– Tyrepress

Ask a fleet manager why the fuel bill went up last quarter, and you’ll usually hear about pump prices, a new driver with a heavy right foot, maybe a contract that added some long runs. Fair enough. Tyres almost never come up, which is odd when you think about it, because every litre the engine burns has to go through four (or six, or eighteen) patches of rubber before the vehicle moves anywhere.

Tyre problems don’t announce themselves. A van loses a bit of pressure, an alignment gets knocked out on a speed hump, and nobody thinks twice. Across a fleet of thirty vehicles doing real kilometres, those small things turn into real money. Below we look at why tyres matter for fuel, the four issues that do the most damage, how your fuel records can point to them, and a routine that keeps it all from getting away from you.

Why Tyres Have a Direct Impact on Fuel Consumption

A tyre isn’t a rigid wheel. It flattens a little where it touches the road and recovers as it rolls on, thousands of times every kilometre, and each of those squash and spring cycles loses energy as heat. That loss is rolling resistance, and the engine pays for it in fuel. Manufacturers and energy agencies have been saying for years that it makes up a decent share of a vehicle’s consumption, more so for trucks carrying heavy loads.

For a single car it’s small change. For a fleet of utes and vans out six days a week it stops being small, and sooner or later someone in accounts will want to know where the money went. In most cases the answer is one of a few boring, very fixable problems.

Four Tyre Issues That Cost Fleets the Most Fuel

None of these are exotic. They show up in almost every fleet, and most of them are cheap to sort once you know they’re there.

Underinflation

This is the big one. A soft tyre flexes more than it was built to, so rolling resistance goes up and the casing runs hotter. Pressure leaks away slowly (a few PSI a month isn’t unusual), and drivers just don’t feel it from the seat. It can go on for weeks until someone finally puts a gauge on it. Running tyres below the recommended pressure tends to cause:

• Higher fuel use from added rolling resistance;
• Faster wear along the tread shoulders;
• Extra heat and a greater chance of a blowout;
• Longer stopping distances and sloppier steering.

A gauge and five minutes on a Monday morning would prevent most of this, which is what makes it so frustrating.

Poor Wheel Alignment

Misaligned wheels don’t roll straight. They drag sideways ever so slightly, scrubbing off rubber and making the engine work harder to keep the vehicle moving. Fleet vehicles get bashed about far more than private cars, between kerbs, potholes and the odd unsealed site road, so alignment goes out more often than people expect. 

Plenty of operators only book a check once the tread looks chewed, by which point the extra fuel has been going out the door for months.

The Wrong Tyre for the Job

Chunky all-terrain tyres look great on a ute. If that ute spends 95% of its time on the highway between Brisbane and the Gold Coast, though, all that tread is mostly adding resistance and road noise. Low rolling resistance tyres are made for vehicles with steady highway or city work, and over a year the switch can make a noticeable difference. Pick tyres for what the vehicle actually does, not for the one weekend it might go bush.

Temperature and Load Swings

Pressure moves with temperature. Check a tyre at 6am on a cold Canberra morning and again at 3pm on a 38°C day in Western Sydney and you’ll get two very different numbers. Load plays a part as well, since a van with a full pallet in the back needs more pressure than the same van running empty, and vehicles with changing loads end up wrong for the day’s job more often than not. You can’t spot any of this by eye, so you need something that flags it for you.

Using Fuel Data to Spot Tyre Problems Early

Here’s the useful bit. A tyre problem usually shows up in fuel figures before anyone notices odd wear, as long as someone is tracking litres per 100 km for each vehicle. Once you have a baseline, a jump stands out. If van 12 is suddenly using more than it did in winter, or more than van 14 on the same run, it’s worth a look, and tyres are an easy first suspect.

Doing this from paper receipts is a nightmare. Businesses on fleet fuel cards are in a better spot here, because they get transaction reports by vehicle and driver with the site, litres, and usually the odometer reading included. No more chasing crumpled dockets out of glove boxes. The fuel record more or less turns into a maintenance alert if somebody bothers to read it. Patterns worth investigating include:

• A slow climb in litres per 100 km on one vehicle with the same route and load;
• One vehicle using clearly more fuel than identical ones doing similar work;
• A spike right after a pothole, kerb strike or rough site job;
• A sudden drop in consumption after a tyre service (meaning the problem was there for a while).

Fuel numbers won’t diagnose anything on their own. They just tell the workshop where to start.

Building a Simple Tyre and Fuel Routine

Fleets that get this right tend to treat tyres and fuel as one job rather than two. The fuel report flags a vehicle, and the tyres get checked. After a tyre service, someone watches whether consumption drops the following month. It doesn’t need fancy equipment, only a bit of discipline and one person whose job it clearly is. A routine that works for most fleets looks something like this:

• Cold pressure checks on a fixed schedule, against the load placard;
• Alignment checks after any decent impact and at each service;
• A monthly look at consumption per vehicle from the fuel reports;
• Tyres chosen for the vehicle’s real duty cycle;
• A simple log of tyre work, so fuel changes can be matched to it.

It’s not glamorous stuff. Done consistently, though, it turns tyre maintenance from a surprise repair bill into a saving you can actually point to.

Final Thoughts

When it comes to fuel, tyres get far less attention from fleet managers than they deserve. Low pressure, bad alignment, the wrong tread, and pressure that shifts with heat and load all add resistance, and the engine pays for every bit of it. Each issue is minor in isolation, which is exactly why they hang around so long. Put regular tyre checks next to per-vehicle fuel data, and you’ll catch most of them while they’re still cheap to fix.