Tire size - non FJR

[Fencer]

With the aquisition of my new toy, I need a new rear put on it.

It came with GP tires (Dunlop Sportmax GP), of which I think are well beyond my capabilities at this time. I was going to replace it with a good track tire, just not GP.

After browsing SW Moto I am finding this tire to be an odd size. a 190/55.

I can find 190/ 50 or 60 and even a 180/ 55, but not the 190/55 without a $314 pricetag.

given the former racers here and knowledge pool. of the 3 choices above which size should I use a the closest replacement?

 

[Scab]

I'll bet money it came factory with 180/55's. Not that that means anything regarding what you should put on there to run track days, but I'm jus' sayin'. Besides, it's a number that'll open a lot more doors of choice.

 

[racer157]

With the aquisition of my new toy, I need a new rear put on it.
It came with GP tires (Dunlop Sportmax GP), of which I think are well beyond my capabilities at this time. I was going to replace it with a good track tire, just not GP.

After browsing SW Moto I am finding this tire to be an odd size. a 190/55.

I can find 190/ 50 or 60 and even a 180/ 55, but not the 190/55 without a $314 pricetag.

given the former racers here and knowledge pool. of the 3 choices above which size should I use a the closest replacement?

There is very little to be gained by going to a larger tire. In some cases a larger tire will only flex more and create handling problems. If you change aspect ratio be careful , you will affect the roll characteristics and this will make it harder to transition from one direction to another. The fjr is a great street bike but a little on the porky side to go flat out on a race track, so please be carefuland have fun. Racer 157

 

[Fencer]

Racer,

I think you missed the question.

This is on a Gsx-R not FJR.

Scab you are prob right about the 180 being the stock tire. I was just looking to replace what this bike has been set up to run on.

 

[Randy]

you aren't going to be going for any lap records or race wins right away, so, go with a race compound tire or track day tire (i.e. Dunlop Qualifier, Metzeler Sportec M3) in a 180/55 that you can find for a decent price

 

[vectervp1]

Most of the folks I've met that have dedicated track bikes all run 180/55 tires, even if stock they came with a 190/50.