of tire sizes than just getting the largest size which will fit in the opening. What will be the result of larger tires in all possible scenarios is not always evident. What will happen if one of the air bags fail and the vehicle drop? Would be a shocker if the tire hit the upper side of the wheel well and damaged something. Will you require taller frame bumpers? How will it affect handling? What will be the consequence on other components of the extra unsprung weight?

    In my opinion, I'd stick with the tire size that the manufacturer recommends. If it's not on the placard or in the manual as an optional size, then I'd stay away from the change. There are many calculations involved, and I have to assume that the engineers designing a vehicle did the math when they selected the tire size on the vehicle.

    All that said, the earlier comment regarding load capacity is spot on. Merely increasing the load capacity of tires doesn't automatically increase the vehicle's load rating. Probably won't affect it at all, since the load rating is based on many components and system such as axles, brakes, steering, etc.

    Hi there.... I am replacing my Good Year tires 295 Front 275 rear with Michelins next week. But my regular service guy is recommending same size all around. I have yet to find any information that supports or refutes this idea? Any thoughts?  Thanks...

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