Dual purpose tires on a R75/5

Discussion in 'Airheads' started by motog, Mar 28, 2013.

  1. gsd4me

    gsd4me 90% bluff

    Joined:
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    7,944
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    I'm guessing that as you fitted the tyre, you're more than likely correct. I never ran Contis on my airheads, they never looked like they had enough tread. Metzeler Block C on the front was popular for dirt, with a long wearing and good handling Avon Roadrunner on the rear. Good handling that is until they squared off on a trip across the Nully.

    Doing a quick trip from Perth, across to the Eastern states and back, a Japanese Dunlop was usually used. $19.90 supplied and fitted (c1979); these were well and truly stuffed at the end of it all.
    #21
  2. gsd4me

    gsd4me 90% bluff

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    How do they last with sustained high(ish) speed?
    #22
  3. motu

    motu Loose Pre Unit

    Joined:
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    I used to run mine at 20 front, 25psi rear, but a bit more pressure and they will last longer - they are a pretty soft compound, the old traction/wear thing. Problem with the K70 is the rain groove and half the cross grooves aren't full depth, so at half worn they are nearly gone, and so has the gravel traction. Actually you can control traction with the throttle, where it goes pear shape is engine braking - chop down a gear on corner entry and all traction is gone.

    I have no idea how long mine lasted - well, 4 years, but I have 2 sets of wheels, so mileage is unknown. But by this stage they were not a lot of fun.

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    #23
  4. brittrunyon

    brittrunyon R 100 GS F 650 GS

    Joined:
    Oct 6, 2010
    Oddometer:
    645
    Location:
    The High Desert of New Mexico
    Not to hijack.....................but

    I too am looking for dual purpose tires but for a 1981 R100.
    I live in Northern New Mexico where dirt, gravel and forest service roads are unavoidable.
    Pavement 70%, off-pavement 30%.
    Here's the "new to me" bike.

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    So, moosehead, you had "no" problems mounting the larger than recommended tire sizes?
    What's the advantage to the larger size? What's the disadvantage?
    How's the mileage?
    At this point,
    I would go with 110/90 - 18 rear
    &
    100/90 - 19 front

    Motog...............Thanks for starting this thread!
    #24
  5. Sniper X

    Sniper X De Oppresso Liber

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    Location:
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    I put Dunlop K70s on my 1970 R60/5 and they worked great in snow, dry, mud, rain, and dirt. I never MXed the thing but they were great in everything I rode the bike in.

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    #25
  6. east high

    east high Been here awhile

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    Portland, Oregon
    I can't say. I've been up and down the interstate and had the bike over 90mph a few times with them. I think the original suspension had more to do with any crappy handling characteristics than the tires. I'm happy with the k70s for the type of riding I do.
    #26
  7. Jim Day

    Jim Day full manic mechanic

    Joined:
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    I just put up a thread about this.

    I'm running Dunlop K70s on my R75/6 a 3.50x19 front, 4.00x18 rear

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    Here's essentially my review http://www.advrider.com/forums/showthread.php?p=21083447#post21083447


    I love them, used to ride on them back in the day, just bought my first set of then new ones. They are great tires, better then I had remembered. They do well on dirt, gravel roads, as well as on pavement. I wouldn't necessarily call them a true duel sport tire, or stick them on a GS, but for your bike I'd say they are pretty perfect. Since we don't have much mud out here I'm not running them in muddy conditions. If I did I imagine I'd have to raise the front fender.

    I'm not sure what your going to be riding on but if I'm reading you right I think you'll be pretty pleased with that tire. You may want to consider increasing your front tire size to 3.50 for more grab on dirt, and I think the larger tire planes up better on the soft stuff.



    Then again if you want a true dual sport tire.... I really like Shinko705s. I put them on my R65 bobber/chopper project (just the front in this pic)

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    That tire rides well on pavement, comes in sizes that will fit your bike, looks incredibly cool, and it will out perform your bike on dirt, on gravel, or off-road.

    I can ride that bobber almost anywhere with those tires. It's only ground clearance that slows me down. My buddy Walt a true Dual sport aficionado got so excited when he saw mine, he instantly bought a set for his KTM. He's always riding offroad and loves them.
    #27
  8. garthg

    garthg Been here awhile

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    Location:
    United States NorthEast
    $150 the pair from Chaparral Sports. In stock in BMW sizes.
    #28