a/t tiers

[Ryan S.]

Anyone have expireince with Cooper Discovery A/T3, Hankook Dynapro A/tm or General Grabber AT2 tiers? how are thay in the snow and rain?

 

[miesk5]

yo Ryan,

Here is some user Review info

Hankook Dynapro

https://www.tirerack.com/tires/tires.jsp?tireMake=Hankook&tireModel=Dynapro+HT+RH12&partnum=375SR5RH12OWL&vehicleSearch=true&fromCompare1=yes&autoMake=Ford&autoYear=1989&autoModel=Bronco&autoModClar=&tab=Reviews

General Grabber HTS

https://www.tirerack.com/tires/tires.jsp?tireMake=General&tireModel=Grabber+HTS&partnum=375TR5GRHTSOWLV2&vehicleSearch=true&fromCompare1=yes&autoMake=Ford&autoYear=1989&autoModel=Bronco&autoModClar=

Cooper Discovery A/T3

http://www.1010tires.com/Tires/Reviews/Cooper/DISCOVERER+A-T3

I would Google for more Reveiews fir each,

GL!

btw, Always ensure tire "Model" is still in production;

To avoiud damage to Xfer case and for driveability etc.

and for posterity;

Tire Circumference Differences; "...The ability of four-wheel drive and all-wheel drive vehicles to divide the engine's horsepower between its four tires is especially useful on loose or slippery surfaces such as sand and dirt, as well as on wet, icy or snow-covered roads. However it's important to remember that in order to transfer this extra power, the four-wheel drive and all-wheel drive vehicle's driveline mechanically connects the tires so they work in unison. Four-wheel drive and all-wheel drive vehicles are equipped with additional differentials and/or viscous couplings that are designed to allow momentary differences in wheel speeds when the vehicle turns a corner or temporarily spins a tire. However, if the differentials or viscous couplings are forced to operate 100% of the time because of mismatched tires, they will experience excessive heat and unwarranted wear until they fail. This necessitates that four-wheel drive and all-wheel drive vehicles use tires that are very closely matched. This is because different diameter tires roll a different number of times each mile as a result of the variations in their circumferences. Tire diameter variations can be caused by accidentally using different sized tires, tires with different tread designs, tires made by different manufacturers, different inflation pressures or even tires worn to different tread depths. As an example of different tire diameters resulting from tires worn to different tread depths, we'll compare two 225/45R17-sized tires, a new tire with its original tread depth of 10/32-inch and a second tire worn to 8/32-inch of remaining tread depth. The new 225/45R17-sized tire has a calculated diameter of 24.97", a circumference of 78.44" and will roll 835 times each mile. The same tire worn to 8/32-inch of remaining tread depth is calculated to be 1/8" shorter with a diameter of 24.84", have a circumference of 78.04" and will roll 839 times per mile. While the difference of 1/8" in overall diameter doesn't seem excessive, the resulting 4 revolutions per mile difference can place a continuous strain on the tires and vehicle's driveline. Obviously, the greater the difference in the tires' circumferences, the greater the resulting strain. This makes maintaining the vehicle manufacturer's recommended tire inflation pressures and using "matched" tires on all wheel positions necessary procedures to reduce strain on the vehicle's driveline. Using "matched" tires means all four tires are the same brand, design and tread depth. Mixing tire brands, tread designs and tread depths may cause components in the vehicle's driveline to fail. Mismatched tires or using improper inflation pressures for all-wheel drive and four-wheel drive vehicles can also result in immediate drivability problems. Some Control Trac equipped vehicles in 4Auto mode may exhibit a shutter on acceleration and/or a noise from the front driveline and transfer case while driving. Some all-wheel drive and four-wheel drive vehicles may exhibit axle windup or binding while driving. Some four-wheel drive vehicles (manual or electronic shift) with a two-wheel drive mode may refuse to shift "on the fly" into 4x4 Auto or 4x4 High at highway speeds..." read more, esp. Matching Tires By Shaving Them to Maintain Equivalent Tire Tread; miesk5 Note, The tires must match in size to ¼” (.250).

Source: by tirerack.com

Tire Circumference Differences; "...Uneven tire and rim sizes on a vehicle will result in inaccurate wheel speed information being transmitted to the ABS Control Unit. This faulty information will cause ABS Lock-Out or erratic operation..." miesk5 Note, The tires must match in size to ¼” (.250).

Source: by priorreman.com

Tire Circumference Differences; ensure that the tires you decide on buying are not discontinued (not now manufactured by the tire maker). Ask around - don't rely on verbals by just one dealer. Because; A tire slasher messed my plans up $ wise in JAN when he slashed two 32x11.50 Daytons; they were just a year old at the time. I found that Dayton stopped making em (in 32s) right after I bought them and None are avail anywhere....; so I ended up w/ two Michelin LTX® M/S 32x11.50R15 in an emergency buy that late Saturday afternoon; guess what? right, they stopped mfg em too! Prob is finding tires in the future to replace the Daytons that have an actual inflated diameter close enuf (see below) to whatever is in in-place so that we can do the std rotation & don't rip up the Xfer case, etc. This is by Ford for its Xfer cases, esp the 1356 in Four Wheel Drive (4X4) General Information, Operation & Troubleshooting TSB 92-1-8 for 92 & Prior Year Bronco, F Series & Ranger; Includes Electric Shift On The Fly (ESOF) Troubleshooting after 92 & Hub Operation ; "...You will recall that at the beginning of this section, we mentioned that we had made sure that all four tires on our truck were the same size, were worn the same amount, were inflated to the specified pressure and were subjected to reasonable loading. Avoiding driveline windup was the reason for this. Figure 18A shows that tires of even slightly different size roll different distances every revolution. Figure 18B shows that the same effect is true for tires that are the same size but inflated or loaded differently. Operating a 4 x 4 in 4WD with tires of different size or inflation will produce driveline windup, even when driving straight ahead! If the vehicle is being driven in 4WD on dry, hard pavement, the driver will notice drag and may experience the hop, skip, bounce effect as the front or rear wheels release the windup..." If you want to buy on-line, after picking out the combo you need, go to a local privately-owned tire shop and see if they'll beat/match total installed cost w/free life-time rotations and anything else you can get (road hazard...etc.) miesk5 Note, The tires must match in size to ¼” (.250).

Source: by miesk5

http://www.tirerack.com/tires/tirete...currentpage=51

When it comes to determining the age of a tire, it is easy to identify when a tire was manufactured by reading its Tire Identification Number (often referred to as the tire’s serial number). Unlike vehicle identification numbers (VINs) and the serial numbers used on many other consumer goods (which identify one specific item), Tire Identification Numbers are really batch codes that identify the week and year the tire was produced.

The U.S. Department of Transportation (DOT) National Highway Traffic Safety Administration (NHTSA) requires that Tire Identification Numbers be a combination of the letters DOT, followed by ten, eleven or twelve letters and/or numbers that identify the manufacturing location, tire size and manufacturer's code, along with the week and year the tire was manufactured.

Tires Manufactured Since 2000

Since 2000, the week and year the tire was produced has been provided by the last four digits of the Tire Identification Number with the 2 digits being used to identify the week immediately preceding the 2 digits used to identify the year.

Example of a tire manufactured since 2000 with the current Tire Identification Number format:

http://www.tirerack.com/images/tires/tiretech/determining_age/Post_2000_Full_Dot.jpg

In the example above:

DOT U2LL LMLR 5107

51 Manufactured during the 51st week of the year

07 Manufactured during 2007

While the entire Tire Identification Number is required to be branded onto one sidewall of every tire, current regulations also require that DOT and the first digits of the Tire Identification Number must also be branded onto the opposite sidewall. Therefore, it is possible to see a Tire Identification Number that appears incomplete and requires looking at the tire’s other sidewall to find the entire Tire Identification Number

http://www.tirerack.com/images/tires/tiretech/determining_age/Post_2000_Part_Dot.jpg

The use of a partial Tire Identification Number on the one sidewall (shown above) reduces the risk of injury to the mold technician that would have to install the weekly date code on the top sidewall portion of a hot tire mold.

Tires Manufactured Before 2000

The Tire Identification Number for tires produced prior to 2000 was based on the assumption that tires would not be in service for ten years. While they were required to provide the same information as today’s tires, the week and year the tire was produced was contained in the last three digits. The 2 digits used to identify the week a tire was manufactured immediately preceded a single digit used to identify the year.

Example of a tire manufactured before 2000 with the earlier Tire Identification Number format:

http://www.tirerack.com/images/tires/tiretech/determining_age/Pre_2000_Dot.jpg

DOT EJ8J DFM 408

40 Manufactured during the 40th week of the year

8 Manufactured during the 8th year of the decade

While the previous Tire Identification Number format identified that a tire was built in the 8th year of a decade, there was no universal identifier that confirmed which decade (tires produced in the 1990s may have a small triangle following the Tire Identification Number to identify the decade).

And finally, hold on to your sales receipt. Most tire manufacturer's warranties cover their tires for four years from the date of purchase or five years from the week the tires were manufactured. So if you purchase new tires that were manufactured exactly two years ago they will be covered for a total of six years (four years from the date of purchase) as long as you have your receipt. If you lose your receipt, your tires' warranty coverage will end five years from the week the tire was produced (resulting in the tire manufacturer's warranty coverage ending only three years from the date of purchase in this example).