What a program covers
- The equipment list, with tire specifications per machine and per application.
- Scheduled inspection, so damage is found while it is repairable and casings are pulled while they are worth retreading.
- Fitting and change-outs, planned around the site's shift pattern rather than around a failure.
- Repair, because on tires this size repair is frequently better value than replacement.
- Retreading, through Purcell's plants. Six list OTR casings among what they retread.
- Wheel refurbishing, at 42 locations, which keeps damaged wheels in service.
- Reporting, so the cost per hour is a number somebody can read rather than an impression.
Why the program rather than the tire
Two identical tires on the same machine can differ by thousands of hours depending on pressure, load, haul road condition, speed and how quickly damage is caught. That spread is larger than the difference between most tires on the market, which is why the management is worth more than the purchase.
Put plainly: a site that runs an average tire well beats a site that runs a premium tire badly, and it is not close.
What it is built around
Safety. OTR tire work carries real risk, from stored energy in inflated assemblies to the weight of the components. Scheduled work in controlled conditions is safer than emergency work at a loading face.
Availability. A haul truck down for a tire is a haul truck not moving material. Planned change-outs during a maintenance window cost a fraction of unplanned ones.
Cost per hour. Tires are one of the larger consumables on a mining site, and the levers that move the number are inspection, pressure, repair and retreading rather than unit price.
What it changes day to day
The visible difference on site is that tire work starts appearing in the maintenance schedule instead of in the incident log. Change-outs happen during planned windows, damaged tires get repaired before the damage reaches the casing, and the pile of scrapped tires behind the workshop stops growing at the rate it did.
The invisible difference is that somebody is tracking which machines are consuming tires faster than the rest, which is usually the first sign of a haul road problem rather than a tire problem.
Who it is for
Mines and quarries running haul fleets. Aggregate and sand operations. Heavy civil contractors on long projects. Industrial sites running loaders and large material handlers. Operations too small for a formal program use OTR services at 41 locations instead, and many customers start there.
Starting one
Have this ready and the first conversation does most of the work:
- The equipment list: make, model, tire size, quantity.
- The application and surface for each machine.
- Hours per shift and shifts per day.
- Current failure modes: cuts, impacts, heat, sidewall damage, wear.
- Site access, safety requirements and induction.
- Who authorizes work, how you want it invoiced, and what reporting you need.

