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13" tires; bane or boon?(just bought 155 R80-13)

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  • 13" tires; bane or boon?(just bought 155 R80-13)

    I picked up a set of Kuhmo SOLUS KR 21 155R80-13 tires(640 treadwear, traction A, temperature B 85,000 mile guarantee; a good near top of the line Chinese made tire) yesterday and drove to Seattle and back that afternoon and evening(about 180 miles) then this morning after some rain later last night after I got back.

    I let the salesman talk me out of even thinking about the same tire in a 175R70-13(which would've cost considerably more I'd of gladly paid) he'd told me would hydro-plane more easily, and have less control during a skid while braking.(he'd referenced European rally tires for wet weather being characteristically much narrower...)

    This morning I had an experience braking while making a quick turn into a parking lot off a major arterial,(deciding on my move at the last instant) where I'd gone into a skid though at a slow speed-due to standing water on the mostly dry pavement; leading me to think the arguments for getting these really narrow tires bogus.(They replace a set of Toyo SPECTRUM 155R80-13s that though the same size feel appreciably wider; with the Kuhmos having a more skittish feel even at the 30 psi the dealer inflated them to,[compared to 42 front and 38 rear unless heavily loaded with the Toyos-which wore perfectly true and even, so reasonable as the proper enough inflation!] also noticeable on the freeway coming home as I'd been tired and more apt to allow the car its own head)

    I'm really bemoaning my decision now, since in retrospect though I'd thought myself willing for economy both in purchase price and gas mileage(we all love those fantastic mileage figures) to go with 155R80-13s, now I'm thinking not only of crucial handling characteristics cornering, braking and stopping, but the two major mountain passes east of Seattle and the north-south highway between them on the other side of the mountains which are roads all thoroughly trashed by studded tires and the huge volume of interstate trucking, skiers and other varied types of traffic often heavy though relatively wide open spaces; where driving in the Festiva with the Toyos was unbearable due to the heavy surface damages to the roadway, exhausting after even a few minutes to have to endure if one has been traveling interstate; which I'm certain would improve a great deal with a wider tire.(and the much better ride and control generally traveling on the open road I seem to do plenty of, or streaming fast large urban freeways often seemingly at least bumper to bumper well over 70 mph; both of which are likely much more tiring and exhausting with narrower tires?)

    I also noticed coming back from Seattle with the wind wiped up pretty strongly I was feeling buffeted around more than I seemed to feel with the Toyos; and which also seems as if something wider tires would greatly improve upon too.

    The reason I was so easily led to buy as I did, besides the economic factor; was an experience October of 2003 driving from Eureka, CA to Olympia, WA when the weather had been particularly nasty, raining heavily through Portland and north of there so that some where between Kelso, WA and Toledo, WA which is a fast stretch of often little traveled 70 mph freeway on I-5; I'd been bipping along around three in the morning during a heavy rain with the road all to myself at about an indicated 80 mph or as I reckon 82 or 83.

    I'd felt fully in control, but was terrorized when I noticed the speedometer's needle jumping I'd never seen before I'd at first thought a slipping clutch which happened once before though without the speedometer needle jumping, so that after stopping at the famous Toutle Creek rest area(once buried under Mount Saint Helen's ash) to adjust my clutch, the idea soon dawned on my refreshed by the stop brain, and hands on think through of the clutch system; that clutch slippage couldn't possibly make the speedometer needle jump which the only option for was wheel spin from slippage with my foot nearly to the floor on the throttle as I hydro-planed.*(funny story; at world famous Seattle jazz vocalist Ernestine Anderson's 80th birthday party two nights ago 11/10/08[whose arranger and pianist the late Jack Percival, as a '76 music student in exchange for lessons, I used to copy parts for] I'd taken twenty minutes to figure out 13% of the two dollars paid for coffee that night for a tip, two times thirteen, duh!: Since playing flute occasionally with the jazz combo while a singing waiter at Many Glacier Hotel in GLACIER NATIONAL PARK in Montana in '75, I've always tipped the 13% we were told to tell customers was an appropriate amount; which is a little cheap and about what I can afford always so despite the strain to the brain doing the math, this has been my habit a challenge most of the time to figure out...try it sometime, but don't blame me if you get a plate of rainbow trout or a pot of coffee in your lap, eh?)(there was a guy working his way through Harvard law school, known for such antics when stiffed...I'd guess sang off key?)(you can tell the really good mathematicians since they don't ever wear shoes...come on, thats easy; you can count all the way to twenty!)(hey Ernestine, if you were a grandmother in your mid '50s in '76?)(trumpeter Miles Davis, now deceased, had a composition called "Eighty One" I guess was to reflect on what was called "the eighty first lash" meaning you could take eighty, but on the eighty first assuming means you'd draw lethal blood from a jugular, commence the revolution, commit suicide or whatever; and I remember reading too somewhere, that if you are a really savvy person with math and likely another science or two, you can demonstrate that everyone in the world is eighty first cousins...hey, now everyone in the place has their shoes off!!!)

    So, now I'm wondering if in fact there would be a greater tendency to hydro-plane with 175R70-13s and if they will corner any worse in wet weather, brake less effectively or in any other way be inferior to let alone greatly exceed what the 155R80-13s have to offer.(I'm also deeply convinced there is a sort of capitalist "status" pecking order in effect; the constant abuse at every turn, where as someone on assistance I'm discouraged from having what is perceived as the finer experiences available in life not to mention more or less the tendency to euthanization I perceive as either a defacto event or covert design; like looking along the horizons and sighting the distant enemy much more powerful than yourself you hope you can avoid drawing notice from, like a lizard already less a tail)

    *I did get a speeding ticket for 80 in a 55 zone on the barren two lane highway along the north shore of the Columbia quite aways west of the Tri-Cities(Pasco, Kennewick and Richland, WA) early in December of 2005; when the cop and I were the only vehicles either of us had seen in the past half hour though in the middle of the afternoon, so that though seeing the squad car pull out after me from his speed trap just past a rise in the road I crested, I only slowed by barely perceptible increments just to show some attitude knowing I was caught and that he should try to find better things to do with his time than abusing a citizen more than willing to abide by the intent of the law-deserving of the right to blow out a little carbon; which in fact was somewhat the case since he could've nailed me for going 100 mph-if he'd thought anyone would've believed him at least and which he may've been doubtful of perhaps I'm not so sure about myself over such a distance in time-though we both knew 80 was much less a rent to my pocket book than could've been allowed.(I used to be real savvy about instantly dropping down a gear or two to slow rapidly without a flash of my tail lights and the cop even wondered why I'd not done so then thinking me a sporting veteran of the road, who he could've let off with maybe only a warning had I shown more of an attentive respect I guess is within reason to think would be a good reward for my thus demonstration of precise attention and control though decades since my joy in simply being behind a wheel has promoted such a state of mind which is a good measure of how really far from the prevailing culture of automobiles my head is anymore so that I easily recall thinking as many as fifteen years or even a few more ago that I'd never be able to learn the driving skills I have accumulated given the society I most pursue to be a part of now;[NYC's vs. LA's styles?] while also reflecting on the difficulty of learning to drive well generally and what a huge segment of anyone's attention and resources this demands with such immense liabilities to oneself and if you are not too concerned about that individual; at least maybe others of the chance cooperative collectives of the road?)
    Last edited by bobstad; 11-12-2008, 10:09 AM. Reason: clarity, punctuation
    '91 Festiva L/'73 Windsor Carrera Sport custom

    (aka "Jazz Bobstad," "The BobWhan," etc.)

    Art is the means whereby(a) society advances: Religion is the definition of the parameters of art. Poetry is the actualization of these...

  • #2
    Readers Digest Version

    Originally posted by bobstad View Post
    I picked up a set of Kuhmo 155R80-13 tires yesterday and drove to Seattle and back that afternoon and evening(about 180 miles) then this morning after some rain later last night after I got back.

    I let the salesman talk me out of even thinking about the same tire in a 175R70-13. He'd told me they would hydro-plane more easily, and have less control during a skid while braking.(he'd referenced European rally tires for wet weather being characteristically much narrower...)

    This morning I had an experience braking while making a quick turn into a parking lot where I'd gone into a skid though at a slow speed-due to standing water on the mostly dry pavement; leading me to think the arguments for getting these really narrow tires bogus.

    I'm really bemoaning my decision now to go with 155R80-13s.

    So, now I'm wondering if in fact there would be a greater tendency to hydro-plane with 175R70-13s and if they will corner any worse in wet weather, brake less effectively or in any other way be inferior to let alone greatly exceed what the 155R80-13s have to offer.
    If you didn't want to read the whole thing, I think I summarized it and extracted the overall question/ statement fairly well.

    I still don't understand how or why you would want to type sooooo much Bobstad. (But I applaud you for it)
    Steve GT

    Comment


    • #3

      Overall, looking at the tire tread design (disregarding any size)
      After the shoulder of the tire just before the intermidiates, there is a large rain chanel to rid the tread of water. But since you said the the slide happened in a parking lot, leads me to think that there was some type of spill -oil, anitifreeze, seafoam ect- mixed in with the water. I hate parking lots, working with sportbikes, i've seen a bunch of riders eat it with new tires in parking lots just from sliding out (on dry pavement).

      Comment


      • #4
        At 30 psi, I'll almost guarantee you that when you turned the steering wheel, the tire "rolled" over partially onto its shoulder. 35psi cold would be my recommendation. Now combine the tire rolling over and Gene's probable correct call on the "slick", I can see why you slid.....least I think that's what I read before I quit reading the novel. And yes, I used to own a tire shop, so I think I qualify to give my opinion.
        ENFORCER - Midwest Festiva Inc., Iowa

        #1 '90 Sport to modified Lx - RollazX
        #2 .....Cheesehead
        #3 '91 White - Donor Car
        #4 .....Montana Project
        SOLD----Levistiva for $1500
        Bought her back for $450
        Now that's darn near priceless!!

        Comment


        • #5
          Sorry about so much verbosity!

          Hey,

          I guess I should've dropped some of that long dialogue, because I sort of lost anyone before they got to the second part of my question. Which is what sort of an advantage might I find with the 175R70-13 tires versus the 155R80-13s?

          Yeah, I did get carried away on this one, obscuring the point where the driving impressions of the old set of Toyos I just changed from, which were so impossible to endure on the studded snow tire pummeled roads in the more mountainous areas of the state. I'm nearly convinced that 175R70s would be much more comfortable in those extreme conditions and also handle better generally too.

          I'd had a set of Toyos that size all mounted and sold when I ended up with the old set of 155R80-13s, but the rear tires rubbed on the rear struts, so they couldn't be used.

          Now I have the Aspire rear axle, which I guess is supposed so accept the wider tires, though just looking with the old Toyo 155R80-13s there didn't seem to be that much more clearance to me.

          So, I guess the big point of my question buried somewhere there in all my unrelated or even related anecdotal stuff; is will a 175R70-13 have any greater tendency to hydroplane than the 155R80-13; and/or brake less controllably in a skid; or generally handle less well in wet weather: All of which were claims the salesman used to effect in selling me the 155R80-13s, which are skinny little tires hardly wider than the original 12" tires; that I'm now on my third set of figuring I might've greatly advantaged myself should the wider tire now fit since I've gotten the Aspire rear axle.(I do have FMS racing/lowering springs, which may reduce clearance for wider tires in front?)
          Last edited by bobstad; 11-13-2008, 06:08 AM. Reason: added word "which" before "...were so impossible to endure..."
          '91 Festiva L/'73 Windsor Carrera Sport custom

          (aka "Jazz Bobstad," "The BobWhan," etc.)

          Art is the means whereby(a) society advances: Religion is the definition of the parameters of art. Poetry is the actualization of these...

          Comment


          • #6
            Don't miss this part!

            Originally posted by bobstad View Post

            So, I guess the big point of my question buried somewhere there in all my unrelated or even related anecdotal stuff; is will a 175R70-13 have any greater tendency to hydroplane than the 155R80-13; and/or brake less controllably in a skid; or generally handle less well in wet weather: All of which were claims the salesman used to effect in selling me the 155R80-13s, which are skinny little tires hardly wider than the original 12" tires; that I'm now on my third set of figuring I might've greatly advantaged myself should the wider tire now fit since I've gotten the Aspire rear axle.(I do have FMS racing/lowering springs, which may reduce clearance for wider tires in front?)
            I'm repeating this section of my just entered reply post to my own thread here, to emphasize the question. Thanks for enduring through my literary efforts...I kick it around the apartment when I should be tidying up the place instead.

            I also am thinking I should remember to ask about the wider tire's advantages in heavy winds, which I guess could greatly stabilize the car?
            Attached Files
            '91 Festiva L/'73 Windsor Carrera Sport custom

            (aka "Jazz Bobstad," "The BobWhan," etc.)

            Art is the means whereby(a) society advances: Religion is the definition of the parameters of art. Poetry is the actualization of these...

            Comment


            • #7
              I think the diference in the two tires (155R13, 175/70R13) is that the height is almost the same-er 1/16" but the width is where the major differnce lay- about 3/4".

              With such low differeces it most likly is the tread design that will affect wet weather handling. That Kumho that have, looks like very nice riding and quiet tire with all the voids in the tread. He could have sold you a tire that had maybe a little bit more of higher void ratios to channel away water. As looking at the center and the intermidiates of the tire where the lugs ad voids are very close, it provides a lot more rubber to come in contact with the pavement.

              (voids are spaces between lugs that allow the lugs to flex, lugs are the parts of the tire that acutually touch the road surface)

              A tire like this would have worked a little better for you in wet weather:

              Comment


              • #8
                For $30 each plus a host of additional charges, fees and taxes; I guess I can live with these tires awhile.(when I complete the Aspire brake swap I'm told any Honda Civic rim will bolt up, so I may try to find at least a pair of those with the 175R70-13s to play with; to see how they fit on both the front and rear, etc.)

                This was at DISCOUNT TIRES and the least expensive tire they sell; whose only real offense to my mind was to imply when I'd stopped by a month earlier that the lifetime road hazard guarantee came with the $192 out the door price; that they charged $20 extra for, though with the verbal assurance at least this is honored even if some punk slits a tire to express themselves disdainfully.(as happened with an ex-con I'd picked up off the street and tried to help by sheltering him a couple days whose only motive to've sought my society in the first place was to provide as contentious an experience as feasible while honing his skill at stealing and mooching I got victimized by for my kindness and curiosity of the world...)
                '91 Festiva L/'73 Windsor Carrera Sport custom

                (aka "Jazz Bobstad," "The BobWhan," etc.)

                Art is the means whereby(a) society advances: Religion is the definition of the parameters of art. Poetry is the actualization of these...

                Comment


                • #9
                  Nice grill mod (Chevy), lol.
                  Steve GT

                  Comment


                  • #10
                    hey,

                    I think I'm digging my new tires a lot more!!!

                    I drove to Seattle and back with 38 psi in the front tires instead of 30 psi; and 35 psi in the back instead of 30 psi there too.

                    I had quite an adventure too, right in downtown Seattle as everyone was getting off of work; when the bottom radiator hose blew off.

                    This is narrated in detail in the General Discussion Forum; which though a little bit musically oriented really is almost all automotive, and a real thriller-diller!
                    '91 Festiva L/'73 Windsor Carrera Sport custom

                    (aka "Jazz Bobstad," "The BobWhan," etc.)

                    Art is the means whereby(a) society advances: Religion is the definition of the parameters of art. Poetry is the actualization of these...

                    Comment


                    • #11
                      You may have solved your issue. I have the 175/70 Toyos on my car and I love them, but have had good results with the Kumhos as well. These little tires seem to be much more touchy in regards to pressure than the 20 inchers on my truck. I run 38 front and am still experimenting with the rears. I do experience rubbing with these tires though...but only under turns with a bump on the front, and hard bumps...like a rough gravel drive, in the rear. Technically a wider tire would hydroplane easier, which is why some guys on the "Power Tour" have issues in the rain..but I wouldn't think the minimal increase in size would have caused a problem, but then again, I'm no expert. I will tell you, however, that we had heavy rain yesterday morning and I had no problems what-so-ever at hwy speeds or slow entrys into parking lots, or navigating parking lots. Could have just been a "perfect storm" effect with a mix of water, lower tire pressure, and a slurry of chemicals from the parking lot as has already been suggested.

                      Donovan

                      92 Festiva L stock with wheel upgrade...The Mater (Sold)
                      '66 Galaxie 500 428 FE...Friend of OPEC
                      '68 Mustang Coupe
                      '63 Galaxie Country Sedan

                      Comment


                      • #12
                        I run 50psi all around. I have bridgestone insignias on the back, 155-80-13 with pretty low tread, and "Sonar" 175-70-13 on the front, with good tread. Of course, theyre junkyard tires so I dont care how they wear. If I got new tires, I would probably run the max sidewall pressure.
                        91GL BP/F3A with boost
                        13.79 @ 100, 2.2 60' on 8 psi and 155R12's

                        Comment


                        • #13
                          Where the rubber(s with studs in 'em!) greets the roadies

                          bhazard goes to my heart; speaking of "junkyard" tires.(one of the reasons I'm running 13" rims)

                          From '82-'94 the dozen years I mostly spent living out of a '66 VW square-back sedan(type III) I had to survive on used rubber, carefully replacing the tires one by one as the steel belts would begin to peek through the tread.

                          Much less economically efficient than buying new; but necessary to my limited, heavily repair and maintenance driven economy with the VW whose motor I rebuilt four times myself; and which also had a total of three trans-axles in its lifetime with me.

                          Eventually sold for $200 with a fresh trans-axle* and recently rebuilt motor, to Spokane's Todd Molyneux**, a compelling youth and aspiring musician who also was a local music promoter.(with his own VW wrecking yard; who'd planned on using the tran-axle out of my beloved VW in one of his other rigs then)

                          *That trans-axle was one I'd installed in two nights using a flashlite and kerosene lamp; August of '94 in the parking lot of STUDIO 321 at 321 Jefferson Street in Olympia, WA(a small former state office building on the waterfront then an occasional performance venue also a warren of small artist/musician office & rehearsal cubicles) when the hundred and four day time temperatures had made working in that heat impossible for me.

                          The $300 trans-axle itself was also interesting I'd seen an ad for in the east bay publication THE CLASSIFIED FLEA MARKET want ads; which was from a never run, never completed Ghia type III project car which was to've been a dragster, the owner hadn't worked on for seven years he was parting out which had languished in his El Cerrito, CA basement; who as a professional musician had started picking up gigs which thus had kept him from completion of the race car.(who drove an older Mercedes four-door smaller size sedan; a forest green shade looking at just after sunrise or before sunset hue)

                          **Todd's parents, who both died in his youth had been the criminal couple depicted in the book and movie THE FRENCH CONNECTION to whom he was born after those events; his father interestingly a friend of dragster building super hero of the entirely weird Tommy Ivo; whose four-Chrysler hemi-engined fully functional monstrosity remained riveted in my memory banks.(from the odd HOT ROD magazine I'd glance through with disdain when as a teen miscreant I'd been enamored of my big three of wasted youth reading materials, ROAD AND TRACK, CAR AND DRIVER and the long defunct SPORTS CAR GRAPHIC I'd then thought likely more socially exclusive than such entirely American car culture icons as HOT ROD, CAR CRAFT, etc.)
                          Last edited by bobstad; 11-15-2008, 11:43 AM.
                          '91 Festiva L/'73 Windsor Carrera Sport custom

                          (aka "Jazz Bobstad," "The BobWhan," etc.)

                          Art is the means whereby(a) society advances: Religion is the definition of the parameters of art. Poetry is the actualization of these...

                          Comment

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