Before A Long Drive: What A Tyre Shop In Lismore Checks First

Yes. If you've got a highway trip booked, whether it's the Pacific Motorway run to Brisbane, the Summerland Way south to Grafton or a caravan hitched up for a coastal holiday, get your tyres looked at before you leave, not after something goes wrong at 100 km/h.

A tyre shop in Lismore that does this daily isn't checking for cosmetic wear. We're checking tread depth against highway demands, tyre age against the DOT date code, pressure against your actual load and balance against the vibrations that only ever show up once you're off the local streets. Most of the time the verdict is good news: a pressure reset, a balance and an alignment and you're set. Sometimes it's not and that's exactly why the check happens before departure day, not the morning of.

The legal minimum in Australia is 1.5 mm across the tread, measured at the wear indicators moulded into the tyre. That's the line the law draws. It's not the line a workshop draws for a 400 km highway run.

Tread depth affects how quickly water clears from under the tyre. At town speed around Lismore, a tyre sitting close to that legal minimum might feel fine. Push it to motorway speed in Northern Rivers rain and the margin for error shrinks fast. Braking distance stretches, aquaplaning risk climbs and the difference between ‘technically legal’ and ‘safe for this trip’ becomes obvious.

This is one of the simplest things we check on a pre-trip inspection: not just whether the tread passes, but whether it's got enough left in it for the specific drive you're planning. A tyre that's fine for the school run isn't automatically fine for towing a van to the coast.

This catches people out more than any other check. A tyre can have plenty of visible tread and still be the wrong tyre to start a long trip on, because rubber degrades with age regardless of how many kilometres it's covered.

Bridgestone's own guidance is replacement around six years or 64,000 km and a tyre over ten years old shouldn't be used at all, no matter how healthy the tread looks. Heat, UV exposure and simple time harden the rubber compound and reduce its grip and that process doesn't show up as tread wear.

Every tyre has a DOT code stamped on the sidewall, usually the last four digits, that tells you the week and year it was manufactured. Two digits for the week, two for the year, so 2318 means the 23rd week of 2018. It's easy to check yourself once you know where to look and it's one of the first things we check on any pre-trip inspection, because a customer with a Brisbane trip booked for Friday needs to know now, not at the halfway mark on the M1.

The pressure figure on your vehicle's door placard is set for normal, unloaded running. Add a boot full of luggage, four passengers and a van on the tow ball and that figure no longer applies.

Most vehicle placards list a separate laden or towing pressure alongside the standard figure. It's worth checking before you leave home and setting it cold, before the tyres have warmed up from driving. Under-inflated tyres run hotter under load, wear unevenly and lose the sharp handling you need when you're already dealing with the extra weight of a caravan or a loaded ute tray.

We've covered why correct tyre pressure on Lismore roads has such a big impact on grip, braking and wear in more depth elsewhere, so we won't repeat all of it here. The short version for a long trip: check it against the laden figure, not just the number you're used to running day to day.

A wheel that's slightly out of balance or one that's dropped a balance weight somewhere along the way, often won't announce itself around Lismore's local streets. It's a highway-speed problem. Get up to 100–110 km/h on the motorway and a vibration through the steering wheel or the seat suddenly becomes the thing you can't ignore for the next three hours.

Electronic wheel balancing comes standard with every tyre fitting we do and an out-of-balance wheel is one of the more common finds on a pre-trip check, even on tyres that are otherwise in good shape. If the vehicle's due for new tyres anyway, or if there's steering shudder above 90 km/h, it's worth booking wheel alignment and balancing at the same time as your tyre check so it's all sorted in one visit rather than two. Fitting new tyres to a car that's out of alignment also means those new tyres start wearing unevenly from day one, which defeats the purpose of replacing them in the first place.

Sometimes the honest answer is that a check isn't enough. If tread is marginal and the dangers of low tyre tread become far more serious once you're carrying highway speed in the wet, if the DOT code shows a tyre pushing past that six-year mark or if there's sidewall damage from a pothole or a gravel road edge on one of the rural approaches into Lismore, no amount of pressure adjustment or balancing fixes that. New tyres are the right call and we'll say so plainly rather than patching over a problem that's going to matter 200 km from home.

But it works both ways. If tread is even and healthy and the tyres check out on age and condition, the right recommendation is usually a pressure reset, a balance and an alignment, not four new tyres you don't need. That's the trade-off worth knowing: a pre-trip check isn't a sales pitch, it's a genuine assessment of what your specific trip needs.

One practical note: if new tyres do turn out to be necessary, they may need to be ordered in. Booking your pre-trip check about a week before departure, rather than the day before, gives enough time to sort it properly instead of scrambling.

Local road conditions play a part too. Lismore's mix of flood-repaired surfaces, patched sections and gravel edges on some of the rural approaches can cause sidewall damage, uneven wear and reduced wet grip that's worth catching before a long run, not discovering on it. Don’t forget the spare. Many newer vehicles carry a space-saver limited to around 80 km/h and short distances, which is a real problem if you're 200 km down the Summerland Way when something goes wrong. Checking the spare and the jack is part of the same pre-trip routine.

If you're leaving on a long drive this week, the fastest way to rule out a problem is a quick pre-trip inspection at a trusted tyre shop in Lismore before you hit the highway. Call South Lismore Automotive on (02) 6621 3116 or head to our tyres page to book in.