Dual purpose tires on a R75/5

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

  1. motog

    motog Been here awhile

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    My R75/5 scrambler project is coming along nicely and now it's time to look at some dual purpose (or dualsport if you like) tires.

    Tire sizes are: 3.25x19 front • 4.00x18 rear.

    I've been doing a lot of looking around and a fair bit of internet research but I've hit a bit of a problem: clearance to the swingarm on the R75/5 is tiny. I'm currently running Metzeler road tires and there is less than half an inch clearance. Putting most dual purpose tires on there may not work. I don't want to shell out money for tires that won't fit.

    Has anyone else done this? What did you use? Any problems with swing arm clearance?

    Background: I probably do 50-60% riding on roads. The road tires are ok on tight dirt or good gravel but are just plain scary on loose surfaces or mud/clay. I'd like to be able to increase the ability to ride on less certain surfaces. I'm not expecting to keep up with the KTMs.

    Any advice gratefully accepted. Thanks

    Jim
    #1
  2. east high

    east high Been here awhile

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    A while back there was a thread about a few dudes on /2s with dirt tires. They were using Shinko 244 and Continental TKC-80.
    #2
  3. khale

    khale ride dirty

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    Don't you know you have to post pics in order to get advice? :evil
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  4. motog

    motog Been here awhile

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    Ok. This is an older pic - much has changed since then, but you get the general idea.
    [​IMG]

    east high: Unfortunately I can't seem to find the Shinkos in Australia but I'll look into the TKC80s. Thanks

    Jim
    #4
  5. Rucksta

    Rucksta SS Blowhard

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    http://www.motorcycletyres.net.au/tyres/safari/index.html

    Have a look at the E07

    129/80 18 clears the swing arm on R65s and R100 fat swing arm so should fit R75
    100/90 19 is not a fat tyre and has a moderately steep Crown Radius Section so your fine control and tip in is not compromised.

    TKC hook up on the edges better on loose surfaces once you start power sliding and are better but not great in muddy conditions.

    The E07 will outlast the TKC are cheaper and handle much better on the road especially in wet conditions.
    It's also much quieter on the road, TKCs are almost as loud as a full knobby
    #5
  6. ed mocz

    ed mocz Kenosha WI

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    #6
  7. ME 109

    ME 109 Long timer

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    For the rear at least, Metzeller enduro 2, 4:00/18 A decent looking lug dual purpose.

    No Metz for the front that I have seen, not to say there isn't one.

    Avon Distanza has 4:00/18, 4.1/18, and 100/90/19 for the front. Not too luggy tho'
    #7
  8. Gillus

    Gillus High Desert Rat

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    Shinko 705 in a 4.10 X 18 and a 110/80 -19. I did not research size changeover but the 705 may work very well for you if it'll fit.
    #8
  9. blaine.hale

    blaine.hale Long timer

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    I run heidenau k60 scouts on my r90. They're great. Not so great in the rain, though.
    #9
  10. chasbmw

    chasbmw Long timer

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    Back in the day I used Dunlop K70s or Goodyear DTs,mthey gave a little more grip on muddy south American roads.

    [​IMG]
    #10
  11. Gillus

    Gillus High Desert Rat

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    :bow
    #11
  12. red bud

    red bud alky w/motorcycle problem

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    avon distannas


    [​IMG]

    [​IMG]
    #12
  13. moosehead

    moosehead Been here awhile

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    Ran a set og Bridgestone Trailwings on my beater 1981 R100...for the backroads

    Worked great on/off asphalt and pretty good in the wet:

    Front 110/90-19 - ran at 36psi
    [​IMG]

    Rear - 120/90 - 18 - ran at 32 psi
    [​IMG]

    [​IMG]

    Were no rub issues front or rear.
    #13
  14. Beemerboff

    Beemerboff Long timer

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    Mitas E07s on the G/S, work fine wet or dry, road and dirt, and last at least 50% longer than anything else I've tried.
    Will eventually have them on everything.

    Dunlop TT100s on the R75/7 & B44 , suprisingly good on gravel roads for what looks like a road tire.

    Distanzas, and Mitas E08s, work great too, but the Avons are $100- a pair more than E08s in Oz, and neither last like the E07s.
    #14
  15. motu

    motu Loose Pre Unit

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    I'm using Dunlop K180's, they are 120-90x18, but they do a 100/90 too. Not as good as the K70 in gravel, but better off road and seriously good on seal and wet roads. But they won't last long, I've lost 2mm in 900km.

    [​IMG]
    #15
  16. motog

    motog Been here awhile

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    Thanks for all of the suggestions. I shall check them out. My problem will probably be clearance on the rear swing arm. Does anyone have an accurate way of comparing the width of the tyre deflated compared to what it will be mounted on the bike and inflated?
    Thanks
    Jim
    #16
  17. gsd4me

    gsd4me 90% bluff

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    That looks a lot like a Continental RB2. Those were the days; no need for any dual sport type bike for a world tour. Just load the roadie up, maybe slap on some aggressive tread tires, and off you go.
    #17
  18. Boondocker1

    Boondocker1 Been here awhile

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    Amen brother... my first "adventure" bike was my dad's CB200 back in 1978... on a bike like that momentum was your friend when running off-road.
    #18
  19. chasbmw

    chasbmw Long timer

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    Unless my memory is totally shot, it's a Goodyear DT. Photo taken at Juliaca in Peru. We had ridden up from Arequipa, dirt roads all the way, approx 300 Km, took 13 hours, snow at the top at around 16,000 ft. The reason why the bike had no front mudguard was that it had clogged up on a muddy stretch of road and locked up the front wheel. 2 up with camping gear. I later sold the bike in Bolivia for over $5000, about twice what I had paid for the bike.
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  20. east high

    east high Been here awhile

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    I'm running Dunlop K70s too.
    #20