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Old 03-31-2013, 05:10 AM   #16
motog OP
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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
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Old 03-31-2013, 11:03 AM   #17
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Originally Posted by chasbmw View Post

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.
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Old 03-31-2013, 11:30 AM   #18
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Originally Posted by gsd4me View Post
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.
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.
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Old 03-31-2013, 12:48 PM   #19
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Originally Posted by gsd4me View Post
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.
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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Old 03-31-2013, 02:45 PM   #20
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I'm running Dunlop K70s too.
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Old 04-01-2013, 01:19 AM   #21
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Originally Posted by chasbmw View Post
Unless my memory is totally shot, it's a Goodyear DT.

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.
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Old 04-01-2013, 01:22 AM   #22
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I'm running Dunlop K70s too.

How do they last with sustained high(ish) speed?
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Old 04-01-2013, 03:49 AM   #23
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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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Old 04-01-2013, 07:09 AM   #24
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Quote:
Originally Posted by moosehead View Post
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


Rear - 120/90 - 18 - ran at 32 psi




Were no rub issues front or rear.
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.



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!
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Old 04-01-2013, 08:55 AM   #25
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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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Old 04-01-2013, 09:32 AM   #26
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Originally Posted by gsd4me View Post
How do they last with sustained high(ish) speed?
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.
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Old 04-01-2013, 11:33 AM   #27
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Originally Posted by chasbmw View Post
Back in the day I used Dunlop K70s
I just put up a thread about this.

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


Here's essentially my review http://www.advrider.com/forums/showt...7#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)



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.

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Old 04-02-2013, 05:39 AM   #28
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Dunlop K70's are also Cheap!

$150 the pair from Chaparral Sports. In stock in BMW sizes.
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