Will it tire fit?

Discussion in 'Old's Cool' started by LSGiant, Jan 19, 2011.

  1. LSGiant

    LSGiant Long timer

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    I have a 1977 Honda XL 350 with I believe a 4" rear rim

    The bike currently has a 110/80 18 rear tire

    I would like to put on a 130/90 18 Dunlop 660

    Am I dreaming?
    #1
  2. IHWillys

    IHWillys Been here awhile

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    My '75 XL350 has a 4.60-18 CS C858 on the rear. Not much more room there, stock was 4.10-18, IIRC. I don't know how these sizes compare to the metric you mention. I don't think the bead to bead width is 4", though I don't recall the width.

    Ken
    #2
  3. sporthog93

    sporthog93 Sporthog93

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    130/90 converts to 5.00/5.10, I think its possible you might have enough room
    #3
  4. Bigger Al

    Bigger Al Still a stupid tire guy

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    That wheel is too narrow for the 130-series tire. Your wheel is not 4" wide if it's stock, and my guess is that it's either 1.85" or 2.15". The 120/90-18 D606 might fit, but it'll be a squeeze, IMHO.
    the stock tire size was a 4.00-18, and there are some of those available, namely the Shinko 244, IRC GP-1, and the Kenda 270. Granted, those aren't necesarily in the same quality range as the D606, but they will work.
    #4
  5. Tosh Togo

    Tosh Togo Long timer

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    No... that's more like a hallucination. Despite what the cruisernobs think, way-bigger tires are rarely a good idea.

    :clap Yup. What 'e said.
    #5
  6. LSGiant

    LSGiant Long timer

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    Thanks

    Yes it is a stock wheel thanks for the correction on width.

    By squeeze you mean getting it mounted on the rim?
    #6
  7. Bigger Al

    Bigger Al Still a stupid tire guy

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    Getting it mounted will be a chore, as the D606 has never been known to be a soft, pliable carcass to work with. What I mean be a squeeze is that the beads will be tough to get seated properly, and once they are, the profile of the tire will be pinched in at the sidewalls. This will give you a very triangulated tread profile which will make the bike want to fall into corners, and possibly lead to a bit of an unstable feeling going down the road. The proper size of tire will allow the tread to maintain it's shape and work for you when you need to have good traction.

    The 120/90-18 and the 4.00-18 are roughly the same size, with the 120 being just a bit larger. Of course, there are also differences to deal with between brands of tires. Some are wider or narrower than others, even with the same tire size stamped into the sidewalls.
    #7
  8. mykill

    mykill odd

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    What are you trying to gain?
    Squeezing a fat tire on a skinny rim on a small bike only seems to make a funny looking bad handling bike. You will be better served by impressing your friends with how fast you go on those skinny stock tires than with your mechanical prowess for shoving a gaint tire on a small bike.
    #8
  9. LSGiant

    LSGiant Long timer

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    Not tryiing to impress anyone. For the riding I plan to do with this bike the D606 is the tire with the best reputation. Sadly it does not come small enough to fit this bike.
    #9
  10. mtiberio

    mtiberio Adventurer

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    #10
  11. mudgepondexpress

    mudgepondexpress Long timer

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    If you want the right look, stick with the 4.00 * 18 trials type tires. You can probably get a 4.50 on there (4.60 will be shorter but the same width), but don't go any bigger. The early XL's look wierd with the *.10 sided tires since they are roughly an 80% aspect tire (4.10, 4.60, 5.10). The *.00 are 100% aspect tires (4.00 wide / 4.00 high sidewall, 4.50/4.50, etc).

    People will shun me, but I truely love the Cheng Shin C-858 on these older enduros. Still comes in most sizes and works great off road or on.

    If you want real traction, get the 4.00 Competition Trials tire, but be prepared to change it often.

    Kenny
    #11
  12. skorpioskorpio

    skorpioskorpio Been here awhile

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    These are my '72 XL250s (basically the same as a 350, but in the early models were an inch shorter in the swingarm). Those are 140/80/18 Pirelli AT Scorpions on the back (90/90/21s in the front). They are mounted on (non-stock) 2.75x18 D.I.D. NOS rims laced to the stock hubs with the offset pushed gear side by 1/4" to clear the bulge in the swingarm for the brake stay (fronts are also non-stock NOS D.I.Ds measuring 1.85x21). Stock wheels are 2.15x18 rear and 1.60x21 front. That is basically the limit of what you can fit on one of these bikes in the rear. Chain guard is not an option and neither is full forward on the adjusters. The one hub came off of a 2.15 wheel with a 5.10 Yokahama Super Digger, and the other hub came from a 2.15 wheel that had a 110/100/18 Dunlop knob, both of these were tight fit tires as well, not quite as wide but as tall both being square aspect tires on the narrow 2.15 rim and 5+ in. wide.

    [​IMG]
    #12
  13. LSGiant

    LSGiant Long timer

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    Those bikes are gorgeous.

    I am going to try to get the 120/80/18 on my stock rim.

    The bike is currently shod with 110/80/18 Michelin MT21 full of ice screws.

    The front is a Dunlop that I got free with the bike. 90/90/21

    Thanks everyone for the help.

    One more winter derby and then get her set up for spring.

    [​IMG]
    #13
  14. mykill

    mykill odd

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    I just re-read my post and realized I sounded like a bit of a dick. My apologies. In my defense I seem to run into far too many peeps who think they will improve their bike by spooning on bigger tires. I too have run into the lack of the right size for a small or old bike. It is frustrating.
    #14
  15. skorpioskorpio

    skorpioskorpio Been here awhile

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    Brrrrrr! Yea, I remember snow, grew up in the midwest. Now I live in SoCal and the thought of ice screws give me a bit of a chuckle. BTW, the 140s I have on my bike would:

    A) never fit as a full knob
    and
    B) really never fit with screws

    I don't think you'd have a problem with 120/80s at all as that is smaller tire than what came off of either of my rims. I have a spare set of original sized rims with the knobs and my "dirt gear" on them. I belive the Dunlops I had are D606s 80/100 front and 110/100 rear. Interestingly the 140s I have are rated for a 2.75 minimum rim width but some KTMs come with Pirelli 140/80s (different pattern) on 2.15s.

    Personally I put the tires I did on the bikes because I wanted something that looked like it belonged on the bikes, had a good center contact area for street (a full knob has probably less than 10% contact on pavement and will look like a WWII jeep tire in a couple hundred miles on asphalt and concrete, these have more like 90%), was similar in size to what modern bikes of this weight wear, can do an occasional fire trail (we have lots of both fires and trails in SoCal), and can let me tease the chicken strips in the canyons (I'm less than 2 miles from Mulholland Drive, a road with more curves than a Mae West look a like contest and the best rider on a Ducati will never find a use for the top 2 gears).

    This kind of tire in a 120/80 would have looked dumb on this bike, it would have looked really whimpy and they don't make a 130 in this tire. The early XLs are kind of bull doggy looking, look great with full knobs, impractical for a bike that will see very little wet ground, hell we don't even put water in our river but a couple times a year:rofl.

    Having two of them affords me the luxury of having a before and after shot in a single photo:

    [​IMG]
    #15
  16. LSGiant

    LSGiant Long timer

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    No offense taken. Need to take everything with a grain of salt on the interweb. It is the price you pay for asking for free information. :)
    #16