Author Topic: 160/70-17 on Meanstreak Wheel  (Read 8463 times)

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Offline Bergmen

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Re: 160/70-17 on Meanstreak Wheel
« Reply #25 on: February 10, 2012, 04:09:06 pm »
I will add that the 160/70 is also stock on the K1200LT and some Harleys, which are also on the touring side of the spectrum.  Like I said, it would be nice if there were more selection, but I'm not interested in a pure sport tire, so I don't mind that the selection is what it is.  Besides, I may end up really liking the Avon, and not need any more selection, anyway.  After that, I'll probably have a C14   :)

JMHO

There are actually some Harleys with 17" rims? Whoda thunk it?

Dan
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Offline worncog

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Re: 160/70-17 on Meanstreak Wheel
« Reply #26 on: February 10, 2012, 09:33:10 pm »
Go ahead...put that seventh gear on and you'll be more than pleased with the 170. I think the 170 has a better radius for the twisties, but that is just my opinion.
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Offline diablo6v

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Re: 160/70-17 on Meanstreak Wheel
« Reply #27 on: February 13, 2012, 12:22:19 pm »
I am running the 170/60/17 rear mean streak and SISF's 7th gear unit and I love the setup. I also have the power cams so she screams.... ;D

Offline Bob_C_CT

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Re: 160/70-17 on Meanstreak Wheel
« Reply #28 on: March 29, 2012, 12:34:49 am »
I'm looking at tires for the 17"/17" setup now too. Was going to go with the Michelin PR3s but low and behold the rear is only offered in the 170 size as mentioned earlier. I don't want to lose height for centerstand usage and increased revs. I have the Storm Ultra 2 on the stock front rim and Azzaro on the rear that I have been very happy with, except that I'm 500-1000 miles away from wear indicators on the rear with 3.5k on the tire. So I'm thinking about sticking with the Avon and going Storm Ultra 2 front and back.

Those that are running the 160/70/17 rear have mentioned that the chicken strips are gone, do you feel that performance is suffering in the twisties such that you are loosing or not getting full rear tire traction because of this? What are the thoughts on having the already low front end and then putting this taller tire on, quicker lean in? I do about 70% slab commuting and 30% backroads 2 up 1/2 the time so taking it easy then. But it is nice to know that you can lean it over if need be especially in an avoidance manuever.

I guess if my m/c budget for this year wasn't near depletion after getting ZRX front end parts and new treads I would go for the 7th gear, modify centerstand and go with the 170s. Maybe I will do that after I wear out this set of treads in 10k+ miles, I hope.

Anyways I just wanted to get some feedback to get a warm and fuzzy before going with the 160/70/17. If I haven't said it lately, Thanks for all the help and advice I have gotten from the members of this fine group.

Southern Connecticut.
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Offline Dave Scott

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Re: 160/70-17 on Meanstreak Wheel
« Reply #29 on: March 29, 2012, 11:03:03 am »
Bob,
I have found that the bike handles better with the 170 than the 160.  it feels quicker to turn in.  I will be going back to the 170 and staying there on my next tire.  I plan to install a C14 shock to raise the rear a little bit to recover some of the height lost.  I'm also getting a ZRX front end to run a 17 out front too.

As for the center stand, I could still use it with the 170.  it was just a little more work to get it up on it.

HTH

Offline Bergmen

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Re: 160/70-17 on Meanstreak Wheel
« Reply #30 on: March 29, 2012, 02:00:28 pm »
I've only run the 160/70 since the conversion. I was drawn to that size for a few reasons-

a) It is the largest diameter of the tires in the range that the Concours can use. This lowered the final drive ratio a bit which I felt was an advantage prior to me getting the 7th gear mod.

b) The extra height made it easier to get on the center stand. This was beneficial since the ZRX front forks are shorter and the 120/70 ZR17 tire is 1/2" smaller in radius.

c) This is not very important but the 160/70 has the highest load rating of all of the 17" rear tires. I just kind of figure tougher is better.

I started out with the Storm at both ends and now have the Storm 2 Ultras F/R.

I'm hesitant to try any changes only because if I don't like the resulT I would have to live with it for the life of the tire. Since the Ultras are multi-compound tires, it could be awhile. I find the 120/70 ZR17 front and the 160/70 R17 rear to be as close to ideal as I've ever experienced.

I think it would be terrific if there could be a session somewhere with a 160/70 tire mounted on one rim and a 170/60 on another so one could do a comparison ride by just swapping wheels. This would be a valuable test that could allow a rider to decide without taking the chance of getting a size that does not suit their needs.

Dan
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Offline Rev Ryder

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Re: 160/70-17 on Meanstreak Wheel
« Reply #31 on: March 29, 2012, 02:59:26 pm »
I've been running the 170/60-17R for a couple of years and while it has a good contact patch and excellent adhesion, it hasn;t the nimbleness that the stock 150/80-16R had IMHO.  And without the 7th gear unit I find the increased revs annoying and performance robbing (on the turbo).  Not sure where I'm going from here as I'm not tickled with the tire choices in the 160/70 category.  Avon Storm is the only choice of that category that I can appreciate.  I would REALLY like to run some MORE serious performance rubber, but there just isn't any that I'm interested in that will fit.  Go figure.  I may just stick with the 170/60s and at some point maybe try a 7th gear unit if I win the lottery.   ;D
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Offline connie_rider

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Re: 160/70-17 on Meanstreak Wheel
« Reply #32 on: March 29, 2012, 03:41:29 pm »
Which has the largest actual diameter?
160/70 or 170/60?

REv, just to help you with nimbleness and revs,,,,, I'll trade you my 16" Rear wheel for your 17"....    ;) 8)

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Offline 2linby

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Re: 160/70-17 on Meanstreak Wheel
« Reply #33 on: March 29, 2012, 03:49:47 pm »
Which has the largest actual diameter?
160/70 or 170/60?

REv, just to help you with nimbleness and revs,,,,, I'll trade you my 16" Rear wheel for your 17"....    ;) 8)

Ride safe, Ted

Math wiz!   :-[

160/70 (aspect ratio) = 112mm height x 2 + 432mm (17" wheel diameter) = 656mm/25.4mm (1") =25.83" (nominal)

Vs

170/60 (aspect ratio) = 102mm height x 2 + 432mm (17' wheel diameter) = 636mm/25.4mm (1") =25.04" (nominal)

Conclusion: 160/70-17 is taller than a 170/60-17 by  .79"(nominal)
« Last Edit: March 29, 2012, 03:55:45 pm by 2linby »
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Offline Bergmen

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Re: 160/70-17 on Meanstreak Wheel
« Reply #34 on: March 29, 2012, 04:14:40 pm »
Avon lists the 160/70 at 25.7" diameter, the 170/60 at 24.9" diameter.

But I see that Bob beat me to it.

Dan
« Last Edit: March 29, 2012, 04:19:58 pm by Bergmen »
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Offline Dave Scott

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Re: 160/70-17 on Meanstreak Wheel
« Reply #35 on: March 29, 2012, 04:57:41 pm »
I've been running the 170/60-17R for a couple of years and while it has a good contact patch and excellent adhesion, it hasn;t the nimbleness that the stock 150/80-16R had IMHO.  And without the 7th gear unit I find the increased revs annoying and performance robbing (on the turbo).  Not sure where I'm going from here as I'm not tickled with the tire choices in the 160/70 category.  Avon Storm is the only choice of that category that I can appreciate.  I would REALLY like to run some MORE serious performance rubber, but there just isn't any that I'm interested in that will fit.  Go figure.  I may just stick with the 170/60s and at some point maybe try a 7th gear unit if I win the lottery.   ;D

Rev, your findings are completely different from mine, but it's possible it's apples and oranges because of circumstances.

I switched from Dunlop E3s in stock sizes.  I installed the 17 inch rear and put new shinkos on both ends, running a stock front size and a 170/60-17 in the back.  I found the handling immediately impressive, but to be fair, part of that was surely due to the fact that I had new rubber on.  they ALWAYS feel better, right?  After the shinkos wore out, I recently changed to Bridgestone BT023s using a 160/17 rear and stock front.  The slowness of turn in was immediately evident to me.

I actually found the rise in RPMs on the 170 tire to be advantagous once I got used to it.  Running it, I'd downshift once to get RPMs up for a pass.  With stock and the 160, I've noticed I'm more confident downshifting twice to pass.  We're talking 2-lane passed done fast to reduce risk in my case. 

Once I switch back to the 170, if I DO get tired of the RPMs, I'm going with the 7th gear unit rather than switching back to the 160 because of handling reasons.  Of course, if my next set of tires show me something different, I may change my course of action.  ie, perhaps it's something with the profiles of the bridgestones vs the shinkos that had some impact on how it feels to me.

Anyway, I suppose everyone has different feels about how they ride and what makes sense to them, right?  :)

Offline Rev Ryder

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Re: 160/70-17 on Meanstreak Wheel
« Reply #36 on: March 29, 2012, 07:18:05 pm »
Which has the largest actual diameter?
160/70 or 170/60?

REv, just to help you with nimbleness and revs,,,,, I'll trade you my 16" Rear wheel for your 17"....    ;) 8)

Ride safe, Ted
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Offline Dave Scott

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Re: 160/70-17 on Meanstreak Wheel
« Reply #37 on: March 30, 2012, 12:47:46 pm »
Been thinking more about this topic while out riding.  Another thing comes to mind.  The meanstreak comes stock with a 170/60.  Putting a 160/70 on that rim would flatten the profile some on the tire, wouldn't it?  May or may not be enough to be a factor, but that could explain the different turn-in feel, couldn't it?

Offline Bergmen

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Re: 160/70-17 on Meanstreak Wheel
« Reply #38 on: March 30, 2012, 01:46:24 pm »
Been thinking more about this topic while out riding.  Another thing comes to mind.  The meanstreak comes stock with a 170/60.  Putting a 160/70 on that rim would flatten the profile some on the tire, wouldn't it?  May or may not be enough to be a factor, but that could explain the different turn-in feel, couldn't it?

On the Avon site the recommended rim width for both tires is 4.50. For the 160/70 the alternate acceptable rim widths are 4.25 to 5.00. For the 170/60 they are 4.50 to 5.50.

So the profile of both tires are retained within the recommended rim widhs with both tires.

Dan
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Offline Dave Scott

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Re: 160/70-17 on Meanstreak Wheel
« Reply #39 on: March 30, 2012, 07:19:41 pm »
Been thinking more about this topic while out riding.  Another thing comes to mind.  The meanstreak comes stock with a 170/60.  Putting a 160/70 on that rim would flatten the profile some on the tire, wouldn't it?  May or may not be enough to be a factor, but that could explain the different turn-in feel, couldn't it?

On the Avon site the recommended rim width for both tires is 4.50. For the 160/70 the alternate acceptable rim widths are 4.25 to 5.00. For the 170/60 they are 4.50 to 5.50.

So the profile of both tires are retained within the recommended rim widhs with both tires.

Dan

But wouldn't it still be true that the 160 will always have a flatter profile than a 170 if mounted on the same width?  You're right that it's a recommended size, just that the profile will always be flatter?  That would have impact to the turn-in feel, true?  Not being an engineer, I'm just thinking logically....or illogically.   :))

Offline WillyP

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Re: 160/70-17 on Meanstreak Wheel
« Reply #40 on: March 30, 2012, 08:24:04 pm »
No, a /60 will have a lower profile than a /70. The 160 or 170 refers to overall width, as I recall. The /60 or /70 refers to the ratio between the width and height. So a 160/70 has a narrower width, and , as a ratio to the width it is taller. Since 4.50 is listed as 'recommended' for both, the ratio should be accurate.
« Last Edit: March 30, 2012, 08:29:49 pm by WillyP »
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Offline Dave Scott

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Re: 160/70-17 on Meanstreak Wheel
« Reply #41 on: March 30, 2012, 08:42:54 pm »
but with rim size being equal, a 170 will be squeezed more onto the rim, thereby making it's profile more rounded than the 160, wouldn't it?

Offline WillyP

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Re: 160/70-17 on Meanstreak Wheel
« Reply #42 on: March 30, 2012, 08:49:24 pm »
No, but, maybe.  :-[

I think since the manufacturer has recommended a 4.5 inch rim, for both, the fat part of the tire will be wider on the 170, but the bead will be the same.

I am assuming that if the manufacturing is recommending 4.5 rim width, then the size will be correct when the tire is on a 4.5 inch rim.
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Offline Rev Ryder

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Re: 160/70-17 on Meanstreak Wheel
« Reply #43 on: March 30, 2012, 08:53:39 pm »
No, but, maybe.  :-[

I think since the manufacturer has recommended a 4.5 inch rim, for both, the fat part of the tire will be wider on the 170, but the bead will be the same.

I am assuming that if the manufacturing is recommending 4.5 rim width, then the size will be correct when the tire is on a 4.5 inch rim.
Correct?  Yes.  The same?  I doubt it.  With the different aspect ratios of the two tires they will not ride the same even if they have the same face curvature and are made of identical materials and compounds.
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Offline WillyP

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Re: 160/70-17 on Meanstreak Wheel
« Reply #44 on: March 30, 2012, 09:16:22 pm »
That wasn't what I was saying at all. I am saying that the bead will be the same width, since they were both spec'ed to go on a 4.5 inch wide rim.
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Offline Bergmen

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Re: 160/70-17 on Meanstreak Wheel
« Reply #45 on: March 30, 2012, 09:48:51 pm »
I think this might be getting over-thunk. The bottom line to me is a 160/70 seems to be partnered to the 120/70 front tire almost magically (both being Storm 2 Ultras) to the extent that there are no downsides to the handling of the ZGRX - at all. This is the absolute best handling motorcycle I've ever owned (which isn't saying much since the technology is 25 years old).

Dan

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Offline Dave Scott

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Re: 160/70-17 on Meanstreak Wheel
« Reply #46 on: March 31, 2012, 10:08:45 am »
probably true, Dan, but I just love to over analyze!   :))