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The problem with advice is, you may spend more than you need to, the better test is if you did a real world side by side comparison and tell us if the GT was better than the non-GT and why....
 

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Yes Ray, personal experience is the best, but we all know not every product is reviewed by every user the same. My brother and I call reviews Best/Worst, because half the people will say it's the best ...pick one ....tire, helmet, gloves, boots, jacket, rain suit etc they have ever used, and half the people will say it's the worst tire, helmet, gloves, boots, jacket, rain suit, they have ever used. One star or 5 stars, every product gets both ratings. Who do you believe?

One has to start somewhere, and for me the best start is a manufacturer's recommendation, not an anonymous internet reviewers. I dont know how he rides, what modifications he has made, how he takes care of his tire pressures, what his road conditions are like or if he even rides at all or very much. Does he ride 2 up loaded on interstates, in all kinds of weather,, or is he a weekend warrior hitting the same local roads he feels comfortable on, only on sunny 80 degree weekends, never really going anywhere?

The manufacturer designs and builds the product to certain criteria they deem to be safe with regards to expected usage on certain vehicles, and makes recommendations based on that criteria. Start there IMO. If the product doesnt suit you for some reason, then try something else.

I have tried several sets of 4 GTs on my FJR, now I am trying a set of the new 5 GTs as per Michelins recommendation. If the 5 GTs dont suit me, I will return to the 4GTs or maybe something else, gaining personal experience along the way. But I dont expect my experience to be the same as everyone else's. Rarely is.
 
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I take all those user reviews into consideration, as they are likely to tell you it wore funny or skipped out on me or whatever. As for GT's that's up to you if you want to spend the money. Did the FJR come with GT tires on it? Did you compare a non-GT to any of your GT's under the same conditions? Do you take the manufacturer's recommendation to use 36 psi on the front tire pressure? Are there errors in the service manual? Are there better practices than what's recommended? You get what I mean...... gather data from many sources and then make a more informed decision, and don't be afraid to try something new.

Your tires are your preference based on your experience and your riding style, and all reviews are just data points. I tend to discount those who say greatest because it lasted longest, as I don't want that, I want a blend of good grip and reasonable mileage. What anyone might like as a tire, I may not use.
 
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And furthermore there is no specification for "GT". GT is anything Michelin says it is. Is anything Bridgestone says it is. Pirelli says GT is something totally different (Angel ST vs Angel GT).
 
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And furthermore there is no specification for "GT". GT is anything Michelin says it is. Is anything Bridgestone says it is. Pirelli says GT is something totally different (Angel ST vs Angel GT).
There has to be some difference between a Road 5 and a Road 5 GT (or a PR4 and a PR4GT) or else why make two different lines of tires and why recommend one for a particular motorcycle over the other?

It really doesn't matter, what the name is. They could call it a Michelin Striped Ape, and if Michelin said for your 670 pound (1050 pounds 2 up with luggage) 145 hp sport-tourer ridden under normal conditions for this machine we recommend the Michelin Striped Ape, that's what I would be running right now. It just happens Michelin calls it a GT.
 

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There has to be some difference between a Road 5 and a Road 5 GT (or a PR4 and a PR4GT) or else why make two different lines of tires and why recommend one for a particular motorcycle over the other?
Of course there is a difference. But there is also a difference between what Michelin does between R5 and R5GT and what Bridgestone does between T31 and T31 GT. By golly if a fat pig FJR must have "GT" then why is there no standard for what this is?

The load and speed ratings are the same 58W and 73W. So there is no safety issue.

You make a GT variant of a tire so as to reuse all the marketing for the named product. Otherwise you have to explain why one needs a GT5 instead of a Road 5. Consumer expects different tread patterns so you have to go do that too. Or you make a GT variant of an R5, reuse the tread, reuse the marketing.

Why recommend one for a particular motorcycle over the other? Because if you offer Dodge and Plymouth you won't sell twice as many cars but you will sell more than if just Dodge or Plymouth. You will sell more cars if you offer more colors. Rudimentary marketing teaches to never let consumer think two products only differ in flavor or color unless it is only flavor or color.

You make a stiffer tire because some people like a stiffer tire not because "heavy sport tourer requires". But you don't say "you may like this better than the other", you authoritatively weakly state, "This is the tire we recommend for heavy sport tourers."

The difference between an R5 and a PR4 is much greater than the difference between an R5 and R5GT or PR4 and PR4GT. So why is this difference tolerated? Michelin authoritatively (weakly) states only the R5GT is the tire recommended for the FJR. But the PR4GT used to be that tire.

It really doesn't matter, what the name is. They could call it a Michelin Striped Ape, and if Michelin said for your 670 pound (1050 pounds 2 up with luggage) 145 hp sport-tourer ridden under normal conditions for this machine we recommend the Michelin Striped Ape, that's what I would be running right now. It just happens Michelin calls it a GT.
You missed the point. Michelin calls something a GT. Others call something different a GT but both claim GT is what you need. How can this be unless both are correct and both are wrong?

Don't forget, Brawndo Has Electrolytes. It's Got What Plants Crave.
 

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You missed the point. Michelin calls something a GT. Others call something different a GT but both claim GT is what you need. How can this be unless both are correct and both are wrong?
yea I don't think I missed the point at all..... I just don't get anally fixated on names. Like I said, call it what they want. If Michelin or Bridgestone or Pirelli thinks we want a premium tire called a GT, then let them name their premium tires a GT. I don't care if Michelin's GT meet the same exact specs as Bridgestone's GT or Pirelli's GT. Don''t care. All I care about is if it's a good tire for my motorcycle. If Michelin said we recommend a PR4 (with no GT) for the FJR I'd probably be on PR4's (with no GT). If Bridgestone recommended use the T 31 GT I would choose that if I wanted a Bridgestone, and if Pirelli recommended their Angel GT for my motorcycle I would use that, but my first choice would be based on the manufacturer's recommendation.

I figure they are tire engineers, they designed tires, they take into account load ratings, sidewall strength, tread pattern, grip coefficient, water dispersion, longevity, and rubber to silicone content and a dozen other things before making a tire, then use that criteria when recommending a tire for my motorcycle according to the specs on the motorcycle. They certainly know more about tires than I ever will, and I will trust them until proven differently. They haven't failed me yet.
 

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Give it a rest......
That's it... we're taking away your Rotella T!!!

Two years ago I called and asked the difference between the GT rated tire and the same tire non-GT. I left a message and a guy called me back a couple days later. My bigger question was why the non-GT had a higher weight rating (admittedly only one number... but still...).

The answer he gave was that GT tires have a tendency to heat up and stay heated up.... long hours.... lotsa miles... and generally heavier loaded than other street formats. Other street formats tend to warm up and cool down and never put in the time or distance.

Could've been a salesman for all I know, but it made sense to me. Put a set of Angel GT's on the ST1100 and I believe are still on it. (YMMV)

For the FJR, I just received a set of T31 GT's. I went by watching opinions of others and what riders more my style have found useful. The tires I have on it now are old, trash, and need replacing, but I'm going to sort out my suspension issues at the same time so I don't ruin a new set of tires.

But... truly... the only way is to try a bunch and see what works.
 
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Two years ago I called and asked the difference between the GT rated tire and the same tire non-GT. I left a message and a guy called me back a couple days later. My bigger question was why the non-GT had a higher weight rating (admittedly only one number... but still...).

The answer he gave was that GT tires have a tendency to heat up and stay heated up.... long hours.... lotsa miles... and generally heavier loaded than other street formats. Other street formats tend to warm up and cool down and never put in the time or distance.
What "GT" tire has a different load rating than non-GT? None I have seen, but that doesn't mean there isn't one. In stock FJR sizes all are 58W front, 73W rear. W is speed grade, the numbers are load grades.

In the automobile world tires are assigned UTQG (Uniform Tire Quality Guide) ratings for wear, traction, and temperature. Heavier tires tend to have a lower temperature grade. The thicker the tire the more internal friction, the hotter it gets. Motorcycle tires do not have a UTQG.
 

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What "GT" tire has a different load rating than non-GT? None I have seen, but that doesn't mean there isn't one.
I stated in the thread... Pirelli Angel GT. Their A-Spec is supposed to be the touring version and when I was purchasing them I noticed the rear A-Spec was 72W and the non-A-Spec was rated 73W. I called and asked why a lower weight rated tire would be recommended for a heavier application. The response was an ever so slightly different compound hardness and the construction dissipated heat more effectively.

In stock FJR sizes all are 58W front, 73W rear. W is speed grade, the numbers are load grades.
Stated above... it was for a Honda ST1100. Different tire size.

That said, there is no difference between either rating that would put either bike in a parameter that would be, in any way, out of specification for them. I was more intrigued than anything else.
 
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