Modern Tire Dealer

JUN 2019

Magazine for the professional tire industry

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M T D J u n e 2 0 1 9 54 Keep in mind when you start with an R-1W you can run the tires for quite some time and with the right amount of tread removal, you will then have your R-1. DAVE PAULK, manager of field technical services, BKT USA Inc.: Before the R-1W was introduced to the U.S., there was an R-1 and R-2. e R-1 was designed for general farming, while the R-2 was designed for extremely wet conditions such as with rice and sugar cane. e R-1W was originally designed as a fit between the R-1 and the R-2. e R-1W has approximately 20% deeper tread than an R-1 and 20% less tread than the R-2. With today's tire and compounding technology for radials, the R-1W is used where both the R-1 and R-2 were used with bias tires. e R-1 is designed for general farming in dry dirt as the tread depth is not as deep. e R-1W is also used in this application and has a 20% deeper tread, providing a longer tire life. is is important because farms are now scattered and tractors must be transported on highways to move between farms. R-2's were designed for muddy conditions and are still the tires of choice for crop such as rice, cane, and vegetables in irrigated soil. In some of these conditions, the R-1W is used where the dirt is wet, but not muddy. e R-2 does not do well when it is driven on the road because the lugs are deep, bend easily, and can develop uneven tread wear. e R-1W is a good all-around tire to use for general farming practices. JAMES CROUCH, national agriculture product manager, Alliance Tire Americas Inc.:: R-1W tires have taken the farm tire market by storm, and it's no mystery why. Just a few years ago, these extra-deep-lug farm tires were super-premium offerings, reserved for the biggest tractors and the largest farmers. Now most of the top tire manufacturers have R-1W tires, prices have come down, and the deep-lug technology is within reach of most farmers. When it comes to extra traction, heavy loads, and lots of torque, R-1W tires are the way to go. ink of an R-1W as a classic R-1 direc- tional tractor lug tire plus 20% more depth. The "W" in "R-1W" actually stands for "wet," to indicate its increase in wet traction versus a traditional R-1. at's perfect for midwestern or southern soils — gumbo soils or sandy loam where you want more bite. at R-1W lug is going to grab more earth and propel the tractor forward more effectively, while the area between the lugs keeps the tire on the surface of the soil. And nowadays, with fields spread farther apart, it's nice to have some more rubber to extend tire life on equipment that spends more time on the road. Beyond the extra depth, today's R-1W tires also have better compounding than ever, which is great for longevity. at said, sometimes all a farmer needs is a good, classic R-1. Say you've got a small chore tractor in your equipment yard — 70 horsepower, loader on the front or a box scraper on the back — that doesn't even leave the farm. You don't need an extra-deep lug tearing up the ground for that. And if you've got a tractor that's just pulling a tedder and a baler around a hay field, you don't need the added expense of an R-1W. Basically, you're not going to wear out that R-1 tire on a haying operation, so why pay more for extra tread you're not going to use? Another situation where it may be better to stick with R-1 tread rather than going to R-1W is on a high-clearance sprayer. e deeper R-1W lugs on a 380/90R46 tire will squirm more than the shallower ones on an R-1 of the same size. Obviously, that's a disadvantage when you're trying to run straight between the rows or steer a few thousand pounds of spray solution down the road. e R-1 will give you a more stable ride and build up less heat on the road between fields. DAVID GRADEN: operational agriculture market manager, Michelin North America Inc.: R-1 is a standard tread and typically used in applications that demand very little from the tire. For example, you may find an R-1 lug tire in dry farming or on general purpose chore tractors. And in some applications, conditions need to be ideal. R-1W is typically considered a wet trac- tion tire for use in softer soils. This lug design can have larger voids between lugs and deeper lugs than an R-1. ese tires are also considered a deep tread or premium option for most tire manufacturers. Here at Michelin AG, we only make R-1W tires. When it comes to putting more horse- power to the ground and improving traction in your less than ideal everyday conditions, let's be honest. ink spring planting. No one has the luxury of working in ideal conditions. e standard R-1 just isn't enough. BRADLEY HARRIS, manager, global agricultural field engineering, Firestone Ag Division, Bridgestone Americas Tire Operations LLC: When choosing to place radial traction tires on a tractor, one of the most common questions we hear is whether R-1 or R-1W tires are best. When looking at the price difference between the two tire types, farmers wonder what they get for the higher price of an R-1W. To help farmers make the most informed decision, here are some facts and performance benefits for R-1 and R-1W tires. Ken Brodbeck, vice presi- dent of technology for Precision Inflation LLC, was asked when should an ag tire user select an R-1 or R-1W? Here is what he considers the compara- tive benefits of each. R-1W over R-1: • 20% more life, especially if the machine does a signifi- cant amount of road travel. • better tractor resale value. • minor loss in traction over R-1 on firm, dry soils. • minor traction advantage in wet muddy conditions. • R-1W will become an R-1 tread after roughly 1,000 hours. R-1 over R-1W: • R-1 bias and radial are usually the lowest cost tires for low hour use tractors. • R-1 treads are the favorite for most tractor pullers due to better grip on hard pull- ing tracks. • Think of a high horse power tractor puller using a slick with ¼" high tread bars. They win on firm tracks! • Older lower horsepower sizes may only come in R-1 tread. "Soil compaction is di- rectly related to tire pres- sure," says Brodbeck. "R-1 and R-1W use the same load/pressure table. To m i n i m i z e c o m p a c t i o n , know your axle load and set the tires to the mini- mum pressure required by the tire manufacturer and check weekly. If you do not check tire pressures regularly, you should run 2 to 3 psi higher than the minimum to protect your tire investment." R-1 or R-1W? Here's a quick checklist of the pros A G T i r e T a l k

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