Rear tyres:180 or 190? What's your preference?

[DEATH_INC.]

Having a 190 on a 5.5 rim squashes the tyre into a taller profile, that can make the turn in aggresive, because the tyre is pointier you basically fall into the turn, but once your over, there is greater grip through a larger contact patch.

And the bad part is?????

[Peter Smith]

Having a 190 on a 5.5 rim squashes the tyre into a taller profile, that can make the turn in aggresive, because the tyre is pointier you basically fall into the turn, but once your over, there is greater grip through a larger contact patch.

Hi Tony,
I heard some racing guys were trying 190's on their 600's with 5.5" rims. What's your opinion??
I have a GSXR1100 with a 5.5" wide rim do you think a 190 tyre would be better on the track than a 180???

[klyong82]

Yea i got them fitted for $600 PP2's

my power is shit i reckon. If im cruzing at 100km/hr im only ever in 4th geear but i know my rear is the standard 40 tooth. Unsure of front but surely must bbe geared to high.

4th 100km/hr about 4600revs roughly
What gear rev's you getting?

I'll need a rear tyre soon and I am looking at getting another PP2.

I think that sounds pretty stock in my opinion 16 front and 40 rear. I gone down to 15 in the front gives me alittle bit more acceleration power (wheelie power) but it sacrifices top speed. More fun and very common for the 04-05 mod.

[Bladeslapper109]

I'll need a rear tyre soon and I am looking at getting another PP2.

I think that sounds pretty stock in my opinion 16 front and 40 rear. I gone down to 15 in the front gives me alittle bit more acceleration power (wheelie power) but it sacrifices top speed. More fun and very common for the 04-05 mod.

Im getting about 3600 rev in top at 100..

LOL, less top speed, I been 255 (controlled conditions of course) and i dont think i was even in 6th? Might be wrong on that thou. still had heaps to go anyway but ran out of track

[DEATH_INC.]

Hi Tony,
I heard some racing guys were trying 190's on their 600's with 5.5" rims. What's your opinion??
I have a GSXR1100 with a 5.5" wide rim do you think a 190 tyre would be better on the track than a 180???

There'd be a couple of advantages for ya, with the masses of GRUNT those things made it'd help put it down better when you're cranked over, plus the added advantage of lifting the rear (steepening the rake and helping initial turn-in) and giving a bit more ground clearance. I guess the disadvantages would be a bit more effort to get it right over (those things are big and heavy enough as it is!) and maybe a little more tyre flex....also will it fit in the arm without hitting the front? Some of those old things were a little tight for room and the 190/55 (don't use a 50 on a 5.5) is a fair bit taller...
And to answer the first part of ya question as stated earlier the guy in aus my mate worked with (top ten in s/s over there) shaved around 5 sec a lap going from a 180 to a 190 with no other changes....

[klyong82]

Im getting about 3600 rev in top at 100..

LOL, less top speed, I been 255 (controlled conditions of course) and i dont think i was even in 6th? Might be wrong on that thou. still had heaps to go anyway but ran out of track

Mines is about 4000rpm on top cruising at 100. Its loud too...I got yoshi and PC3 and a speedohealer to recailibrate the speedo..

[Bladeslapper109]

Mines is about 4000rpm on top cruising at 100. Its loud too...I got yoshi and PC3 and a speedohealer to recailibrate the speedo..

How does a speedo healer work?

[Peter Smith]

There'd be a couple of advantages for ya, with the masses of GRUNT those things made it'd help put it down better when you're cranked over, plus the added advantage of lifting the rear (steepening the rake and helping initial turn-in) and giving a bit more ground clearance. I guess the disadvantages would be a bit more effort to get it right over (those things are big and heavy enough as it is!) and maybe a little more tyre flex....also will it fit in the arm without hitting the front? Some of those old things were a little tight for room and the 190/55 (don't use a 50 on a 5.5) is a fair bit taller...
And to answer the first part of ya question as stated earlier the guy in aus my mate worked with (top ten in s/s over there) shaved around 5 sec a lap going from a 180 to a 190 with no other changes....

Thanks Dude,
Sounds like its worth a try. I was having trouble at Taupo getting to flick from one side to the other through the infield, bloody heavy bike.
Cheers Mate

[Peter Smith]

I agree with what Mishy has said mate. I was the first in NZ a few years back to use the 190 on a 5.5 rim in the race scene

The 190 made the turn in more tricky, but the exit grip was heaps better, putting the 190 on a 5.5 rim, alters the correct profile of the tyre, where when the bike is on its side, it is giving you a bigger foot print of contact rubber to the road, simislr to using the 16.5 rim

Hi Shaun,
With the 190 on a 5.5 rim, what was it like flicking from left to right etc.
I got an 89 GSXR1100 with a 180 slick on a 5.5 rim and it is a bit slow in changing direction. e.g. Puke Jenian into Castrol, and at taupo's infeild.
Wouldn't the 190 be harder to flick from one side to the other because the center diameter would be bigger??

[klyong82]

How does a speedo healer work?

A piece of gadget that attached to your ECU and the other to the battery i think and if I make any changes like tyre from 190 to 180 or different tooth sprocket that may alter the speedo accuracy...just go to their website and push in the variables and they will show you the instructions to recalibrate back to the right speed.

Have a read...
http://www.healtech-electronics.com/

[naphazoline]

A piece of gadget that attached to your ECU and the other to the battery i think and if I make any changes like tyre from 190 to 180 or different tooth sprocket that may alter the speedo accuracy...just go to their website and push in the variables and they will show you the instructions to recalibrate back to the right speed.

Have a read...
http://www.healtech-electronics.com/

How much for a speedo healer??

[Bladeslapper109]

So is the speedo read out off ur normal speedo or the other gaget?

[klyong82]

How much for a speedo healer??

I cannot remember exactly but I think it was about $200

So is the speedo read out off ur normal speedo or the other gaget?

normal speedo
bro.....check the pics out.

[Bladeslapper109]

oh yea how easy is it to install?

[klyong82]

oh yea how easy is it to install?

Took about 45 mins. Had to connect it to the speedo sensor and not ECU as I mention before. IF you are handy in wiring and electrics then should not be an issue in installing it yourself. I had a mate help me.

edit: why would you need a speedohealer if you have stock gearing and tyres? Your speedo should be only out by up to 5% due to the factory error. Mine was out by 10% after the gearing change plus the factory error.