"Tyre Sizes Guide To Help You Choose The Right Tyre"
"Dunlop tyres Stockport, Car Tyres Stockport ( 750+ words)"
[ "Tyre Sizes Guide To Help You Choose The Right TyreThis guide will give you information on tyre sizes - what they are, how to convert between different systems, and why it's essential. Dunlop tyres Stockport come in all sorts of formats, not just the standard metric measures of 185/60R14 but with some unusual examples out there like the 155-540 or, even more bizarre, the 165SR13. So, where do these strange tyre sizes come from?;Well, that's precisely what this article is for! We'll explain everything you need to know about tyre sizing, including metric vs. imperial conversions and how to work out new tyres if you want something else fitted. If your car doesn't have standard-size tyres or uses an odd size (ST185/80D15), then it's likely someone has fitted the wrong tyres, and that's something we can put right.Trying to convert between tyre sizes can be confusing as there are three different systems of tyre sizing; metric, LT (light truck), and the US. In many cases, this is where people fall, but if you regularly require new tyres, it pays to be familiar with all three systems so you can ensure you get exactly what you need every time. Over the years car manufacturers have fitted a considerable range of tyre sizes from 17" - 44", so being able to identify exactly what size your car takes makes finding a replacement a lot easierClassification :;The standard classification method uses two digits after the letter R, giving a code that looks like 195/65R15 or 185/60R14. The first number is the width of the tyre in millimetres (from 50mm to over 300mm) and the letter indicates its aspect ratio (how 'tall' it is). So a 195/65R15 has a width of 195mm at the widest point and 65% of this is covered by the tread, giving an aspect ratio of 65%Let's look at how car manufacturers can come up with such seemingly random tyre sizes.Metric Tyre SizesLet's start with Metric tyres as they are by far the most common type found on UK roads. As you can see from the table below, there are two "common" systems used across all vehicles; Passenger tyres use a 185 - 540 format where the first number is the width in mm, the second number is the height of the sidewall expressed as a percentage of this width. So a 185/60R14 has a width of 185mm, and the sidewall will take up 60% of that or 117mm when inflated at an even pressure.LT (Light Truck) Tyre SizesLLT tyres are much rarer in Europe but you may find them on your car if built for US export. The LLT system uses two numbers to define both Car Tyres diameter and width with aspect ratio expressed in decimals rather than percentages, so 6.50x16 dimensions indicate 6" diameter tyres with a 50% aspect ratio. Initially, there were only two sizes in this format but they are now almost exclusively used on large LCVs.US Tyre SizesFinally, we have the US system, which is rare in Europe but can be found on some cars built for American export. The 37x12.50R17 tyre shown in this table would have a diameter of 37" and a width of 12.5"Aspect ratio :;Aspect ratio is expressed as an odd percentage so the sidewall height will be 50% off 37/3 which makes it just under 11", similar to LT tyres with a slightly lower aspect ratio than their Metric counterparts (LT tyres typically use 55 or 60%)So that explains what those funky looking tyre sizes like 225/75R16, 235/85R16 and 265/70R15 are but what do they measure? Well, it's a complicated business as you can see from the table below!Width :;The first number is the tyre diameter, the second number is the width which has to be multiplied by 2.5 (so 235 becomes 710mm) and finally, this value needs to be divided by 0.6 (the tread depth). Treads come in varying depths but typically range from 10 - 20mm with modern tyres tending towards 18 or 19mm.Now that we've covered how car manufacturers work out their tyre sizes we should probably address your concerns about buying replacement tyres for your vehicle...If standard tyres don't fit correctlyThe most likely cause of problems is the incorrect aspect ratio. Some cars are susceptible to this, with the "tall boy" look on some BMWs being largely down to tyres with too high an aspect ratio. This results in bulging of bodywork between the front and rear wheels, potentially leading to rubbing against alloy wheel arches. Replacement tyre manufacturers do not publish exact ratios for their tyres so choosing replacements can become quite a hit or miss affair.You can get close enough by using known dimensions, but if you don't want to go through the hassle of measuring up all around, you would be better off sticking to standard sizes than taking chances on new Car Tyres Stockport;!" ]