It matters. A blown steer tire is a stop-now safety event — you should not move the truck beyond getting safely off the road, and the replacement must match the opposite steer closely. A blown drive or trailer tire on a dual set can usually be crept a short distance at low speed, but running on the mate destroys a second tire fast. Either way, a mobile tire tech brings the tire to you and has you rolling in about an hour on site.
Steer tires carry the truck’s ability to steer, full stop. After a steer blowout, get off the traveled lane and stay put — and when the replacement goes on, a good tech checks the opposite steer’s tread depth and brand, because a mismatched steer axle handles badly and can be flagged at inspection. Expect the tech to also look at what killed the tire: impact break, underinflation sidewall failure, or age.
Drives and trailer positions are more forgiving because of duals — the mate carries the load briefly. Briefly is the key word: every loaded mile on a single overloads and overheats the survivor. If you must move (out of a live lane, to the next exit), keep it slow and short, then stop.
When you request a tire through RIG, dispatch asks for the number off the sidewall (like 295/75R22.5), the position, and whether you have a usable spare. With the size confirmed, the bidding tech loads the right tire before rolling — the single biggest factor in one-trip tire calls. Casing condition, load, and position all go to the mechanics with your request.