180/55/17 or 190/50/17

colin said:
anybody running on 180/55/17 as to what the manual says the 19/50/17 would welcome feed back.
Click to expand...

55s are fine. It raises the rear a bit and provides for faster turn in. I plan to try a pair of 55s next time I get a set. Like VA said it needs to be 190 for the GenII. 180s on the GenI.
 
OK, lets do this again. Per tire manufacturer's specifications, you can run a 180 on a 6 inch rim. Those manufacturers are Dunlop, Michelin, Avon, etc.... I personally run a Michelin Pilot road 2 180/55/17. I like it because it has better turn in than the 190/50 and has lower reciprocating weight. My bike has all the mods, makes over 150hp, and I have never had traction issues. So everyone hears it the first time this time JUST MY OPINION
 
per what tire manufacturer's specs? lets see a source on that one.

Also... Yamaha puts a 190 section width tire on the bike. They spend literally million of dollars on research and development. Race teams for Yamaha, in order to get a quicker turn in use a 190/55 tire to replace the 190/50. Both on a 6" wheel.
 
^^^ My 1125R came with a 180 Diablo IIIs stock and worked great. That bike made about 85 foot pounds of torque, much more than our bike, and I had no traction issues at all. I think a 180/55 will work fine.
 
va_rider said:
per what tire manufacturer's specs? lets see a source on that one.

Also... Yamaha puts a 190 section width tire on the bike. They spend literally million of dollars on research and development. Race teams for Yamaha, in order to get a quicker turn in use a 190/55 tire to replace the 190/50. Both on a 6" wheel.
Click to expand...

Race teams for yamaha also make a bunch more power than anyone on here, and do you really think that they put a 190 on only for performance? Ya don't think it may have just a teensy bit to do with this stupid obsession for a huge back tire?

Copied from Dunlop's website for Sportmax Q2, acceptable rim width for 180/55 tire is EITHER 5.5 inches or 6.0 inches. I am not telling anyone what to use, and I am not telling anyone they are wrong. I am giving my preference in tire based on turn in and reciprocating weight savings.

SPORTMAX Q2
120/60ZR17 55W BW 31SM-21 3.50 22.80 4.63 4/32 480 @ 42
120/70ZR17 55W BW 31SM-75 3.50 23.80 4.83 4/32 520 @ 42
160/60ZR17 69W BW 31SM-51 4.50 5.00 24.81 6.72 7/32 716 @ 42
170/60ZR17 72W BW 31SM-53 4.50 5.00 5.50 0.00 0.00 7/32 785 @ 42
180/55ZR17 73W BW 31SM-30 5.50 6.00 24.97 7.46 7/32 805 @ 42
190/50ZR17 73W BW 31SM-22 5.50 6.00 24.95 7.54 7/32 805 @ 42
190/55ZR17 75W BW 31SM-65 5.50 6.00 25.32 7.85 7/32 853 @ 42
200/50ZR17 75W BW 31SM-82 6.00 6.50 25.00 7.82 7/32 853 @ 42

I don't mean to sound testy about this, but we have been through this before and for the tenth time THIS IS MY OPINION. If you think I am an idiot ignore me

Thank you for your opinion Hellgate!
 
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