Forum Discussion

dragr1's avatar
dragr1
Explorer
Oct 31, 2018

Time for tires so Maxxis or Goodyear Endurance?

It’s time for tires on my travel trailer. It usually has 9000-9500 lbs on the axles. I’ve been running load range E Maxxis size 225/75/15 and have been very pleased. But I now see that Goodyear is ...
Huntindog's avatar
Huntindog
Explorer
Nov 02, 2018
JIMNLIN wrote:
Axle and trailer mfg do not offer or make a suspension lift block set up for a multiaxle leaf spring suspension. Dexter doesn't recommend using them on their axles.
Lift blocks on a commercial trailer will not pass a required annual vehicle safety inspection.

Lift blocks add even more side stress to the U bolts/top plates/spring keepers/spring hangers while side scrubbing around corners or backing maneuvers which is one big reason their not recommended.

Single axle trailers have no side scrub events so many folks use them to gain frame height.
There are two main problems with lift blocks.

1. A lot of people go overboard with the height of the blocks.. You see this a lot with lifted trucks.
2. the materials used for the blocks. A lot of them are some sort of pot metal.... or cast iron... Not good.

I have been using short 1/2" to 1.5" blocks for 20 years or so successfully. I will only use solid steel blocks. There are places that will make them for you to your spec.
A short solid steel block is not much different than adding a leaf to the spring pack, which is yet another way to gain more clearance.

At any rate, I will do what it takes to get the clearance to run 16" LT tires. The results are that good.

Having said all that..... No matter which method one uses to get the needed clearance,(lift blocks, axle flip, sub frame, shorter shackles, longer spring hangers, thicker spring packs....ETC.) it is up to that person to do it in a safe manner, with the right materials and conservative judgement.... Go for just the amount needed and no more. In most cases, all that is needed is an inch or so.

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