The Sailun S637 235/85-16 G first came out as a multi position LT tire.
I have six Sailun S637 LT235/85-16 G on a triaxle GN stock trailer. These are the same tire as the current ST235/85-16 G. When I bought them I was given a choice of a LT or ST designation as both were in stock till the LT were sold out.
The Sailun S637 in the 16" size is nothing at all like the usual rounded sidewall profile lite weight ST low mileage tire were familiar with.
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Here is another reply from another Sailun owner;
LT or ST Sailun S637
nremtp143
Georgia
Senior Member
Joined: 08/29/2010
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Posted: 06/02/15 03:00am Link | Quote | Print | Notify Moderator
I have the GY G614s on my rig, but only had the cheap bombs as spares, so yesterday I bought 2 Sailun G637s and mounted them on my spare rims. They are the same size as the GYs and will not cause any problem with the being the same exact diameter of the GYs. In asking why the are now stamped with the ST logo, both people I spoke to in different companies said it was to get by the tariff on the LTs. Same tire, no change except for the stamping. I've been impressed with these tires since first seeing them, now I own a couple and when the 614s are due for replacement, will probably own more of them.*
We have a toy hauler forum.
Check it out as I think a Sailun S637 topic going on now (one of our trailering forums).