Out on the A505 towards Baldock, or on the A10 north of the town, a flat tyre puts you somewhere with speed on one side and a hedge on the other.
When the car has stopped, hazards on and everyone out on the field side, well back and behind a hedge or a gate if there is one. Rural verges look safe and are not, because traffic arrives quickly and the visibility on those long straights is deceptive. Make the call from where you are standing rather than from the driver's seat.
If the tyre instead went down while you were parked on Melbourn Road or waiting at the level crossing, none of that applies. Park it properly, leave it alone and ring. The one thing that makes any of this worse is driving on.
Waiting at the roadside with a flat is mostly about not being in the way. Get as far off the carriageway as you safely can, hazards on, and everybody out and behind a barrier if there is one. Valve in Therfield, balance in Bassingbourn, pressures before we go. The wheel comes off in Melbourn Road, not on a ramp in Letchworth Garden City.

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The roads around Royston give you two problems at once: long fast straights where stopping safely is difficult, and narrow lanes towards Therfield and Bassingbourn where being seen is difficult. Neither is a place to be kneeling beside a wheel. Get the car as far off the carriageway as it will go, put people behind something solid, and let the van come out to you.
A car lost pressure quickly on the long straight towards Baldock. The driver rolled it into a field gateway rather than stopping on the verge, which put the whole vehicle clear of the road and made everything that followed straightforward.
A driver waiting for the barriers noticed the steering had gone vague and found a front tyre almost down. They cleared the queue into a side road and stopped, which was exactly right. A wheel change near that crossing would not have been.
Somebody on the Newmarket Road had already fitted a narrow space saver by the time we arrived. It was on correctly but a long way below the pressure it needs. We set it right, then fitted a proper tyre to the original wheel.
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I used their service to fix a punctured tyre. They arrived within 45 minutes and replaced my tyre. Highly recommend for urgent tyre service.
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On the field side of the car, behind a hedge, a gate or a fence if there is one, and further back than feels necessary. Traffic on the A505 arrives faster than it looks, and a stationary car is not much of a shield.
No. A tyre with no air in it comes apart from the inside within a few hundred yards, and after that the rim is taking the load and the damage. Whatever the distance, it is cheaper to stand still and wait for the van.
Space savers run at a much higher pressure than a normal tyre and are limited to fifty miles per hour. If it feels vague or the car pulls, stop. We will check it and fit a correct tyre to the proper wheel.
Completely. There is no hazard and no hurry, so it becomes an appointment rather than an emergency. Leave it where it is, do not drive it round the block to check, and we will come to the driveway.
We look at it when we arrive, and if the spot is genuinely unworkable we get the car moved a short distance first rather than working in a live lane. On the lanes around Therfield that judgement gets made fairly often.
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