As already mentioned, it is important not to mix tyre sizes or types on motorised machinery as there can be significant variation in heights and widths between different manufacturers. We have even found that sometimes tyres of exactly the same size marking can vary significantly. As with car tyres, we would suggest you replace your tyres in pairs to ensure optimum performance. It is important not to mix tyre sizes or types on motorised machinery as there can be significant variation in heights and widths between different manufacturers. We have even found that sometimes tyres of exactly the same size marking can vary significantly. As with car tyres, we would suggest you replace your tyres in pairs to ensure optimum performance.

The tire producer / manufacturer of the tires you are buying, and Canadian Tire is responsible for the recycling fee that is included in your invoice. The tire producer / manufacturer and Canadian Tire uses this fee to pay for the collection, transportation, and processing of used tires.The load index and speed index is gradually replacing the PR marking for tyres. The load index is given by a number between zero and 159 in our chart, but can be much higher. The speed index is given by a letter (or letter and number in the case of 'A' speed rating) between A and Z. Typical examples for our type of tyres would be 68M, 55N or 38F. Any ATV tyres we list with this marking will also be 'E' marked and fully road legal. Contrary to the PR marking, the LI and SI give unambiguous and comparable information on the load capacity which can be drawn from the tables below; Speed symbol This method is becoming obsolete, but you may still have tyres marked in this way. Measurements can be in inches or millimetres (look at the examples above, it's fairly obvious which is which). The first part is the overall tyre height, the second is the tyre width.

Valves come in different shapes & sizes to accommodate a wide variety of applications & wheel rim configurations. There are four main categories that inner tube valves fall into & within each are a handful of popular valve models to choose from: W hen considering rim diameter, please be aware that it is effectively the diameter of the hole in the middle of the tyre. The measurement from edge to edge of the wheel itself includes the tyre retaining rim flanges, and so will be about 1" greater than the actual marked size. So, a 145R10 is a radial tyre, 145mm wide, sidewall height of 116mm (80% of 145mm) and fits a 10" rim. A 195/50R13 tyre would be 195mm wide, have a sidewall height of 98mm, and fit a 13" rim. The approximate overall height of the tyre can be worked out by converting both dimensions to either mm or inches, and adding the rim diameter to twice the sidewall height. Originally, tyres were marked with the exact number of canvas layers (plies) built into the tyre. This was an indication of the strength of that particular size of tyre. It's fairly obvious that a 4 ply wheelbarrow tyre will have a different load capacity to a 4 ply car tyre. As stronger materials were developed, the number of layers could be reduced whilst still maintaining the same strength in the tyre. The designation Ply Rating therefore does not indicate the actual number of layers or plies in the tyre, but the number of layers originally required to give the desired load capacity. When working with PR marked tyres, you must use the actual manufacturer's data to determine the load capacity in kg. This value can often be found on the side of the tyre adjacent to the ply rating indication. Off our original price. Quantities may vary by store. Some clearance product and price points may not be available at all locations.

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This method is widely used on turf and ATV tyres and is probably the easiest to understand. The first part is the overall height (from the ground to the top of the tyre) of the tyre in inches, the second part is the width of the tyre in inches, and the third part is the rim diameter in inches. The rim diameter is not mentioned in this size marking, but it can be easily worked out, because the tyre sidewall height will be the same as the tyre width. So, an 18x4 tyre is 18" tall, 4" wide, and fits a 10" diameter rim (18" overall height minus two lots of 4" high sidewalls). The modern equivalent size for an 18x4 would therefore be 4.00-10. This time there are three parts to the tyre size, all in inches. The first, 4.10, is the approximate width of the tyre when fitted to the recommended wheel. The second, 3.50, is the height of the sidewall, and the third is the rim diameter. A 260x85 tyre would be 260mm high and 85mm wide. Converting these dimensions to inches gives us a tyre 10" high, 3" wide on a 4" rim. The modern equivalent size would be a 3.00-4.