Leveling blocks

Thanks to all for the input. Seems like the safest choice is to block both tires of the duals, not just one.

wanderingbob wrote:
Do ya really think that you need both to be blocked , he ain't driving any where . Many times in that tires life it will climb a curb or a pot hole without damaging the tire .

Yes, but it doesn't sit that way for days. Put blocks under both duallys on the same side of the rig when lifting. Never have a tire off the ground unsupported for longer than is absolutely necessary.
After all, how hard is it to put 2 ramps down when you are already putting 1 ramp down?

Read the Michellin link provided above. Good Info from the source.

I use 3/4" plywood with a handle cut in it. I put a block under both rear tires if needed. Then use hyd levellers

Personally I would rather have a tire rated at 2800 pounds supporting no more than 2800 pounds. With only one tire on blocks it could support as much as 5600 pounds. No thanks.

I have duals on my MH and always put the same number of blocks under the inside wheel as the outside wheel. However, if I were in a situation where I could only put blocks under one wheel, I'd put them under the inside wheel rather than the outside wheel. By putting them under the inside wheel, all the weight is supported by the wheel lugs as close to the hub as possible and the outside wheel is allowed to hand free. Putting them under the outside wheel moves the supported weight a bit further out on the lugs while the inside wheel hangs free.

I took it that the OP was asking about blocking both dual wheels on a side. Answer to that is yes it's a good idea to do it.

Although I came across a video the other day of an rv dealership showing how to set up a TT. The TT had tandem axles. They guy only put leveling blocks underneath one wheel.

Do ya really think that you need both to be blocked , he ain't driving any where . Many times in that tires life it will climb a curb or a pot hole without damaging the tire .

I think the question posed by the OP was whether or not both left and right side needed to be on blocks, not if both front and rear axle on one side needed to be on blocks.

FWIW, I don't put blocks under the left side tires if it is the right side that needs to come up to make the trailer level (or vice versa). That would just require 3 times as many boards or leveling blocks without changing the load on the "down side" tires IMO.

Both dual tires should be on blocks. For good info. on tires, download and read the Michelin RV Tire Guide from this page.

You should use blocks on both wheels to prevent too much weight on one tire. Also you must use a large enough block(s) to provide support across the entire tread foot print. If you use too small of blocks you can damage the tread or bands of the tire and will cause premature failure. Usually tread separation.

I use 24 in. long 2X4s blocks layed out side by side (usually four or 5) which provides full coverage of the tread foot print on my duals. If I need more height I stack the 2X4s log cabin style but the top row is always perpendicular to the the RV.