Double Darkside? - Page 34 - BMW K1600 Forum : BMW K1600 GT and GTL Forums
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post #331 of 371 Old 06-27-2019, 10:14 AM
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  • Could it just be the tire? I don't feel the "tipping point" with a BFGoodrich g-Force COMP-2 A/S XL.

    Sketchiest it ever felt to me was today, for about 20 miles en-route to the Mississippi River, where they had ground grooves into the road in preparation for a new layer. Initially felt like I was off road, with ruts moving me where they pleased. I played with it a little, and just stopped caring. Even swerving side to side or going no handed; that little bit of play wasn't hurting anything. Approaching 4,500 miles since the change; and I remain in love with it!

Definitely. This is the BFG g-force I have on the Rune. Notice the very rounded edge (almost like a motorcycle tire at the edge), one of the reasons I picked this tire when I went darkside on the Rune more than a decade ago. It is also an ultra-performance summer tire, so super-soft and sticky. It works magnificiently on the Rune, but no 195/55R17 available for the K1600:




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post #332 of 371 Old 06-28-2019, 05:03 AM
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Originally Posted by phat6 View Post
195/55R17?
Does that size eliminate the need for the spacer? I ask because it seemed the vast majority went with the 205/50-17. Otherwise, why that size?
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post #333 of 371 Old 06-28-2019, 10:06 AM
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Does that size eliminate the need for the spacer? I ask because it seemed the vast majority went with the 205/50-17. Otherwise, why that size?

Yes, that is the point of that size: it fits without a spacer. It does not move the centerline of the tire off of the centerline of the bike. But not many choices for tires in the size.

Would have gone with the same tire I have used on the Rune for a long time, if it was available in 195/55R17.




Another reason it may feel so much more compliant on the Rune: the Rune is a lot heavier bike, so there is more weight to compress the sidewall when cornering, compared to the K1600.
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Last edited by phat6; 06-28-2019 at 10:08 AM.
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post #334 of 371 Old 06-30-2019, 08:44 PM
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You might want to experiment with different tire pressures to address the squirminess.

Had pumped it up to 42 psi while the tire was still warm, after my initial ride, knowing that was not going to be enough because the tire was warm.

Pumped it up to 42 psi cold tire pressure today and went for a ride. MUCH better. Little-to-no squirminess. Much more predicatble handling. Handles closer to how the BFG g-force on the Rune handles. Not quite as unnoticeable, but much better than it was.
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post #335 of 371 Old 06-30-2019, 10:58 PM
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Some riders like to run them closer to 32-34 psi in order to create more flex and a larger contact patch.

That just never worked for me...

Ken IBA# 366
'13 K16GTL & '09 K13GT-LD
Some people see the gas tank as half empty. Some see it as half full.
All I care is that I know where the next tankful is coming from...
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post #336 of 371 Old 06-30-2019, 11:22 PM
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Originally Posted by Meese View Post
Some riders like to run them closer to 32-34 psi in order to create more flex and a larger contact patch.

That just never worked for me...

The "squirmy" was at 36 psi (cold tire pressure), when leaned over in a corner at high speed. If there was no solution for that, I probably would have put an MC tire back on.

I have run 42 in the CT on the Rune for over a decade, despite other darksiders liking to run lower pressures.

Going to stick with 42 on the K1600 too.

I actually ran some interpolations based on the load ratings at max psi of this tire (vs. OEM) and came up with the proper pressure being ~41 psi for this model tire on the K1600. Since spec is 42 and I am a big guy / heavy load anyway. just going to keep testing at 42 and will likely stay there unless I encounter some reason not to stay at 42.
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post #337 of 371 Old 07-01-2019, 03:35 PM
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Originally Posted by phat6 View Post
Pirelli Snowcontrol 3 -- 195/55R17 - fits, without a spacer!


It is a TIGHT fit. It rubs on both sides while squeezing it into position. Did not remove the exhaust--put it in through the back. Once mounted and torqued, no rubbing while on the center stand. Took it out ran it up to ~70, did some gentle turns, and brought it back to inpsect for any rubbing or issues. I forgot to check the tire pressure. Turns out the shop that mounted it on the rim aired it up to 51 psi--way too much pressure. Let it down to 42 psi and will be doing some more testing, but so far looks like this one works!

Have you checked again to make sure no rubbing?
I'm installing my Pirelli Snowcontrol 3 this afternoon.
I'm hoping for the same good luck with mine!!!!!
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post #338 of 371 Old 07-01-2019, 08:31 PM
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I installed my Pirelli tonight!!
I have not ridden it yet but statically I have a .060 gap between the widest part of the tire and the swingarm with 42 psi.
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post #339 of 371 Old 07-01-2019, 09:50 PM
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Originally Posted by Mudbone View Post
Have you checked again to make sure no rubbing?
I'm installing my Pirelli Snowcontrol 3 this afternoon.
I'm hoping for the same good luck with mine!!!!!

Almost 500 miles now. No issues. Running 42 psi cold tire pressure.
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post #340 of 371 Old 07-01-2019, 10:29 PM
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No rubs after almost 500 miles, including plenty of spirited riding at 42 psi:






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