tyre size 999r

[clint 999R]

has anybody fitted a180 rear tyre instead of the standard 190 i know the rim is a 5.5 so should be ok but iam worried about any high speed stability problems am going to fit supercorsa pros on

[andyb]

Ive done it, no stability probs and its better for turning in, full stop. And the 180 probably suits the 5.5 rim anyway"

[bazzer sps]

I've done it also same comments as Andy

[logyk]

Ditto

[logyk]

In fact I have today had a new 180 fitted....'kin 4 inch nail in my rear tyre (almost new !):flame:

[clint 999R]

thanks sorry about the nail

[Brogins]

Got the 190 pro supercorsa sc2 on the back, at the same time my friend fitted a 180 Supercorsa Sc2 directly at the track..Donington this summer.
Both 999 std, standard setting. I think the only difference is that the 190 has a small amount of rubber more that makes the bike turning a little bit slower, in my (rookie) opinion give you a little margin more of safety while round the cormers on a track day. On the same speed, one following the other, with pictures that showing the same leaning angle, with the 190 you still have a minimal line of "chicken strips" while the 180 is on the edge.
By the way, with the winter coming, I would choose another tyre... unless you are looking at track days.

[nathanhu]

i fitted a 180 rear after the first inspection , i havent had any problems

[chillo]

i was originally using 180's but earlier this summer i went back to 190's.
IMHO the 999 turns more than quick enough with a 190 i dont think 180's are really worth it for a road bike.
I have found it more stable went pushed hard on the edge of the tyre.
If the WSBK lads are now using 200 section tyres....:frog:

[Loz]

Originally posted by chillo
i was originally using 180's but earlier this summer i went back to 190's.
IMHO the 999 turns more than quick enough with a 190 i dont think 180's are really worth it for a road bike.
I have found it more stable went pushed hard on the edge of the tyre.
If the WSBK lads are now using 200 section tyres....:frog:

Blimey, I think (and did) exactly the same as Chillo here. I kept running out of 180 on the back of my 999S this summer.

Looks like I accidentally made a right decision! :lol:

Toseland had gone to 200's this year with some success and tried one at Brands, if recall correctly. I'm not sure he was entirely happy with it at Brands though.

[desmojen]

Not only are superbikes now using 200 and even 205 section tyres, more relevantly, supersports bikes are mainly running 190's now on 5.5" rims.

Quick question.
How does a motorcycle steer?

[keefer]

don't underestimate the side wall equation in all this.
now the big boys might be using larger tyres but they are not using 50 side walls.
I use a 190/55 some below are even on 60's