Two tyres on the same axle are not two separate purchases. The car treats them as one system, and it does not divide the work evenly between them if they are different. Two carcasses of different construction have different stiffness and, under load, slightly different rolling diameters.
The consequence is heat. The softer, weaker casing deflects more on every revolution and every bit of that deflection becomes heat in the rubber and at the belt edges. Heat is what separates a belt from the casing it is bonded to. So on a fast road on a warm day the odd one out is the one that comes apart, usually without ever having been punctured. The driver afterwards says a tyre burst for no reason, which is true only in the sense that nothing hit it.
A mismatch of sizes on one axle does the same thing more crudely. A tyre a section narrower than its partner carries less than half the load and turns at a different rate, and something eventually gives. If a tyre has let go on the A23 and the two on that axle do not match, that is where we start looking.
Recovery cover pays somebody to move the car. A mobile fitter finishes the job instead: one call, a technician sent to where you are stopped in SW16, stock already loaded, and the wheel back on before the recovery truck would have arrived. Nothing is towed out of Green Lane or Pollards Hill; the work finishes there. Pressures set before we leave Pollards Hill, and the same on Green Lane.
Burst tyre replacement in Norbury is part of our wider 24-hour emergency callout across London and the home counties cover. For burst tyre replacement in Norbury, call 07717 389637 or ask us for a quote.
The A23 through Norbury is a fast, heavily used route where cars hold a steady speed long enough to get properly hot, which is the condition that finds a mismatched axle out. It is also a poor place to be standing at the roadside. We come to wherever you have stopped with the size aboard.
A car stopped at the kerb off London Road had a premium tyre on one front corner and an unbranded one on the other. The unbranded one had lost a section of tread in a single piece, with belt showing underneath and no puncture in it.
One tyre a size narrower than its partner had gone on at some point as a quick answer to a flat. It had spent months carrying more than its share and gave up on a warm afternoon. We fitted a matched pair.
A car in SW16 still carried one winter tyre on the front from two seasons earlier, next to a summer one. Softer compound, deeper blocks, more movement and more heat. It was the one that failed.
Mixing sizes or constructions across an axle is not permitted, and radial with cross ply is out altogether. Mixing brands of the same size and construction is legal but not sensible. Law and good practice do not line up neatly here.
Read the sidewall on both. You want the same size string, the same load index and the same speed rating on each side of the axle, and ideally the same make and pattern. It is moulded in plain figures and takes a minute to check all four.
Age is not the variable that matters most here. Construction is. A newer budget tyre next to an older premium one is still the one running hotter and deflecting more, and it will go first whatever tread it has left.
Common car, SUV and 4x4 sizes travel with us, so a matched pair on one axle is usually possible on the first visit. Where the exact pattern cannot be matched we fit two of the same thing to that axle.
★★★★★ 4.9 from 151 verified Google reviews.
Read all 151 reviews on Google →Prefer a callback? Send your details for a burst tyre replacement price in Norbury.