Fast pig Posted October 12, 2014 Report Share Posted October 12, 2014 I put michelin pilot super sports (factory size) on rear of my 13 which has no other modifications at all and soon thereafter I noticed it's all over the place, wondering really bad. I notice it at all speeds but gets highly noticable by 60-70 mph. It's completely out of control at any higher speeds. I was worried an adjustable dampener wasn't functioning or something, but when I had local SVT ford garage look at it they said everything was acting normal and said I had directional tires on the front and different ones on the back. Are they blowing me off? Has anybody ever experienced or heard about this? Link to comment Share on other sites More sharing options...
Norton Posted October 12, 2014 Report Share Posted October 12, 2014 I put michelin pilot super sports (factory size) on rear of my 13 which has no other modifications at all and soon thereafter I noticed it's all over the place, wondering really bad. I notice it at all speeds but gets highly noticable by 60-70 mph. It's completely out of control at any higher speeds. I was worried an adjustable dampener wasn't functioning or something, but when I had local SVT ford garage look at it they said everything was acting normal and said I had directional tires on the front and different ones on the back. Are they blowing me off? Has anybody ever experienced or heard about this? I have not experienced it, since I converted to MPSS on all four corners, and I know lots of folks mix & match tires (seemingly) with no problems. According to Tire Rack, however... "As a general rule, tires should not be mixed on any vehicle unless specified as acceptable by the tire or vehicle manufacturer. Drivers should avoid mixing tires with different tread patterns, internal constructions or sizes, and use identical tires on all of their vehicle's wheel positions in order to maintain the best control and stability. Additionally, drivers should never mix winter tires with all-season/summer tires, or mix run-flat tires with non-run-flat tires. This is one of the reasons that it is desirable to have all of a vehicle's tires wear out at the same time. It's confirmation that the vehicle design, driving conditions and maintenance practices worked in unison to equalize tire wear and performance. It also lets drivers know they got their money's worth out of the current tires and allows them to choose a set of replacements that will either maintain the Original Equipment (O.E.) tires' capabilities, or help tune the vehicle's qualities to even better suit their needs. Unfortunately wearing out all tires at the same time isn't always possible. Sometimes vehicle design, the use of differently sized tires on front and rear axles, insufficient maintenance and/or driving conditions conspire to prevent it from happening. If a vehicle's tires don't all wear out at the same time, drivers are typically forced to decide whether they should purchase a new set of tires (forfeiting the worth of the two tires not fully worn out) or just a pair of replacements. While purchasing a new set of tires is best because it will maintain the handling balance engineered into the vehicle while restoring poor weather traction, it is also more expensive. And while purchasing a pair of replacement tires reduces immediate expense, it brings with it the options of choosing exact, equivalent or alternative tires. Of the three, the best choice is to select the exact tire currently on the vehicle. This assures that the tire's physical dimensions, internal construction, tread design and tread compound are equal to the tires being replaced. The second option is to choose equivalent tires from the same tire performance category that share the same speed rating, handling and traction characteristics of the original tires. While this isn't as desirable as selecting the exact tire currently on the vehicle, it can become necessary when the original tires are no longer available. The third option, choosing alternative tires, should only be considered as a temporary solution in an emergency situation. Using alternative tires from different tire performance categories, with alternate sizes or different speed ratings can unbalance the vehicle's handling in poor weather or when pushed to the limit in an emergency. Because tires play such an important role in every vehicle's comfort qualities and handling capabilities, it is always best to drive on tires that are identical in every detail, including tire brand, model, size and remaining tread depth. Anything else involves some type of compromise." Link to comment Share on other sites More sharing options...
freakshow12 Posted October 13, 2014 Report Share Posted October 13, 2014 I dunno. I have been running drag radials on every car I've had since the late 90s. Sack up and drive the thing. I have noticed a few boards I've been on lately are a bunch of girly boys worrying about every little thing! Just nut up and drive it like you stole it... Lol Link to comment Share on other sites More sharing options...
Fast pig Posted October 13, 2014 Author Report Share Posted October 13, 2014 You shouldn't speak up so boldly when you don't know who you're talking to. Have you ever done hundred mile an hour half mile wheelies on a motorcycle? Link to comment Share on other sites More sharing options...
Torched10 Posted October 13, 2014 Report Share Posted October 13, 2014 Hi would be concerned with emergency handling. The traction will be different with mpss so if you get into a full 4 wheel brake situation the car may spin on you. Sorry for the immature response. Very unusual for this forum Link to comment Share on other sites More sharing options...
Fast pig Posted October 13, 2014 Author Report Share Posted October 13, 2014 It really is bad, going across the yellow lines make it wobble pretty bad, i'm going to have to buy a new pair of tires to see Link to comment Share on other sites More sharing options...
JeffJ Posted October 13, 2014 Report Share Posted October 13, 2014 It really is bad, going across the yellow lines make it wobble pretty bad, i'm going to have to buy a new pair of tires to see I'm sure you have, but have you double checked the lugs? It sounds like something seriously wrong not associated with the tires to me. Link to comment Share on other sites More sharing options...
Doug_GT350 Posted October 13, 2014 Report Share Posted October 13, 2014 I'm sure you have, but have you double checked the lugs? It sounds like something seriously wrong not associated with the tires to me. I agree with Jeff.... could you borrow a pair from someone in your area just to see if it's the tires.... this just sounds way too weird. Link to comment Share on other sites More sharing options...
Torched10 Posted October 13, 2014 Report Share Posted October 13, 2014 I'd bet if you go back to where you bought the pilots they'd mount 2 tires as a test. But it sure sounds like something us loose Link to comment Share on other sites More sharing options...
Torched10 Posted October 13, 2014 Report Share Posted October 13, 2014 I'd bet if you go back to where you bought the pilots they'd mount 2 tires as a test. But it sure sounds like something us loose Link to comment Share on other sites More sharing options...
Doug_GT350 Posted October 14, 2014 Report Share Posted October 14, 2014 I've heard stories of where the retainer clip (that keeps the rotors on during assembly) has gotten in the way and caused the wheel to wobble.... as stupid as it sounds, it's the little things that go overlooked and get missed. Again like Jeff said jack it up check the lugs and look on the inside bead.... just maybe one of them didn't seat itself correctly against the bead. Keep us informed as to the outcome I'd like to know what it was. Link to comment Share on other sites More sharing options...
03reptile Posted October 14, 2014 Report Share Posted October 14, 2014 Don't know what your exact problem is but I do know it is not safe to mount tires with different tread patterns/design. Each pattern has it's break-away limit depending on the tread design. Mixing them courts disaster. Therefore it is not safe.Period. Link to comment Share on other sites More sharing options...
venem07 Posted October 14, 2014 Report Share Posted October 14, 2014 i run nitto nto1 on the back and stock tires up front with no problems at all Link to comment Share on other sites More sharing options...
cobra 07 Posted October 15, 2014 Report Share Posted October 15, 2014 I had a like problem with my 14. jumping between lane markers without any warning and my dealer - Landmark Ford @ Tigard Or- refused to due anything. Their excuse - all mustang's with electric power steering do that because of the rutted roads. The car still has low mileage original GY's on it. I ended up going to a local alignment shop for a check out and it was out of alignment and after spending $125 and a lot better and semi-safe @120 mph. I think my tires are bad like maybe wobbling due to the cords within Link to comment Share on other sites More sharing options...
Fast pig Posted October 24, 2014 Author Report Share Posted October 24, 2014 Sure enough it's all better, the guy said today I would be surprised and he was right. Link to comment Share on other sites More sharing options...
JeffJ Posted October 24, 2014 Report Share Posted October 24, 2014 Sure enough it's all better, the guy said today I would be surprised and he was right. So what was the problem? You changed tires? Link to comment Share on other sites More sharing options...
Fast pig Posted October 24, 2014 Author Report Share Posted October 24, 2014 Yes, maching michelins pilot super sports Link to comment Share on other sites More sharing options...
Torched10 Posted October 25, 2014 Report Share Posted October 25, 2014 Did you match k1s on front and back or non k1s.they have different tread designs Link to comment Share on other sites More sharing options...
Fast pig Posted October 25, 2014 Author Report Share Posted October 25, 2014 non k1s which I guess there calling the k2s, these are straightaway cars I wouldn't opt for Less rubber. ? Link to comment Share on other sites More sharing options...
Torched10 Posted October 26, 2014 Report Share Posted October 26, 2014 Did YOu get ,265s in the front Link to comment Share on other sites More sharing options...
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