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zebian2
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Seattle
Joined: 09/20/2008
Posts: 20

Here is the size. 100/90-18 (front)
What is your preference since there is a lot of tires that would fit ?
Thank you.
Z

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6866
Front tire prefrence

On my /7, I've been running metric tires, but I think inch-size will be a better choice, since the bike was designed for that. On my /2, I purchased inch-size tires from IRC, 3.50x18 front and 4.00x18 rear...I have the different rear end on my R69S. I like them fine...I'm not an agressive rider. I think I have about 5-6K on the rear so far.

Kurt in S.A.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

Allan.Atherton
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VBMWMO #2709
Joined: 10/27/2006
Posts: 507
Front tire prefrence

"schrader7032" wrote:

... On my /2, I purchased inch-size tires from IRC, 3.50x18 front and 4.00x18 rear...I have the different rear end on my R69S. I like them fine...

On my 1969 R69US, which came with the 4.00 rear tire and compensating 27/8 drive, I went back to the original combination of 3.50 (100/90) and 25/8 drive.

Having used the 4.00 rear tire for years on a couple of bikes, I did not like how it interfered with routine operations by the way it touched the ground when the bike was on the center stand.

With the 4.00 rear tire, the wheel could not be revolved for finding the valve to air the tire, or revolved by foot for adjusting valves, or hung off the ground for removal except by carrying little 1" thick wood blocks to put under the center stand, or removed from the bike without deflating the tire or backing out the shock bolt. When carrying a spare tube in the saddle bag, the rear tire got the tube, leaving out the front.

And on one bike with a worn-down center stand, the rear wheel took so much weight that the stand was partly unloaded and the bike was tippy when parked.

I find it easier to live with the original 3.50 (100/90) rear tire. And one tube fits both ends.

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6866
Front tire prefrence

"Allan.Atherton" wrote:

Having used the 4.00 rear tire for years on a couple of bikes, I did not like how it interfered with routine operations by the way it touched the ground when the bike was on the center stand.

Hmmm...not a problem on my R69S. The rear wheel is well off the ground when on the center stand. Setting valves as you describe is exactly what I do. My center stand and its travel limits must be within spec and not very worn.

Not sure what I would have done in your case. I can see where going with the different tire/rear drive can be one solution. Maybe it's more of a PITA to fix the center stand.

Kurt in S.A.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

zebian2
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Seattle
Joined: 09/20/2008
Posts: 20
Tires

I'm also interested to know what brand name tires is most sought after.
Do you like the Michelin, Dunlop or what about the Cheng Shin?
Please let me know.
Z

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6866
Front tire prefrence

Z -

What's your requirements for the tire? Price, originality, availability, performance (stickiness versus longevity), controllability (rain grooves, etc.)? A lot depends on what you want out of the tire...

BMW used to recommend specific tires in earlier years, though they've gotten away from that. Continentals were what came on my R100/7. Here is a service bulletin from 1968 that specifies size and type of tire:

http://www.beemergarage.com/documents/243.pdf

I've run Bridgestone, Dunlop, Continental, Pirelli, Metzeler on my /7 and really can't tell much difference. Probably due to my "milk-toast" way of riding. It has been said that the ribbed Continental (or any tire with a tread pattern that runs parallel to the circumference of the tire) will hunt rain grooves and provide an uneasy feeling. I never really found that to be too much of a problem...hmmm, maybe I didn't ride on grooved roads much?? The Metzeler is better is that regard. I used to get pretty lowsy mileage out of rear tires (I consider 6K not very good) from Bridgestone, Conti, and Pirelli. However, the Dunlop I have on the read know is pushing 13K miles and still has thread left. On the down side, it doesn't grip as well and maybe be touchy in the rain...I've not had a problem in that regard.

Any of the tires you mention would be fine. As I said, it really comes down to "what works for you".

Kurt in S.A.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

zebian2
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Seattle
Joined: 09/20/2008
Posts: 20
Front tire prefrence

"schrader7032" wrote:

Z -

What's your requirements for the tire? Price, originality, availability, performance (stickiness versus longevity), controllability (rain grooves, etc.)? A lot depends on what you want out of the tire...

BMW used to recommend specific tires in earlier years, though they've gotten away from that. Continentals were what came on my R100/7. Here is a service bulletin from 1968 that specifies size and type of tire:

http://www.beemergarage.com/documents/243.pdf

I've run Bridgestone, Dunlop, Continental, Pirelli, Metzeler on my /7 and really can't tell much difference. Probably due to my "milk-toast" way of riding. It has been said that the ribbed Continental (or any tire with a tread pattern that runs parallel to the circumference of the tire) will hunt rain grooves and provide an uneasy feeling. I never really found that to be too much of a problem...hmmm, maybe I didn't ride on grooved roads much?? The Metzeler is better is that regard. I used to get pretty lowsy mileage out of rear tires (I consider 6K not very good) from Bridgestone, Conti, and Pirelli. However, the Dunlop I have on the read know is pushing 13K miles and still has thread left. On the down side, it doesn't grip as well and maybe be touchy in the rain...I've not had a problem in that regard.

Any of the tires you mention would be fine. As I said, it really comes down to "what works for you".

Kurt in S.A.

Kurt.
Thank you for your awesome contribution to this board in general and for always answering my questions.
Z

Allan.Atherton
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Joined: 10/27/2006
Posts: 507
Front tire prefrence

"schrader7032" wrote:
"Allan.Atherton" wrote:

Having used the 4.00 rear tire for years on a couple of bikes, I did not like how it interfered with routine operations by the way it touched the ground when the bike was on the center stand.

Hmmm...not a problem on my R69S. The rear wheel is well off the ground when on the center stand. ..

It must just be that way with the two R69US I had and have. Maybe the telescopic fork extends so far on the center stand that it supports the front end and puts the rear wheel on the ground.

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