Function of Tractor Tires. Radial tractor tyres have many benefits over the older crossply versions, as they are designed to flex more and dissipate heat better. Perfect for tractors operating on golf courses and other grounds maintenance machinery. R2 - The R2 pattern has a very deep tread and is designed for extremely wet or sticky soil. Product Code: sh18.438mich10. There are two organizations, Tire and Rim Association (TRA), and European Tyre and Rim Technical Organisation (ETRTO), that influence tire standards. If however you want to go to a wider (or narrower) tread for more traction or flotation then you can also use the table below to convert your 16.9-38 into the wider but lower profile options of 480/70R38, 540/65R38, 600/60R38. They may sometimes have shoulder lugs or zig-zag ribs and can often be similar to I-1 Implement tyres. The last number is still the rim size. Look on the sidewall of the tractor tire. For expert help and advice please Contact Us. The letter 'R' informs us its of Radial construction (not the older crossply construction). The lug design is an 'L' or 'hockey stick' shape that overlaps slightly in the middle of tread. The last number is the rim diameter in inches (the hole in the centre of the tyre). Example of load index based on tire size: A 520/85R42 with a 157 LI and an A8 speed symbol has a maximum load of 4125 kg (9100 lb) at the required cold inflation pressure of 159 kPa (23 psi) and maximum speed of 40 km/h (25 mph). We have tyre options to suit the smaller, lower horsepower tractors right the way up to the larger, high-powered tractors. While you can put different sized tires on a tractor, you need to make sure the rims are still a match. Metric Tractor Tyre Sizes - 420/85R28, 460/70R26, 540/65R38 Most modern radial tractor tyres are marked up with metric sizes such as 420/85R28, 460/70R26, 540/65R38. Use the table below to quickly convert your older imperial crossply markings into their newer metric radial marking. Even the tires on your trusty tractor eventually need to be replaced. Starting in 1972 tires were specified by load rating, using a letter code. The second value (55) is the tyre profile in percentage. Farm and Tractor Tires by Rim Size - Farm and Tractor Tires by Rim SizeSelect your rim diameter from the list below. Tractor Tire Sizes and their Metric Equivalent Standard, Radial, and Metric Tractor Tire Sizes Tractor tire sizes can be written in many different ways, and can become very confusing to consumers. These tyres are often available with notches or lugs in the outer ribs to improve grip and self-cleaning. Buy mower tyres only. Tire sizes are defined by specifications such as the type, width, aspect ratio, speed rating, tire construction type, and service description. Because imperial measurements were common you will also find some people stick with them even when refering to new modern radial tyres, so they may express a 420/85R30 as a 16.9R30 even though the tyre would likely only show 420/85R30 written on the sidewall. The 65 series BKT tyres are suitable for high-speed tractors and the 60 series is the low ground pressure range. It is also referred to as a tractive tractor pattern. Determine the size when there are three numbers. So, an 18x4 tyre is 18" tall (outer diameter), 4" wide (section width), and fits a 10" diameter rim (18" overall height minus two lots of 4" high sidewalls). Where you see a block of two or more compatible sizes, having the same bead diameter, you can assume that intermediate sizes exist that will also fit the same rim. The second number in our lawn tractor tire size is 6. The higher speed limit applies to tractors that have (among other requirements) all-wheel suspension, braking efficiency of 50%, pneumatic tyres, a speedometer and a horn. This number refers to the overall diameter of the tire or the tire height. Use the table below to help you find radial tire size equivalents and metric conversions. So CPM has checked out some of the top tyres available to meet the differing needs of the grower. For example: between 18–622 and 25–622 there are tyres of 19, 20, 22 and 23mm section. What sets us apart is our tyre suggestion guide. Modern radial tractor tyres will all have a series of 3 or 6 numbers on them which indicate how much weight the tyre is designed to carry at set speeds. Their size markings are written in imperial numbers such as 12.4-28, 16.9-30, 18.4-38. They offer high flotation and load capacity at lower pressures and make for a good all-round tyre. If you purchased your tractor used, you may find that the tires on it are not tractor tires. With the older imperial markings it is generally assumed that the profile percentage is 85%, so use that if you want to keep the tractor tyres width and height the same as the current crossply size (ie.16.9-38 = 420/85R38).. Tire size was again specified by width in inches and diameter in inches. The standard method of size expression is relatively simple, but not as descriptive as metric.An example of tractor tire sizes expressed in the standard format would be “14.9-42”. Most common size lawn mower tyres. Buy mower tyres only. Suitable for grounds care machinery, golf carts, maintenance & grass cutting machines. The table below lists most of the sizes of tyre that are likely to be found in the UK. It is ideal for traction in field work. The tire size can be composed with two sets of numbers, for example: 6.50-16, 12.4-24 or 18.4-38 1. number 6.50 -16 is the width in inches 2. number 6.50- 16 is the diameter of the rim. The first number is the width of the tire in inches, and the second is the diameter of the rim in inches. The first type (16.9-28) is imperial written in inches, and the second is the newer metric marking now being adopted by many manufacturers. “The only exception to fitting a lower speed rating to a vehicle is when you come to fit winter tyres to your vehicle – as long as you don’t exceed the tyres maximum speed limit.” The first number is the width of the tire in inches, and the second is the diameter of the rim in inches. Determine the size when there are three numbers. F3 - an Industrial tractor front pattern that is flatter than traditional F2 rib tractor tyres and so are optimised for road and hard-surface performance. The '-' symbol again tells us the tyre is of crossply construction. Inner tubes typically state a wheel diameter and width range for which they will work, e.g. To accept cookies from this site, please click Accept. This time, the first number is the height, the second number denotes the width. Tyre Inner Tubes, Quad Bike Tyres, ATV Tyres, Turf Tyres, Wheelbarrow Tyres, Ride On Lawn Mower Tyres, Golf Buggy Tyres, Sack Truck Tyres : TYRE SIZES EXPLAINED - Golf Buggy Tyres & Wheels Implement & Wheelbarrow Tyres Trailer Tyres & Wheels Mobility Scooter Grey Tyres Go Kart Tyres Kite Buggy Tyres & Beach Wheels Inner Tubes For All Applications Linseal OKO Tyre Sealant Stops … Older tyres don't have these markings but may have a Ply Rating on the tyre. You may see something like 153A8 or 163D. The first number in the sequence is the tyre’s width measured in millimetres, so in this example we can tell that the tyre is 195mm wide - a common width for superminis and smaller family cars. Writings by Finch have appeared in the Western Herald, the Sturgis Journal and eHow.com. This code specifies the dimensions of the tire, and some of its key limitations, such as load-bearing ability, and maximum speed. Mitas EM tyres designed for excavators, loaders and other construction equipment have universal use and can therefore also be used for agricultural machinery. The modern equivalent size for an 18x4 would therefore be 4.00-10. The first number in the marking is the tyres width in millimetres. Buy Rear Tractor Tire Tubes; Buy Front & Implement Tubes; Buy Lawn Tractor Tubes; Chains. Determine the size when there are three numbers. If your tire reads "15/6.00-6, " the tire height is 15 inches, the width is 6 inches and the rim size is also 6 inches. on the tyre side wall. In general, to ensure correct operation you are advised to keep with the same construction as you currently have, and to ensure you have the same construction on both sides of any axle. Tractor tire sizes can be written in many different formats. They are still used as they are often cheaper to produce and can also provide a firmer ride which is a benefit for some applications like on scissor lift platforms. The Traxion Optimall is a very high flexion (VF) tractor tyre, which ties in traction […] UK based with huge selection of tractor tyres. 02.03.2019 Preventative Tire Maintenance to reduce downtime. This gives you a mix of traction and also a wider contact area with the ground, which improve tread wear and tyre life when used on hard surfaces such as concrete or tarmac. Determine the size if there are two numbers. They are used on a huge range of farm implements and trailers. Simply put, it is made up of a series of numbers. I-1 - The I-1 pattern is also referred to as a "Multi-Rib" tyre. Flotation Transport - Designed for stability and road performance without sacrificing flotation and grip in the field. They are used on a range of farm trailers and implements. This website requires cookies to provide all of its features. Even the tires on your trusty tractor eventually need to be replaced. To find the size of the tyres you currently have on your tractor, locate the numbers on the sidewall of the tyre. Count how many numbers are on the sidewall. Most common size lawn mower tyres. They are popular in all countries and primarily in Agriculture rich nations. Below is an example of an RCI Chart from Goodyear Titan: Goodyear Titan Ag Tire RCI Chart *Please note manufacturer RCI Charts only contain tires sizes produced by that specific manufacturer. “We stock Agrimax 60, 65, 70, and 85 series tyres. Heather Finch has been a freelance writer since the turn of the 21st century. Count how many numbers are on the sidewall. The UK law requires the load rating to be equal to or higher than the tyre that is recommended by the vehicle manufacturer for the tyre size that is fitted. F2 - Tractor front tyres commonly with a 3-rib pattern, but also available in 4 or 5 rib version, that are used on the front axle of two-wheel-drive tractors and on some agricultural implements. R4 - The R4 pattern is also known as an industrial wide lug or ATU (all Traction Utility) tread. Tyre Inner Tubes, Quad Bike Tyres, ATV Tyres, Turf Tyres, Wheelbarrow Tyres, Ride On Lawn Mower Tyres, Golf Buggy Tyres, Sack Truck Tyres : TYRE SIZES EXPLAINED - Golf Buggy Tyres & Wheels Implement & Wheelbarrow Tyres Trailer Tyres & Wheels Mobility Scooter Grey Tyres Go Kart Tyres Kite Buggy Tyres & Beach Wheels Inner Tubes For All Applications Linseal OKO Tyre Sealant Stops … Whether it is from natural wear and tear or from accidental damage, you need to know the size of your tires to replace them. So a 16.9-30 would become 420/85R30 for modern radial tractor tyres. With these older markings it is generally assumed that the profile percentage is 85%. Technical Terms Explained Width (Section Width) This is how wide the tyre is if you were looking at the tyres tread face on. 30″ Rows use sizes 420/80R46 & 480/80R42; 38″ Rows use sizes 520/85R38; Broad Acre or Flotation uses sizes 650/65R38 & 800/65R32. Most modern radial tractor tyres are marked up with metric sizes such as 420/85R28, 460/70R26, 540/65R38. Older crossply tractor tyres are still used in slower moving machinery such as lawnmowers, forklifts and older classic tractors and buses. These alternate width/profile options work to ensure your tyres overall height remains constant (within tolerances) to ensure your tractors gearing ratios or transmission won't be affected by the change if you have a 4WD machine. Learn more. Determine the size if there are two numbers. In this example our tire will be roughly 15" inches tall. The letters and numbers after that tell us the maximum speed that the tractor tyre is designed to run at, and again the table below show you what the varying letters mean. The number of plies is always stamped on the side of the tire. tire sizes (Tire size) Tire code or Tyre code – Automobile tires are described by an alphanumeric code, which is generally molded into the sidewall of the tire. The numbers will be separated by a hyphen or a slash. For each tyre size you input our tyre calculator suggests multiple tyre sizes that are with in one inch bigger and smaller of the entered tyre size. This guide aims to help you understand your tractor tyre's size, tread pattern, load carrying capacity and maximum speed. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. What Does the 96Y Represent in the Following Tire Size: 245/40R19 96Y? Turf & grass tyres for ride on lawn mowers and garden tractors. If there are 2 numbers, they tell you the width of the tyre and then the diameter of the rim (both in inches). You can replace tractor tyres with different size as long as the rim is the correct size. there may be 2 or 3 numbers, separated by a / or -. She has a bachelor's degree in creative writing and environmental studies. Most classic tractors use the older crossply type tractor tyres. That means if you want to find the modern Radial equivalent you would convert the width given in inches into millimetres, assume the 85% profile, and keep the rim diameter the same. The last number is still the rim size. Traction Implement - Like an R1 or R4 tractor tyre pattern but designed for use on the drive wheels of agricultural and industrial implements. Let’s use 205/55 R16 as an example. We have tyre options to suit the smaller, lower horsepower tractors right the way up to the larger, high-powered tractors. “We stock Agrimax 60, 65, 70, and 85 series tyres. The most common tyre size in the UK is 205/55R16 but there are many variations so it’s important to check your existing tyre or to check your vehicle handbook to ensure the right tyre size has been installed. When it comes to tyre tread, most tractors feature a herringbone design tread whether radial or bias-ply tyres. It's the size of the rims that are the important thing when replacing them. R3 - This is the non-marking grassland turf pattern often made of diamond shaped block lugs that are shallow and non-aggressive so as not to leave a mark on the ground. You may have noticed that tractor tires are marked differently from the tires on your car or truck. Lawn Tractors are very rarely over-loaded, but a tire with a higher carrying capacity is also more resistant to punctures because the casing of the tire is thicker and stronger. Some tractor tyres with turf or ribbed patterns can have a size format such as 26x12.00-12, 31X10.00-20. 2 size(s) available View Tyre Details Standard, Radial, and Metric Tractor Tire Sizes. As a long standing supplier of Michelin Tractor tyres we have access to all Michelin Agricultural Tyres at the best prices. Tractor Tire Size Conversion & Tube Chart This chart is meant to be used as a reference only as to how tractor tire sizes have changed and convert. There are a series of numbers on it. Speedy next-working-day delivery and expert advice. Count how many numbers are on the sidewall. It is sometimes abreviated to just P.R. Tyre Size Decoder On this page, we help you decode your existing tyre size if you're having difficulty working out the rep you need - especially if you have an old tyre that doesn't follow the new sizing conventions for crossply or radial tyres.