rear tyre size
 

that 180/190 thing again
bought a 190 for the 749 as i was a tad worried about the fact that i got rid of the chiken strips after only about 100 miles of owning the bike, and really didn't feel like i was pushing
the other day when browsing i came accross a thread that said some thing along the lines of, if you put a 190 on the rear you will use more of the front tyre
can some one explain this to i as i cant remember or find the thread

Basically, a bloke your size needs the fattest tyre they can get :lol:

bloke your size needs a van:frog:

Unless your using it on a track regularly, i dont see that it will make that much difference........ probably more important what type and make of tyre your running!

:lol:
:lol:
:lol:

This is really a personal choice thing. 190 will give a bigger contact patch at full lean but does NOT give you more lean angle. (check out 125GP with skinny section rear tyres!)

Just because you are using all of the tyre doesnt mean you are "off the edge" of the tyre, the side wall compresses under pressure and flattens the tyre giving the contact patch more area.

if you look at trackday or racers tyres they have rubber hanging off the edges but they dont run out of tyre.

Its actually very rare to run out of lean angle. Most of the time people who crash say they ran off the edge of the tyre because it makes them sound more of a race god than the truth. with a balanced throttle and good tarmac you'll deck out the fairing before running out of tyre.

I'm no expert, but I've run 180s and 190s on my 999S for some time now. I felt I was getting too far off the edge of the 180, but I'm sure that's just my own feeling, an expert would no doubt disagree. With the 190, I never get to the edge of the tyre at the back, although I do seem to be running out of front. Again, I'm sure that experts will tell me that I'm in no danger there.
I like knowing that my rear contact patch is bigger with the 190 and have more confidence in it. The slower steering that the 190 supposedly produces is easily dialled out (in my experience) by making sure your front and rear ride-height is sorted properly.

My 2p-worth and worth the investment :) Have fun playing Glyn, you'll find out what works for you - of that I have no doubt.

My point being, if your running bt012's or summat thatll do 3000 miles, they obviously have less grip potential than say a supercorsa pro or 209gp.......regardless of footprint size.:D

thats summit along the lines of my thinkin los
andy not sure what tyre i bought kb and marko said it was a good one though:confused:
its a 2 some thing

does it match yer front one? 2ct michelin......

What size front are you running????


Chris:burn:

I have tried both sizes and prefer the 190 for feel, the 180 should corner quicker but only noticable on the track. Also the 180 wore a hole right through my hugger on a trip to Europe last year (higher profile). So this year i had Tyre Man fit a 190 no problem.

thanks for the replies chaps
but what i really want to know is if having the larger tyre on the back will alter the amount of front tyre i use
i have no reason to think it will apart from the fact that i thought i read it on here some where??
the front is the origanal pilot power the new rear is the 2ct

Glyn this was my reply to Sharpo about my experiance with a 180 compared to a 190 rear tyre,plus and little about "pushing it"
You may of noticed that I had a 180 rear on at Cadwell and not my previous 190 that is f you could of got close enough :lol: :lol:

"Pushing the front" thats when you go into a corner a bit too hot/fast and still be on the front brake ,your'e then "pushing the front" tyre to its limit of adession and a possible spill.
The 180 is the width of the rear tyre (180mm) with a 180 on the rear your front tyre will turn quicker into a corner and lean over in comparison to the width of the rear tyre thus the "Chicken" strip ( where the tyre has not been used)will be wider, but closer to the edge on the rear
With a 190 mm rear tyre because its wider you find the front is slower to turn in and will wear nearer to the edge , as you are trying to overcome the extra width of the rear . Sounds complicated you need to see it more than talk about it. Hope that makes sense

With the 190 on the back I think you will see less wear on the front edges


Fordie

Hmm, pushing the front is where your transferring your body weight under braking through your arms (which generally are locked) to the bars and down to the front wheel, hence pushing.

what are you trying to achieve mate? saving some of the tread?

:

i am a tad worried that i have no chicken strips on a 180 tyre, that is fitted at the moment.
plenty of peeps have told i not to worry as even though i have reached the edge i've still got the full contact patch
but i've bought a 190 rear any way
i just remembered some one posting summit about it affecting the amount of front tyre used. fordie admited to that
i was a tad worried again as i think i've got pretty much to the edge at the front an all
i'm now going to read fordies post again and try to understand it:D

What pressure are you running the tyres at?

Pushing the suspension down just works against the fork spring and it "pushes" back against you, I doubt you can press a fork enough to compress it enough to have an effect on the wheel, if you did it would be bottomed out and more than likely the front wheel is losing tyre contact and bouncing, hardly what you want mid corner. you can load the front more with your bodyweight being transerred forward but that is not pushing the front ,it alters weight distribution and the rear will slide easier because there is less eight over it. As fordie says its when the tyre starts to lose grip you asre pushing the limits of tyre adhesion, typically downhill corners or holding too much front brake too late, its about slip, contact patch and grip not where you push.

32-34 front
34-36 rear
depending on the weather e.g hot day lower pressure

Mate,..yup you will not use up all the tread on a 190,but there really is nowt to worry about running a 180.At the end of the day its down to rider prefferance.Rog runs a 180 on his bike and has'nt had any probs,and he's no slouch.I had a 180 on my 999bip and did'nt like it,so I'm sticking with the 190 on the 'S'.

Oi Loikes 180's...cos neither of my bikes will take a 190 happily so I've never tried.

It all depends on the profile of the tyre IMHO. With Bridgestones or Pirellis on my ST I only have a couple of millimetres unscrubbed on the rear but the front has much wider strips. When I put Dunlop 207RR's on it the wear on the front went right to the edge but left a centimetre sized chicken strip at the rear.

No other changes to suspension, ride height, tyre sizes, pressures or riding style but swapping tyres swapped the end that had chicken strips.

On balance, I know that the nearer to the edge of a tyre you get the smaller the contact patch becomes and the less grip you've got - so I'd rather stay with a front tyre that copes with my speed of riding without troubling the edge of the tyre (except on trackdays).

I don't mind the odd little slide from the rear tyre, it's when the front lets go that I get skidmarks :eek:

Jools, I believe the reason your front 207 went to the edge is that the profile is very triangulated, you drop into a corner quicker with more tyre (when at full lean) in contact with the tarmac than the pirelli etc, as they roll in.


Chris:burn: