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Old 08-06-2013, 10:43 PM   #1
JoshBMW OP
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990 run a 140/80 18 rear?

Can they?
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Old 08-06-2013, 11:09 PM   #2
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It can be mounted. It looks a little weird. But, I've had some customers that do it. The rim is not protected very well. I wouldn't do it.

The 140-18 tire is really meant to be mounted on a 2.5-3.0 in rim. The stock rim on the Adv is 4.5".
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Old 08-06-2013, 11:14 PM   #3
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990 has a 4.25 I think.
I have used a 150 tyre on a 5.0 rim before, without ill effects to handling whatsoever and a 140 tyre on a 4.25 rim sounds less extreme surely. Lack of rim protection though is an issue.
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Old 08-06-2013, 11:20 PM   #4
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Here in Australia alot of us run the 140/80-18 Dunlop rally raid. It's the only size it comes in and I thought it was purpose built for the 950's. It has good traction off road and last a long time on the bitumen roads.
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Old 08-07-2013, 12:22 AM   #5
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yeah I'm using a Sava 18 - 140/80, won't use anything else for the 50/50 riding I do.
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Old 08-07-2013, 01:59 AM   #6
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Just mounted a MT21 in 140/80-18. Looks fine to me.
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Old 08-07-2013, 02:06 AM   #7
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Many Pirelli MT21 and Dunlops 908RR 140/80-18 without any issues.

Dunno even if these are available in higher widths
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Old 08-07-2013, 02:10 AM   #8
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Quote:
Originally Posted by Gustavo.Ramos View Post
Many Pirelli MT21 and Dunlops 908RR 140/80-18 without any issues.

Dunno even if these are available in higher widths
What sort of mileage can I expect from the MT21? Heading on a big desert trip in a few weeks and wondering whether I should stock up on some more rubber
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Old 08-07-2013, 04:04 AM   #9
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Quote:
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What sort of mileage can I expect from the MT21? Heading on a big desert trip in a few weeks and wondering whether I should stock up on some more rubber
Get the 908RR.

For rocky desert trails the big twin will eat the MT21 like a snack:

1000kms:
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Old 08-07-2013, 04:10 AM   #10
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Quote:
Originally Posted by Gustavo.Ramos View Post
Get the 908RR.

For rocky desert trails the big twin will eat the MT21 like a snack:

1000kms:
Crap. Will do, thanks for the advice!
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Old 08-07-2013, 08:22 AM   #11
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140/80 on the back no problems.
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Old 08-07-2013, 10:44 AM   #12
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Thanks for the feed back guys, friends looking at a K60 for a rear and I like the 140 K60 more than the 150 K60.

Not sure what we'll go with yet, just needed options.
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Old 08-07-2013, 11:25 AM   #13
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Technically, a 140 tire is out of spec on a 4.25 rim.

I asked Motoz specifically about this and they will not recommend their 140 tire.

It will obviously mount up on the wheel, and I've run the 140 Dunlop myself. Didn't like it very much, but it went round and round without flying off.
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Old 08-07-2013, 12:10 PM   #14
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`how many threads about this...If you have access to a 150 profile for the 4.25 rim- its a better fit, and better handling. Depending on the brand of 140/80-18 ( widths vary), when mounted on the 4.25 the 140 looses some curvature, it flattens out because the side wall is stretched a bit- you might notice this when you lay the bike over in a turn. Unfortunately there are very limited and mostly expensive choices in the 150 range, which is why I can understand folks searching out he 140's. K60 140 has a little different tread profile, but I would doubt you'll notice much difference in how it hooks up in the dirt. It probably wont last as long as the 150 with the continuous center tread.
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Old 08-07-2013, 04:48 PM   #15
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Quote:
Originally Posted by JoshBMW View Post
Thanks for the feed back guys, friends looking at a K60 for a rear and I like the 140 K60 more than the 150 K60.

Not sure what we'll go with yet, just needed options.
I'm curious what you like better about the 140 K60 than the 150.

I'm quite happy with the off-road behavior of my 150. Both front and rear are not "smooth" on the road, but they get good traction in turns, which is the most important thing to me.


I realized that each size has a slightly different tread pattern, but the 140 looks very similar to the 150 in tread shape.

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