The super-singles are becoming more available, but nowhere near that of standard 22.5's. 19.5's aren't that common either. The good news is that these tires rarely fail- and when they do it's typically a result of improper inflation and on hot days. Heat kills tires. Your rig is never going to come close to max load so they'll always run cool. We had alot of blowouts on 19.5's when we had low-pro chassis- so I switched. I've had one tire failure in 1mm+ miles since going to the larger rim.
The emergency road service guys are geared up to service OTR tractors. They really have little to service the 3126's or C-7's. There are so few out on the open highways. I buy Freightliers with Cats for our fleet for the single reason that there are so many 24/7/365 FL and Cat shops on the interstates. Every one of our trucks carries a list of all the FL and CAT facilities in their operating areas. I've never had an ERS call that didn't end with a tow to one or the other.
The emergency road service guys are geared up to service OTR tractors. They really have little to service the 3126's or C-7's. There are so few out on the open highways. I buy Freightliers with Cats for our fleet for the single reason that there are so many 24/7/365 FL and Cat shops on the interstates. Every one of our trucks carries a list of all the FL and CAT facilities in their operating areas. I've never had an ERS call that didn't end with a tow to one or the other.