rear tyre profile.. - Honda Motorcycles - FireBlades.org
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post #1 of 23 Old 10-28-2004, 11:32 AM Thread Starter
 
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rear tyre profile..

I currently run a 180/55-17 like most people in this world and some of us run 190/50's however, has anyone tried a 190/60-17???

a 180/55 rear produces a height of 531mm
a 190/50 rear produces a height of 527mm
a 190/60 rear produces a height of 546mm

I understand why a 180/55 rear on a litre bike provides better turn in than say a 190/50 however, what would a 190/60 create? a better improvement or a complete nightmare?

has anyone used that size yet?? i'm tempted to try.

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post #2 of 23 Old 10-28-2004, 12:02 PM
 
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Re: rear tyre profile..

I've never seen a 190/60. Who makes them?
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post #3 of 23 Old 10-28-2004, 12:04 PM
 
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Re: rear tyre profile..

dunlop. You'll likely need to lengthen your chain to use that tire. Its VERY BIG!
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post #4 of 23 Old 10-28-2004, 12:23 PM Thread Starter
 
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Re: rear tyre profile..

Quote:
Originally Posted by ccwilli3
dunlop. You'll likely need to lengthen your chain to use that tire. Its VERY BIG!
you know not how loose my chain be
benefits to this size in tire????

don't keep us in the dark!

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post #5 of 23 Old 10-28-2004, 1:45 PM
 
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Re: rear tyre profile..

I just moved up to the bigger dunlop 190/60 or 65/17 dot gpa race tire...it's the same 195/xx/17 slick. It's 13mm taller than the dot 180/55. So you may need to lower your shock a bit 6.5mm to maintain same rear height. I had to get a longer chain, rear axle was moved back about 1/4" or so, near the limit of adjustment (get a good chain that won't stretch too much) lengthening the wheelbase...so I only changed my shock height by 3mm or so. I also put some washers under the hugger bolts to raise it up a touch...may or may not be needed if the wheel is back far enough but I wanted to count for the tire expansiona at high speeds.

The beni's....More F-n Grip!!!!! If your spinning up the rear often, you will find the hastle of the change WELL worth it! Trust me! I still spinn it up but there is so much more grip. It's a heavier tire..but the bigger contact patch makes up for it. It feels planted. The dunlop guy tells me they haven't sold a 180 at a ama race in quite a while...I now understand why! You can really get on the gas harder and sooner!

Another beni is that once setup for that size tire you can switch from dot to slicks w/o chassis changes..same size.
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post #6 of 23 Old 10-28-2004, 2:51 PM
 
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Re: rear tyre profile..

I am running the 190/63 17 slick from Bridgestone and like it a lot. It has the same diameter as their 180 slick, so the ride height didn't change but it does have a bit more meat at the edges.
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post #7 of 23 Old 10-28-2004, 7:26 PM Thread Starter
 
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Re: rear tyre profile..

i'm sold... going in that direction "fo sheezy"
is that what the kids are saying these days

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post #8 of 23 Old 10-28-2004, 7:31 PM
 
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Re: rear tyre profile..

There's no 190/55ZR17 in your list!!

I like my 180/55s.

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-Rob.
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post #9 of 23 Old 10-28-2004, 8:38 PM
 
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Re: rear tyre profile..

Quote:
Originally Posted by 02FBlade
I just moved up to the bigger dunlop 190/60 or 65/17 dot gpa race tire...it's the same 195/xx/17 slick. It's 13mm taller than the dot 180/55. So you may need to lower your shock a bit 6.5mm to maintain same rear height. I had to get a longer chain, rear axle was moved back about 1/4" or so, near the limit of adjustment (get a good chain that won't stretch too much) lengthening the wheelbase...so I only changed my shock height by 3mm or so. I also put some washers under the hugger bolts to raise it up a touch...may or may not be needed if the wheel is back far enough but I wanted to count for the tire expansiona at high speeds.

The beni's....More F-n Grip!!!!! If your spinning up the rear often, you will find the hastle of the change WELL worth it! Trust me! I still spinn it up but there is so much more grip. It's a heavier tire..but the bigger contact patch makes up for it. It feels planted. The dunlop guy tells me they haven't sold a 180 at a ama race in quite a while...I now understand why! You can really get on the gas harder and sooner!

Another beni is that once setup for that size tire you can switch from dot to slicks w/o chassis changes..same size.
Were you using a stock length chain that needed to be lengthened?

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post #10 of 23 Old 10-29-2004, 10:38 AM
 
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Re: rear tyre profile..

Nah. Trashed the stocker for lighter 520 kit long ago. You dont want to lengthen any old/used chain...buy a new one. I suggest a 520 chain & spocket kit. Drop one tooth in the front and up 2 on the rear. The bigger rear will effect the gearing a touch. I had -1 on the front & stock sized rear (43) before changing to the big rear tire. Now have -1 on the front +2 on the rear...still could go lower for most tracks but I'm happy with it for now. You'll have to have the axle back to the last 1/4-1/2" of adjustment in the back for clearance.

For deals on chains & sprockets hit up my sponsor.... 10bombmotorsports = www.10.bomb.com Web is still being upgraded but he can get about any parts you need.
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post #11 of 23 Old 10-29-2004, 11:08 AM Thread Starter
 
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Re: rear tyre profile..

Quote:
Originally Posted by 02FBlade
Nah. Trashed the stocker for lighter 520 kit long ago. You dont want to lengthen any old/used chain...buy a new one. I suggest a 520 chain & spocket kit. Drop one tooth in the front and up 2 on the rear. The bigger rear will effect the gearing a touch. I had -1 on the front & stock sized rear (43) before changing to the big rear tire. Now have -1 on the front +2 on the rear...still could go lower for most tracks but I'm happy with it for now. You'll have to have the axle back to the last 1/4-1/2" of adjustment in the back for clearance.

For deals on chains & sprockets hit up my sponsor.... 10bombmotorsports = www.10.bomb.com Web is still being upgraded but he can get about any parts you need.
so we get to the bottom of this... good sales tactict
but he can't help me being here in the UK

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post #12 of 23 Old 10-29-2004, 12:35 PM
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Re: rear tyre profile..

Pirelli and Metzler both make a 190/55. I've been running that size for some time now and like it.

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post #13 of 23 Old 10-29-2004, 1:04 PM
 
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Re: rear tyre profile..

Quote:
Originally Posted by 02FBlade
Nah. Trashed the stocker for lighter 520 kit long ago. You dont want to lengthen any old/used chain...buy a new one. I suggest a 520 chain & spocket kit. Drop one tooth in the front and up 2 on the rear. The bigger rear will effect the gearing a touch. I had -1 on the front & stock sized rear (43) before changing to the big rear tire. Now have -1 on the front +2 on the rear...still could go lower for most tracks but I'm happy with it for now. You'll have to have the axle back to the last 1/4-1/2" of adjustment in the back for clearance.

For deals on chains & sprockets hit up my sponsor.... 10bombmotorsports = www.10.bomb.com Web is still being upgraded but he can get about any parts you need.
Sorry, what I meant is if it was necessary to lengthen the chain (any chain) to run the 190/60 or can you leave the original length. You added two teeth on the back so I'm assuming you needed a longer chain, but did you have to further lengthen to accomodate the tire?

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post #14 of 23 Old 10-29-2004, 2:16 PM
 
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Re: rear tyre profile..

Quote:
Originally Posted by Red Rider
Pirelli and Metzler both make a 190/55. I've been running that size for some time now and like it.
hmmmm could it be because it's the same tire with a different finish cut?
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post #15 of 23 Old 10-29-2004, 2:22 PM Thread Starter
 
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Re: rear tyre profile..

Quote:
Originally Posted by abtech
hmmmm could it be because it's the same tire with a different finish cut?
you might be onto something here...

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