Darkside Tire Pressure Experimenting.... What PSI's are you using? - Steve Saunders Goldwing Forums
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post #1 of 26 (permalink) Old 05-30-2012, 05:38 PM Thread Starter
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Well it's been almost a year now since I went darkside on the rear and later double darkside by the end of last year. I wasn't able to get a lot of riding in since then because of recovering from minor surgery at the beginning of this year. I had been running 44-46 PSI in my Formoza and after putting the BT45 on the front, it was recommended that I go at least 44 PSI there as well. Now I have been able to get a bunch more riding in. I had originally started with 40 psi in the rear and would get wobbles at higher speeds in corners (75 mph+). At 42 psi, it seemed to help but was still there, At 44 psi, it was considerably better. But the one thing that kept coming up was a strange oscillation while riding straight ahead. It would show up after riding straight forsome length of time. It wasn't anything that would make me concerned about losing control, it just felt weird. I even tried bumping the Formoza up to 48 and the BT45 to 46 but it would still keep showing up. So I decided to try and go the other way with the tire pressure. I ended up dropping the front BT45 down to 34 psi and the Formoza rear to 36 psi. At first I was concerned that I might have difficulties. I thought that the front end might be hard to maneuver and had previously been warned that higher pressure was needed to help prevent a "squirrely" feel. However for me, it seems like the opposite occurred. The front end is still just as easy to maneuver but also has a nice solid feel. With dropping the rear pressure, I was initially concerned that I might get the wobbling in corners but at a lower speed. That also didn't seem to happen. At 80-85 mph+ in corners, I will still get a slight wobble if the pavement is uneven but under that it seems to feel perfect. The one thing that does seem to have gone away though is the straight ahead oscillation.

The thing that concerned me about those higher pressures was that the Formoza lists a max pressure of 44 psi and the BT45 lists a max of 41 psi. I am not a fan of running a tire at or over the max psi. but that was what many darksiders were recommending. On cars, it seems like the recommended operating pressure is normallybetween 20-30% below the max psi. In my case, it seems like running at a lower psi might be the ticket. I still have to get some more miles on these tires to make sure.

How many other darksiders have tried experimenting with lower pressures instead of running at or over the max psi? If so, what experiences have you had?


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post #2 of 26 (permalink) Old 05-30-2012, 05:44 PM
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I've got the Goodyear Assurance Fuel-Miser and started with 36 lbs. Terrible wobbling and constantly hunting for that perfect angle, when going straight. Curves were an adventure. I slowly increased to 55 lbs, in increments of 5 and am content with the results. Still miss the motorcycle ride that I have lost, though. I'm afraid this will be my first and only CT experience.


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post #3 of 26 (permalink) Old 05-30-2012, 06:01 PM
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I run 47 or 48 on my Forenza.




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post #4 of 26 (permalink) Old 05-30-2012, 06:53 PM
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Are you running Dynabeads or wheel weights?

Sounds like the wheels need balanced.

On my 1800 I run an all season non run flat tire.

Can't tell the difference between it and an E-3.

I run 42 PSI in mine and have no problems.


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post #5 of 26 (permalink) Old 05-30-2012, 07:07 PM
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I have a 195/55R-16 KUMHO ECSTA SPT XRP RUN FLAT and run 41psi. Smooth as silk, in the curves and in the rain. Exactly the same tire as on my Prius.
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post #6 of 26 (permalink) Old 05-30-2012, 07:16 PM
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I run 41 on my Dunlop Wintersport.

The transition from the Pilot GT was entirely transparent to me.

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post #7 of 26 (permalink) Old 05-30-2012, 07:16 PM
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mikef wrote:
Quote:
I'm afraid this will be my first and only CT experience.
Certainly your decision to make, Mike, but I can honestly say that I get off my Valk, which is running a Pilot GT and get on my Wing with the Austone and feel very little difference in handling. I sure don't slow down one iota in the twisties because of the CT. I now have over 5,000 miles on the Austone and it only seems to get better.

I'm running 47-48 lbs in the Austone. Settled on that thru experimentation.

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post #8 of 26 (permalink) Old 05-30-2012, 10:15 PM Thread Starter
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Well it does sound like something isn't quite right then. The wheelbearings are less than a year old, All Balls and I ended up adding more wheel bearing grease to them. I re-torqued the steering head and also checked for any notchiness feel. And no visible issues with either tire and I checked by spinning them and looking. Everything seems to line up the way it should....

SETHAN12 wrote:
Quote:
Are you running Dynabeads or wheel weights?

Sounds like the wheels need balanced.

On my 1800 I run an all season non run flat tire.

Can't tell the difference between it and an E-3.

I run 42 PSI in mine and have no problems.
I am using dynabeads. IIRC, I put 2 oz in the front and 3 oz in the back. Maybe I should add some more to both like another oz to the front and 2 to the rear. I bought a bulk 20 oz pack so I have extra. Im guessing it couldn't hurt anything. I'll do that either tomorrow or Friday morning before I leave for the Upper Midwest Unrally.


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post #9 of 26 (permalink) Old 05-30-2012, 11:11 PM
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I run my Austone at 48 psi and find the ride/handling great. Almost can not tell it is not an E3. 'Cept it's quieter. I run the front Pilot Active at 40/41.

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post #10 of 26 (permalink) Old 05-31-2012, 07:11 AM
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Dont know about the 1500, but I agree with Sethan's findings. I run a Falken non-RF @ 42PSI. No differences between the E3 I removed except its not as noisy.

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