Michelin Road GT vs non GT

Joined
Jun 17, 2022
Messages
41
Location
Canada
Bike
ST1300
Good day,

I have a dilemma. My front tire appears to be cupping and I’m in search of a new one. The current tires (front and back) are Michelin Road 4 GT. The front is a 120/70 zr18. I cannot find this exact size in a GT anywhere and one distributor says they’re not made anymore. My question is which tire would be more suitable (keeping the rear Michelin Road 4 GT in mind) would be best? The rear tire has plenty of tread life.

Road 6 GT 120/70 R17
Road 6 non GT 120/70 ZR18

Thx

Jamie
 
The front is a 120/70 zr18.

Road 6 GT 120/70 R17
The 17" tire cannot fit on an 18" wheel.

You might try a 110/80 or a 130/70 or a 130/60.

Those sizes will give you fastest to slowest steering response, respectively.
 
Well from experience and losing the same rear tire to damage before end of life - my front has the RP4 GT and I replaced the rear with a Bridgestone battalax t34 GT. It’s barely noticeable in control or cornering but the un matched tires are always on my mind. Tread design will be different. Just finished a 3200 mile run and it seems fine.

Both tires are designed the same and bias. Just different cuts in the tread pattern. I’m sure you’ll get tons of opinion here

Keep that air pressure up otherwise cupping will return.
 
@Larry Fine , I kinda feel like an idiot now. . I’ll look into those options.

@JohnK , I really want to keep the tread patterns the same. I’m also that guy that checks the pressure before every single ride. I still don’t understand how it happened. I am far from an aggressive rider.
 
Wasn't there a thread or an article that indicated that the Road 6 Non GT was the tire for the ST? Though I have seen the GT version sold but no one seems to have any in stock.
Interesting, I thought the GT was for ‘heavier bikes’…
 
you won't notice the difference between the 2 . Michelin states " MICHELIN® 2CT+ Technology™, which has been standard on the rear tire, is now applied to the front tire for better rigidity at lean, and more stability when cornering, especially under strong acceleration or heavy braking, compared to the previous generation. " The tire is beefed up like a "GT"
 
I've run 'mixed' brands before with no issues at all.
Currently I run a BT bias on the rear and BT radial on the front of my ST1100s and my hair has not caught on fire and I have not died in a fiery crash as of yet.
If you always ride at 100% or spend all your time at the track, it might make a little difference.
Bridgestone still makes the GT varieties - which sidewall strengthened to deal with the weight of the STs for they are heavy girls!
The front tire for a ST1100 ABSII is the same size as the front tire for the ST1300.
You could probably run a ST1100 rear (160/70) on the ST1300 (170/60) with no issues as I have done the opposite. ;)
 
Well from experience and losing the same rear tire to damage before end of life - my front has the RP4 GT and I replaced the rear with a Bridgestone battalax t34 GT. It’s barely noticeable in control or cornering but the un matched tires are always on my mind. Tread design will be different. Just finished a 3200 mile run and it seems fine.

Both tires are designed the same and bias. Just different cuts in the tread pattern. I’m sure you’ll get tons of opinion here

Keep that air pressure up otherwise cupping will return.
Thanks for the tip.
 
you won't notice the difference between the 2 . Michelin states " MICHELIN® 2CT+ Technology™, which has been standard on the rear tire, is now applied to the front tire for better rigidity at lean, and more stability when cornering, especially under strong acceleration or heavy braking, compared to the previous generation. " The tire is beefed up like a "GT"
So as long as the tire has 2CT I should be good?

 
Good thread. I have my new t32 gt's ready to mount later this month. Likely the front will go on first,,, as the Metz Road tech-01 gt rear refuses to wear out. After reading above,,, I went looking for info on the "t34's",,, but have not found anything yet,,, even on the Bridgestone site. Is this a typo ?

Here are some interesting links:



 
So as long as the tire has 2CT I should be good?

unless your dragging you knees on turns the road 6 is very good. If your doing that look for a sport tire. The cupping problem your having is more caused by tread design. The more tread blocks there are the more flex they have. When I had my 1100 I used all kinds of tires and sizes. Never felt the tires were going to cause a problem. Look at a shinko verge 011, it's a totally different tread design. That tire didn't show any signs of cupping or feathering till after 6-7,000 miles. Put the 6 on and ride.
 
unless your dragging you knees on turns the road 6 is very good. If your doing that look for a sport tire. The cupping problem your having is more caused by tread design. The more tread blocks there are the more flex they have. When I had my 1100 I used all kinds of tires and sizes. Never felt the tires were going to cause a problem. Look at a shinko verge 011, it's a totally different tread design. That tire didn't show any signs of cupping or feathering till after 6-7,000 miles. Put the 6 on and ride.
Thanks @Al st1100 ! Now the fun part....removing and re-installing the tire :)
 
Thanks everyone for your input! Learned quite a bit about tires over the past few weeks. Just had my Road 6 delivered and will move on to phase 2 of operation tire change.....remove the front tire :rolleyes: for the first time ever!

Thanks again!
 
Good day,

I have a dilemma. My front tire appears to be cupping and I’m in search of a new one. The current tires (front and back) are Michelin Road 4 GT. The front is a 120/70 zr18. I cannot find this exact size in a GT anywhere and one distributor says they’re not made anymore. My question is which tire would be more suitable (keeping the rear Michelin Road 4 GT in mind) would be best? The rear tire has plenty of tread life.

Road 6 GT 120/70 R17
Road 6 non GT 120/70 ZR18

Thx

Jamie
I had the same issue. Last year I went Road 6GT rear, not knowing they didn't make the front in GT.
Totally loved the GT 6 rear, but I was starting to drift curves due to no tread on the sides.
I've never worn out the center of a tire before loosing the sidewalls first.
Found a shop locally that had a Road 6 in stock and took the wheel in.
The first thing I noticed was how light the handling was.
I had to learn how to steer all over again, as the lighter 6 required much less pressure to counter steer turns, and low speed handling felt like one of my dirt bikes.
I was pretty apprehensive at first, but quickly became acclimated to the much sportier characteristics.
The GT4 was worn in a triangle, which caused any grooves on the road to make the bike want to wander, and caused high speed wobble when I corrected.
I just got back from a 130 mile break in.
I marveled at the responsiveness, the only resistance was the gyroscopic centripetal force, with the front tire feeling impervious to all the road snakes, crakes, and grooves. Even those heinous elevation changes in the middle of the lanes.
From what I understand, Michelin is still making them in 17", they are just backordered.
Obviously not sure how well they will wear, but in truth, our ST's are relatively light on the heavy bike scale.
The Hogs, and Goldwings weigh in as 1/2 a ton or more, and need the heavy carcass.
When I started riding they didn't even make GT's.
I'm sold on the performance aspect already.
I'm even getting better mileage, but only a couple MPG's.
I'd go all Road 6 forever now.
I'm comfortable with only the rear in GT, as I believe once I'm on it with bags, top box, and backpack strapped onto the back seat, that's where most of the weight is.
Be careful changing it yourself.
I have a HF changer with a full compliment of spoons and accessories, and tore a non GT tire when mounting it myself.
I can do the rear myself, all my dirt bikes, enduros, and even my road track only racer with non-DOT slicks or rains, but the carcass is so much less than the GT that a spoon tore the first Raod 6 front tire. It was about 90° outside, so that may have exacerbated the very warm rubber. That was a $250 lesson.
Hope this helps.
 
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