Article [13] ST1300 - Available Tires

gunsmoker said:
I need new tires--
My back tire is worn out and it dates to the spring of 2011 anyway. Front tire is even older from March 2010 and it also has a lot of small hairline cracks all over it.

So.... what's a good store to order them from if I don't go to a full service motorcycle shop that keeps their own in stock or will do their own ordering when I commit to buying tires from them?

If I wanted to get tires shipped to my house and then bring them to a friend who has a little motorcycle workshop in his garage, where should I get those tires from?
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I've had good luck with Cycle Gear, Rocky Mountain ATV, American Moto Tire, Iron Pony, and others. Darn sure miss Tim and his brother at Two Brothers Tire - they were right near you in Lawrenceville but they haven't been around for a while. If you can't get the tires mounted on your own Cycle Gear does cover that for a reasonable price. Some dealers will tell you to pound sand and won't mount tires they don't sell you but some will and this policy changes fairly often as parts/service guys rotate in and out.
 
jfheath said:
My experience doesn't match with what your garage say. Not by much, but my T32Gt have lasted consistently longer then my T31GTs did. Small margins, I admit, but every little helps. 5000miles is the norm for a rear tyre for me. Hills, two up touring, textured roads, weight etc.
My current set are promising to last longer.

I note the Bridgestone T33s have been announced with sizes that match the ST1300. They claim 47% increase in life. But no mention of GT version yet, but it does say the construction is now such that it is suitable for light and heavy bikes.

press.bridgestone-emea.com

Bridgestone Launches BATTLAX SPORT TOURING T33 Premium Sport Touring Motorcycle Tyres

Bridgestone Corporation (Bridgestone) today announced that the launch of the BATTLAX SPORT TOURING T33, a new sport touring radial motorcycle tyre, is scheduled for January 2025.The BATTLAX SPORT TOURING T33 is a next-generation sport touring tyre that maintains the necessary touring performance...
press.bridgestone-emea.com press.bridgestone-emea.com
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It appears that Bridgestone will not make a T33 tire for the ST1100 rear wheel (160/70-17).
 
jrp said:
It appears that Bridgestone will not make a T33 tire for the ST1100 rear wheel (160/70-17).
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I don't know. All of Bridgestones pages refer to 10 tyre sizes being avaikable in 2025 4 front, six rear with an additional 5 sizes being available from 2026. I have yet to find out what wheel and sizes those additional five will be.

If enough people contact them to find out ......??
 
After 10K miles on the Michelin R6s my front is wobbly and searching. It appears to be getting worse too. I have a PR5 rear waiting in the garage but need to find a front which might be like a genie in a lamp. Michelin site today still shows:image_2025-04-15_165653757.png
These guys suck for not continuing to support us. :nuts:
 
jrp said:
They have already published the sizes: https://www.bridgestonemotorcycletires.com/en-us/product-results/battlax-sport-touring-t33
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Yes that links shows the 10 sizes that I referred to. It doesn't show (as far as I can see) the additional sizes that are scheduled for 2026. But the downloadable pdf in the link that you provided does state "With more sizes coming in 2026"

In January 2025, the website stated that 5 additional sizes would be available. But I don't have a copy of that, and the page has changed.

It suggests that they may not have yet firmed up what those sizes will be. So I reckon that if people ask the question -"will there be a tyre for the ST1100ABS", It wouldn't do any harm !

1744785349127.png
 
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Mellow said:
I'll update this post as people provide info. But, I wanted to put a
table of the tire choices currently available as replacements for the STANDARD
tire on the ST1300. The Front/Rear columns will be the tire model
designators IF that brand supplies one for the front and/or rear.

*** Warning, there are an unusual number of tire failures reported on this site
associated with this model. They are listed as a proper fitment but are
not recommended.​
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Anyone have any experience with the Conti motion tires from Continental?
 
I think they referring to more manufacturers have 180/55x17 tires than 170/60x17. For example, Michelin does not appear to have have 170/60x17 tires, but they have quite a few alternative sizes.

For anyone wondering, here are the differences in the calculated size of the tires, it is well within the normal 3% recommended variance for tire height, but I am unsure if the tire width would be an issue.

1773093493895.png
 
Yes, so I see it as improvements on several fronts.. especially if you’re like me, solo and liteweight 😜
The numbers are very small but.. for me, in trying to balance the preload to both lower the rear and balance the shock for its middle range, it all adds up.. not to mention you get lower seat height, hmmm lower center of gravity.. all the numbers go in the right direction, tiny sure, but don’t even think about a larger contact patch- gimme that anyday and what about whole new world of available choices?
I know they have been ran on our bikes before so I assume fit is not a problem.. Oem rim width is applicable to 180 sizes, anyways thats what I did, we shall see. Who says bigger isn’t better in this case?
Ready for chastisement 😇
 
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180-55 is no problem. This year I have the new Bridgestone t33 on my bike. Rear is the 180-55.
Last year i had the Dunlop Roadsmart IV. With standard sizes.
The Bridgestone height is strange enough a little bit higher. I had them next to each other on the ground.
Speed odo is the same. With this tire.

I find the bike more stable.
 
Thanks!
In my case, it looks like the back was changed but not the front- it is @ 50% wearbar down, even this alone can be a major contributor to the weave, wait.. since becoming familiar with this idiosyncrasy.. I like dance! Much better, yeah am gonna call it the dance!! I can dance the dance! Don’t wanna weave the weave! 🤣
I digress.

Because I have to be concerned with tire cost, like everyone.. I want to try Pirelli Angel GTs, A spec.

My tire preferences are performance over tread life.

I am replacing the front, but I want to run the bike b4 I swap the back, it’s basically a new Avon Spirit ST.
My hope is that everything plays well together and I don’t throw out good as trash.
Both the Avon and Pirelli has same radial bias and belt structure so that will work, would be nice to be done buying tires this round.

Let the fun begin!
 
PanRider1300 said:
180-55 is no problem. This year I have the new Bridgestone t33 on my bike. Rear is the 180-55.
Last year i had the Dunlop Roadsmart IV. With standard sizes.
The Bridgestone height is strange enough a little bit higher. I had them next to each other on the ground.
Speed odo is the same. With this tire.

I find the bike more stable.
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That is great info to know! I love the Michelin tires, been running them since the Pilot Road 2CTs first came out, those things clung to the corners on my ZX14 and lasted 5-6 times longer than the stock Bridgestone tires.
 
Nightmare said:
I think they referring to more manufacturers have 180/55x17 tires than 170/60x17. For example, Michelin does not appear to have have 170/60x17 tires, but they have quite a few alternative sizes.

For anyone wondering, here are the differences in the calculated size of the tires, it is well within the normal 3% recommended variance for tire height, but I am unsure if the tire width would be an issue.
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any size comparison, even more info https://www.tacomaworld.com/tirecalc?tires=120-70r18-110-80r18
 
I am curious about how the ABS wheel speed sensors handle the different sizes, for example, going with 180/55-17 rear and stock front 120/70-18. I'm assuming there is significant variance permitted before the ABS kicks in as rear tires tend to wear faster than fronts and thus would change size more rapidly.
 
Magnetic sensors are installed on both of your motorcycle’s wheels, fixed to monitor the speed of the vehicle. These sensors are combined with a metallic ring gear, known as a tone ring or tone wheel, which can generate an electrical signal.
This signal will be sent to an ABS unit installed on your vehicle, which interprets up to 100 signals a second to understand the speed of the motorbike. If the unit measures a dramatic drop in signal pulses, it determines that the wheels are about to lock – especially if the pulses are almost at zero. When this happens, the system will adjust the braking pressure on the brake calipers, enabling the wheels to continue spinning.
So this has nothing to do with the height of the tires.

Tire sizes and width are not exactly the same as car tires.
This depends on the curve the tires make.
For example, last year i had the Dunlop Roadsmart IV in size 170/60/17. The Dunlop has more angle on the tread than the Bridgestone T33 in size 180/55/17
I had them next to each other on the ground. The Bridgestone was higher than the Dunlop. Dispite the different size.
The width of the Bridgestone is also less then i was expecting. Enough space on both sides in the frame.
 
So this has nothing to do with the height of the tires.
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Changing tire diameter can have an effect on a vehicles ABS system if that difference is to great. Changing the diameter (height) changes how fast the wheel rotates at a given speed. Larger diameter tires result in lower wheel RPM's, and therefore lower ABS ring RPM's, than the correct tire size does at the same speed. Smaller diameter tires result in greater wheel RPM's than the correct tire size does at a given speed.

On modern vehicles ABS systems do not only monitor if the wheels have stopped rotating. They also monitor if there is a significant enough difference in the rotational speed of the wheels while braking to cause it to intervene. Too big of a difference can also simply confuse the ABS system as it can not correctly interpret the speed signals that it is being sent causing it to deactivate the ABS and illuminate the fault light.

The ABS system on the ST1300 is very old technology and is not very sophisticated by todays standards. I doubt that the minor differences in diameters being discussed here will have any effect on it.

On automobiles a difference in total tire diameter from the specified tire size in excess of 3% is generally not recommended. On some modern automobiles it is as low as 1%.
 
Yeah, I know a person that drives a very expensive modern car and when he got a metal foreign object (lag bolt?) through one of his tires it had to be replaced —-AND THEN the other three tires on his car HAD TO BE REPLACED TOO WITH IDENTICAL NEW TIRES . Yet the other 3 were nearly new: maybe 10,000 miles on them and they were rated for 60,000 mile life.
However the other three tires had to be changed at the same time because the difference in diameter of the slightly worn tires compared to the wider brand new one would confuse the computer control system on this vehicle.
 
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