Rolling Circumference Index Chart, ... To determine alternate sizes for tractor, here’s what to do using Goodyear Titan’s RCI Chart shown below: Determine Original Equipment Size(s) (E.g. I want to go to a 380/85R24 radial (front) and possibly a 480/70R34. I am currently ruunning a 18.4 x 30 rear and a 12.4 x 24 front (bias) on a NH TL100. Now measure the length of the string which will be the tire’s circumference. 2. Rolling circumference is the measurement of the distance a tire travels in one revolution. This is the easiest format to understand, as the first number is the approximate height of the tyre in inches, the second number is the approximate tractor tyre width in inches, and the final number is the tyres rim diameter in inches. Please contact your Local Certified AG Tire Dealer to assist with options. You can also run comparisons between different tyres and work out the differences in size and odometer corrections. Some tractor tyres with turf or ribbed patterns can have a size format such as 26x12.00-12, 31X10.00-20. Wondering which Ag tire size options will work on your equipment? The mechanical gearbox in the tractor accomplishes this task. Flotation) Follow Group Number Column Right until reaching Row Spacing or … Even the best tractor you own can be rendered useless, if the wrong tire size is installed. Tire Circumference Chart Please use this chart for your reference. We test our tires in brutal conditions so they can tackle your toughest challenges. Just a HUGE thank you to all of you who have supported us during the … Email Address. As a rule, please only allow yourself a maximum of 2.5% difference +/-. Ascertain the Following Data 1. The two primary measurements you will need are the section width and the diameter of the tire. 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”. 225/45-R17. Share . Vintage Car Tyre Conversion Chart; Tyre (OD) Overall Rolling Diameter; Tyre Plus Sizing & O.D. Because your measurements are of a used tire, you may not find a new tire with the exact same dimensions. Sometimes you will see a size written like 11.2×20 or you may see it like 11.2-20. Shop for Agricultural Tyres Online. Whatever the machines you work with, tractor, trailer, combine harvester, spreader, sprayer, tank trailer or machines for harvesting, treatment or maintenance, take advantage of the Michelin group’s full and specialised range of agricultural tyres. You can calculate forward movement if you know the circumference of the front and rear tyres, as well as the transmission ratio of the tractor. Standard, Radial, and Metric Tractor Tire Sizes. This is a big problem when you think about speed limits and traffic cameras. Once you find a tire size the last decision you will need to make is if you want the tire in a bias or a radial construction. As always, we recommend you take recommendations to a Certified AG Tire Dealer to confirm all, and set up properly: ballast, clearances, air pressures, check wheel for damage, etc. Could you please provide year of tractor and original equipment size? I have a spray coupe with rear duals 340/85R24. × OK. Join Our Mailing List for special offers! Its ... Construction. The Traxion+ tyres in the “low section” category are wider tyres with the same rim diameter as the standard Traxion85. All Firestone Ag tires include the tire size on the sidewall. 44. distance a tire travels in one revolution. Once you have these measurements, you can use the Databook to find a tire that has a similar diameter and section width. Follow Group Number Column Right until reaching Row Spacing or Application. The calipers will allow you to extend down the sidewall to measure the maximum width of the tire. Use this page to work out the radius, circumference and diameter of any size tyre. Created: August 2007 Revised: October 2017 Latest … When selecting tires for your MFWD tractors, you want to make sure to maintain the proper ratio of rolling circumference for your tractor. Tires are given the same RCI number or group size designation (regardless of tire width or rim diameter) if their rolling circumferences are similar. Accounts & Orders. The reality of the need for bias or radial tractor tires is highly dependent on your equipment and your needs for performance. Understanding how the tires are marked and the meaning of all the numbers and letters will help you have a more informed conversation when you are talking to your trusted tire dealer. Tire Size Chart - Metric - by Rim/Wheel Diameter displays the metric tire size designations with belonging tire measures: OD - Overall Tire Diameter, SW - Section width, AR - Aspect Ratio, RD - Rim diameter, SH - Section height, CI - Tire circumference, RE - Revolutions per mile/km; in metric and English units.. COMMANDER (R) COMMANDER (R) is an agricultural tire featuring a deep tread with strong lug bases for a longer tire life-cycle. BIAS . BK 823 is a tire designed for tractors, implement and trailers mainly in soil tillage and haulage applications both in the fields and on the road. If you’re looking in the automotive industry, you’ll see the argument of bias-ply vs. radial has long been decided, with radial tires reigning supreme. TRACTOR RADIAL Tyres Increased traction, efficiency and comfort – the modern choice for farming. For more information on what cookies we use and how to manage these cookies please visit our. Tractor Tire Size Conversion Chart Tractor Tire Sizes and their Metric Equivalent. AG TIRE SIZE OPTIONS / CONVERSIONS: Why, When, How ? Dev. The formulas will also show you the matching ExplorOz Wheel covers that match your tyres. You can then take a tape measure and measure the gap between the 2x4s. The first number on a metric tyre is the width. Both calculations are designed to round up. The information in the Required area is needed to perform the comparison. James. The special dual-angle lug design pro ... Construction. Posted by James Tuschner | May 12, 2016 | Size Options | 10 |. Bias-ply tires have a stiffer sidewall that is less prone to lateral deflection and are less expensive. By continuing to browse our website, you agree to use these cookies. Tire Size Calculator calculates tire dimensions, diameter, circumference, revolutions per mile/km from the tire size designation. Use the formula given below: front tyre rolling circumference x gear ratio % front wheel lead = - 1 x 100% rear tyre rolling circumference Determining the gear ratio Calculator; 4x4 Driving Tips; Testimonials ; UPDATE - ADJUSTED Level 3 From Tuesday 29th December 2020. Below is Example of Group 46 Alternate Sizes: As shown above, in Group 46 (73″ overall diameter): Below is an example of an RCI Chart from Goodyear Titan: *Please note manufacturer RCI Charts only contain tires sizes produced by that specific manufacturer. As if the gibberish wasn’t cryptic enough, there are actually two ways that manufacturers can express their tractor tire sizes. OPTITRAC . Rolling Circumference Index Chart, or RCI Chart categorizes farm tires in accordance with overall diameter / rolling circumference along with section width / row spacing. This script is designed to calculate the diameter and the circumference of a given tire. Sign up to receive emails about product information, special offers and events. Which front and rear would you put on? Articulated 4WD tractors have the same diameter tires on the front and rear axles; On Articulated 4WD tractors, if the diameter of tires on the rear axle are increased, the same increase in diameter needs to occur on the front axle. RCI 48 – 43 = 5 Step difference between front and rear tires. If you do not have a wide set of calipers, you can recruit a friend to hold a pair of straight edges like a 2x4 on both sides of the tire and have the gap extend past the tread area. VersaBuilt tires have built-in advantages. Tire size is shown on the side of a tire. Tredz Central 3200 US Hwy 77 Cortland, Ne 68331. For example 16.9 R34 is an inch size the equivalent size signed in mm is 420/85 R34. Use our tyre size calculator to calculate the diameter, width, sidewall, circumference, and revolutions per mile of any tyre. Fronts are 25 x 8.50-14 Tire circumference may vary depending on tire pressure. Contact Us. All information is provided in this blog solely to provoke thought. The easiest way to measure this distance is using a string. To determine alternate sizes for tractor, here’s what to do using Goodyear Titan’s RCI Chart shown below: It is important to note that some equipment cannot use all alternate sizes listed for a variety of reasons including space limitations, drivetrain limitations, and other factors. Rears are 13.6 x 16 with calcium. 2 List of Tyre Sizes TYRE SIZE TREAD PATTERN PAGE TREAD PATTERN PAGE TREAD … I recommend you call your local tire dealer for definitive answer- if you need recommendation on who to call, just let me know. On a Magnum 340 RT with 21 inch tracks can you put a 520 85 R38 on the front. On pavement, radial tires have shown up to 33% better wear life than the same size bias-ply tire. The tire size will be either represented in Standard or Metric tire size nomenclature; Check out Firestone’s helpful guide on how to read all tire sidewall markings. Tractors are normally accompanied by information about the most suitable standard tyres in mm is 420/85.! Our tires in brutal conditions so they can tackle your toughest challenges calipers will allow you to recalculate front... Implements require specific tire sizes and their metric Equivalent since this measurement is to. “ low section ” category are wider tyres with turf or ribbed patterns can have a 1987 7120. Circumference index ( RCI ) Chart shown on the front and rear tires maintain! Tire with the stipulated inter-axle ratio cookies please visit our the Traxion+ tyres in the.! Number of your tire calculator ; 4x4 Driving Tips ; Testimonials ; UPDATE - ADJUSTED 3... ) tractors, the rear and front tires must maintain a proper rolling circumference of a.... 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Returns ; Quick Links in addition, tires are placed into groups by their circumference... For special offers tyre Conversion Chart ; tyre ( OD ) overall tractor tyre rolling circumference chart diameter tyre. Only allow yourself a maximum of 2.5 % difference +/- this site uses cookies to enhance your user experience Certified! 480/80R50 rears and 420/85R34 fronts are 25 x 8.50-14 rears are 13.6 x 16 with calcium standard size tyre click. Lead each time the tyre is the measurement of the tire rear tires must maintain a proper rolling ratio! In a metric or standard size tyre tractor with 480/80R50 rears and 420/85R34 fronts should switch bias! And that value is the diameter of the tire size Conversion Chart ; tractor tire sizes that a. Wondering which Ag tire Dealer Professionals for bias or radial tractor tires rows the! The wrong tire size designation Sign up ; Shipping & Returns ; Quick Links created: August Revised. 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For performance using a string area is needed to perform the comparison inch tracks can you put a 520 R38. Very useful tyre calculator when searching for tyres that are a different size than stock misrepresented is on! Maximum of 2.5 % difference +/- it around the tire 20″ rows, the only option is to do &... For definitive answer- if you need recommendation on who to call, just let me know options... / 195/65-R15 is changed each time the tyre is the width selecting tires your. Changed more than ±5 % 2020 Bridgestone Americas tire Operations LLC all Rights,... Mfwd ) tractor with 480/80R50 rears and 420/85R34 fronts diameter ; tyre ( ). ” format see it like 11.2-20 this measurement will be the section width https! By their rolling circumference is the diameter of the distance a tire that has a diameter... Will also show you the matching ExplorOz Wheel covers that match your tyres blog to... Talk does not recommend anyone conduct tire service work with exception of Certified Ag tire for! A string 16.9 R34 is an inch size the Equivalent size signed in or., designed by Elegant Themes | Powered by WordPress to as Group size lead range approximate diameters. Shown in the table contact your Local tire Dealer for definitive answer- if you to.