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Discussion Starter · #1 ·
Hi all,

It's coming around to the time to change my rear tire, so I'm doing a bit of research. A 200 Metz is sounding really good, but I was wondering since so many people are talking about changing sprockets and stuff to get the engine revving up faster, what about a lower profile tire?
I ran the tire size specs comparing a stock tire to a 200 Metz and found the following:

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
180/55-18 3.9in 12.9in 25.8in 81.0in 782 0.0%
200/50-18 3.9in 12.9in 25.9in 81.3in 779 0.3%

Has anyone put on a lower profile tire, like maybe a 180/50-18 or 180/45-18?
180/50-18 3.5in 12.5in 25.1in 78.8in 804 -2.7%
180/45-18 3.2in 12.2in 24.4in 76.6in 827 -5.5%

That would get the revs up a little faster.

Ideally I would like a 200/40-18 or close it I can find one...
200/40-18 3.1in 12.1in 24.3in 76.3in 830 -5.8%

Or even a 200/45-18 would also be good.
200/45-18 3.5in 12.5in 25.1in 78.8in 804 -2.7%

It would probably be best to go with a tire size that is less than 5% smaller diameter than stock since I could get away without recalibrating the speedo.

Does anyone know a tire manufacturer that makes these sizes?

Any oppinions, recommendations ideas are welcome....

Thanks
 

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correct me if I'm wrong, but with a lower profile tire, won't your engine rev higher at highway speeds. To me, mine revs too high at highway speed as it is and to purposely make it rev higher would be absurd.:2cents:
 

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NightRoder said:
Hi all,

It's coming around to the time to change my rear tire, so I'm doing a bit of research. A 200 Metz is sounding really good, but I was wondering since so many people are talking about changing sprockets and stuff to get the engine revving up faster, what about a lower profile tire?
I ran the tire size specs comparing a stock tire to a 200 Metz and found the following:

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
180/55-18 3.9in 12.9in 25.8in 81.0in 782 0.0%
200/50-18 3.9in 12.9in 25.9in 81.3in 779 0.3%

Has anyone put on a lower profile tire, like maybe a 180/50-18 or 180/45-18?
180/50-18 3.5in 12.5in 25.1in 78.8in 804 -2.7%
180/45-18 3.2in 12.2in 24.4in 76.6in 827 -5.5%

That would get the revs up a little faster.

Ideally I would like a 200/40-18 or close it I can find one...
200/40-18 3.1in 12.1in 24.3in 76.3in 830 -5.8%

Or even a 200/45-18 would also be good.
200/45-18 3.5in 12.5in 25.1in 78.8in 804 -2.7%

It would probably be best to go with a tire size that is less than 5% smaller diameter than stock since I could get away without recalibrating the speedo.

Does anyone know a tire manufacturer that makes these sizes?

Any oppinions, recommendations ideas are welcome....

Thanks
You're not going to notice any appreciable difference in quickness (or the lack thereof) with a 200 Metz vs a 180 Dunlop. Seems to me that if you're wanting to race, there are many things that you might do to improve your times in the quarter which would benefit you far more than installing a slightly lower profile tire. A lower profile tire (if you can find what you're looking for to fit 18 inch rims) is likely to reduce the tire's shoulder and available tread for cornering, thereby decreasing the amount of available lean angle, impairing handling on the street somewhat. I'm running a 200 Metz and like it just fine - it seems just as quick as the 180 (I'm not drag racing, though) in spin-up, handles well [but, then, I'm an R rider] and looks good . . . and we all know that looking good is what really matters, right :)rofl:)?
 

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Discussion Starter · #5 ·
Hey again,
Your all right except for one thing. I'm not interested in drag racing anymore, although an occasional street race is fun. I just want it to rev up faster. Yes this also means it will rev higher cruising on the highway at 60mph. So instead of it revving at 4000 rpm at 60mph maybe it would be 4200 rpm. With the Metz 200 you should be revving around 3900 at 60mph. Good for gas mileage!!! But as Fletch pointed out, it didn't make much of a difference.

I'd still like to find something that has a smaller diameter instead of a bigger one.

Thanks...
 

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Low Profile Tire

NightRoder said:
Hey again,
Your all right except for one thing. I'm not interested in drag racing anymore, although an occasional street race is fun. I just want it to rev up faster. Yes this also means it will rev higher cruising on the highway at 60mph. So instead of it revving at 4000 rpm at 60mph maybe it would be 4200 rpm. With the Metz 200 you should be revving around 3900 at 60mph. Good for gas mileage!!! But as Fletch pointed out, it didn't make much of a difference.

I'd still like to find something that has a smaller diameter instead of a bigger one.

Thanks...
Try a Buell conversion or, maybe, better yet: http://www.1130cc.com/forums/showthread.php?t=69971
 

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If you find the lower profile tire, I think you will sacrifice the nice roundness you need for cornering as previously stated. Go 26 tooth pulley for a 7.5% ratio change, assuming you have a 28 tooth now.
 

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Discussion Starter · #11 ·
Hey guys,

7.5% is a good number.
Would a pulley change involve changing the belt and other things?

Thanks
 
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