Thank you!
I'm still confused and I can't find the REVS Z tyre anywhere. Looks like I'll have to get the michelin one. Is the michelin one bad in terms of grip compared to the MRF one?

Disclaimer: Most of my learnings which I have mentioned below are not all by my own experience but the knowledge which I got by doing some search on internet and different forums like Xbhp,Bcmtouring
and Team-bhp. Also a lot of guys on these forums have helped me with their own experience and rich knowledge. I am thankful to all these guys for enriching my knowledge. I would also encourage if you all
guys could add-more to the knowledge pool here on this forum. I would also like to state that much of the information below you would be already knowing but I am just penning it down here so that for people
who are new to tyres can get consolidated information in this post and need not go through the trouble of reading a lot of material on internet.

4) Rim size:
It is important that we match the rim size with the tyre size. If we use a fatter tyre on a thin rim having less width, the tyre bulges out and makes a rounder profile at the contact patch thus practically reducing
the contact patch inspite of we going for a fatter tyre. The more rounder profile creates two problems, we have comparitive more wear at the centre of the tyre and also the beads at the rim are in considerable
tension which might lead to premature failure or the "burp". But this tyre might be good for cornering.
A short research on google and with my own little logic I comeout with this:

RTR 180 has 2.15j x 17" rims. It means 2.15 inches width of the rim measured between inside of the walls of the rim where the tyre beads sit.
RTR 180 has 110/80 x 17" tyre size.
Pulsar 220 has 2.5j x 17 rims. It has tyre size: 120/80 x 17".

So if you fit a 120 section tyre of Pulsar 220 in RTR 180 it is being made to sit on a rim having narrower width. This will lead to make the tyre to take the form of a U which has a very less crossectional radius.
I mean the Tyre will bulge and it will nearly have no flat patch at the centre of the tyre. So the contact patch of the tyre with the ground will be reduced inspite of we having fitted a more broader tyre. This will
defeat the whole purpose of going for a broader tyre. Now all this is theoretical and practically it also does happen which I have confirmed from a guy who has actually fitted a 120 cross section tyre in his
RTR180. But practically we need to measure the contact patch of 110 section tyre and 120 section tyre and then only we can conclude which really has a more bigger contact patch. I still feel that the 120
section tyre will have a more wider contact patch but it could have been more wider if we had used a rim size of 2.5j instead of 2.15j.
Also a tyre with more bulge will have more probability of it coming out of the wheel rim.
I referred to some wheel rim and tire size tables and found that some tire manufactures specify the wheel rim size on which they can be fit. Further googling led me to come with contradictory results. As per
some calculators it is not recommended to fit 120 section tyre on 2.15j rims, whereas some tyre manufacturers allow 120 section tyre to be fit on 2.15j rims. But even the tyre manufacturing companies dont
specify which particular tyre model can be fit on what type of rim.

So guys if you want a broader contact patch just fitting a fatter tyre would not give you a bigger contact patch, you might be required to change the rim to one with a bigger rim width say 2.15j (Apache rear rim)
to 2.5j (Pulsar rear rim).Also a more rounded profile of a tyre than your stock tyre means it has a bigger rolling radius and so it will mess up with your speedometer and also your bike will be raised a bit.

Mods: Please delete this post if it infringes or does not makes sense here.

any good tyre for front in pulsar 220f,i want in 90 size,any suggestions,is any michelin avaible in 90 size???mrf nylogrip 90 is it a good fr front in 220????

Yes Praful, Pilot sporty and leech is true. We have it on our race bike and they stick like a leech. We did not get a chance to try the grip in wet conditions but the tyre does have some serious grip all the way to the edge. One good part of the tyre that we noticed is that the carcass gets heated evenly and becomes sticky even if the edge grip is not used much.

We had the Pilot Sporty at MMSC for a whole weekend and the tyre wear was better than the MRF that we had used at Kari. I believe K Rajini also uses the same on his machine.

So the extra width doesn't change anything? Sorry for the noob question.. Just curious.

definitely you will have certain drop in mileage, acceleration and top speed.

I actually disagree with you in Point 4. As my Pulsar150(UG4.5) has 100/80-17 as stock tyre and I have changed it to Pirelli Sport Demon 130/80-17. I am having a very good handling and completed 10k+ . I never faced any such issues rather it has helped me increasing comfort for pillion rider as well as me and also bettered my breaking and handling too. Well before that I was using Dunlop Tuffgrip 120/80-17 Tubeless. That actually was pretty bouncy and never inspired me for cornering, though it was short lasting relationship. But that was very scary as well actually which pushed me for a change. So it is not always the spec but the brand also matters. Pirelli currently I am using is much light weight than Dunlop Tuff Grip I have used earlier. And yes Dunlop TuffGrip did increased my bikes height.