| How Much PSI for my new "darkside" Sumitomo? | |
|
+9model28a tankyuong DennisB armelão jdeereanton honda_silver Hammy Jeff Rosenkranz Slick-Tenn 13 posters |
Author | Message |
---|
Slick-Tenn Scooter Rider
Number of posts : 47 Points : 5318 Registration date : 2010-07-19
| Subject: How Much PSI for my new "darkside" Sumitomo? Sat Aug 14, 2010 8:53 pm | |
| Took the leap today - my mechanic installed (with much hassle) my Sumitomo tire on my 03 Swing (ended up putting a tube in it to press it onto the rim, then removed the tube and presto! The tire then mounted itself to the rim). I took a 30-mile jaunt home with 40 psi, but it feels squirrely - like it's overinflated. I plan to decrease in 2-lb increments to find a "feel-good" PSI. Any suggestions? |
|
| |
Jeff Rosenkranz Super Scooter Rider
Number of posts : 241 Points : 5731 Registration date : 2009-12-31
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Sat Aug 14, 2010 9:08 pm | |
| Hi Slick. From the tire shop, my Sumi was handed to me with 34lbs. I have since reduced that to 30lbs and she feels great. I hope you hear from Bill on this, as he has mucho miles on his Sumi. I'm happy with 30.......and I'd be happy to "BE" 30 again! Take care....Jeff. |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Sat Aug 14, 2010 11:08 pm | |
| I usually have 40-42 on my Pirelli Diablo rear, but already have a Sumitomo ordered when the Diablo says sayonara. I've heard that typically most folks have lower psi in the front than the back -- I wonder if the same holds true for a darkside tire? |
|
| |
honda_silver Silver Wing Guru
Number of posts : 2453 Location : Georgetown, Tx Points : 8393 Registration date : 2008-12-23
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Sat Aug 14, 2010 11:18 pm | |
| - Slick-Tenn wrote:
- Took the leap today - my mechanic installed (with much hassle) my Sumitomo tire on my 03 Swing (ended up putting a tube in it to press it onto the rim, then removed the tube and presto! The tire then mounted itself to the rim).
That is a simple non-destructive solution. Do you have any more details on the mechanic's "hassle"?? - Slick-Tenn wrote:
- I took a 30-mile jaunt home with 40 psi, but it feels squirrely - like it's overinflated.
When did it feel squirrley ... straight or on curves. Remember for the first 250-300 miles, until the Sumitomo has scrub the mold compound ... the darkside tire should not be pushed or tested in curves especially when wet. - Slick-Tenn wrote:
- I plan to decrease in 2-lb increments to find a "feel-good" PSI.
If I want a very responsive counter-steering in twisties, I will run the darkside Sumitomo at a higher pressure 45 PSI ... though the tire will not absorb as much shock. For the majority of times, I will run the darkside Sumitomo at a lower pressure 32 PSI ... the tire will absorb a significant amount of shock. |
|
| |
Slick-Tenn Scooter Rider
Number of posts : 47 Points : 5318 Registration date : 2010-07-19
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Sun Aug 15, 2010 10:04 pm | |
| - honda_silver wrote:
- Slick-Tenn wrote:
- Took the leap today - my mechanic installed (with much hassle) my Sumitomo tire on my 03 Swing (ended up putting a tube in it to press it onto the rim, then removed the tube and presto! The tire then mounted itself to the rim).
That is a simple non-destructive solution.
Do you have any more details on the mechanic's "hassle"??
- Slick-Tenn wrote:
- I took a 30-mile jaunt home with 40 psi, but it feels squirrely - like it's overinflated.
When did it feel squirrley ... straight or on curves.
Remember for the first 250-300 miles, until the Sumitomo has scrub the mold compound ... the darkside tire should not be pushed or tested in curves especially when wet.
- Slick-Tenn wrote:
- I plan to decrease in 2-lb increments to find a "feel-good" PSI.
If I want a very responsive counter-steering in twisties, I will run the darkside Sumitomo at a higher pressure 45 PSI ... though the tire will not absorb as much shock.
For the majority of times, I will run the darkside Sumitomo at a lower pressure 32 PSI ... the tire will absorb a significant amount of shock. The motorcycle tire (IRC) he took off is wider rim-to-rim. The Sumi is quite a bit narrower (around the rim). It was simply impossible to get both inside beads up against the rim to catch the air. He tried wrapping around the tire with a strap, but the tread wouldn't cooperate. So, he ended up putting in a tube and the tire seated great. The plan was to drive it around for a week or two and then remove the tube. But, we rolled the dice and removed it before putting the wheel back on and VOILA! it seated. About a 90-minute process. |
|
| |
honda_silver Silver Wing Guru
Number of posts : 2453 Location : Georgetown, Tx Points : 8393 Registration date : 2008-12-23
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Sun Aug 15, 2010 11:06 pm | |
| Here is the Sumitomo specifications
http://www.tirerack.com/tires/tires.jsp?tireMake=Sumitomo&tireModel=HTR+T4&partnum=67TR3HTRT4&vehicleSearch=false&fromCompare1=yes
Service Description: 165/70R13 Load Range: 78T SL UTQG: 560 A B Speed Rating “T” = 118mph (190kph) Max Load: 937 lbs. Max. Inflation Press.: 51 psi Tread Depth: 9/32" Tire Weight: 14lbs. Rim Width Range: 4-5.5" Meas. Rim Width: 5" Sect. Width: 6.5" Tread Width: 5" Overall Diam.: 22.2" Revs Per Mile: 949 Country of Origin*: "CN" = CHINACN |
|
| |
Slick-Tenn Scooter Rider
Number of posts : 47 Points : 5318 Registration date : 2010-07-19
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Mon Aug 16, 2010 12:19 pm | |
| - Slick-Tenn wrote:
- Took the leap today - my mechanic installed (with much hassle) my Sumitomo tire on my 03 Swing (ended up putting a tube in it to press it onto the rim, then removed the tube and presto! The tire then mounted itself to the rim). I took a 30-mile jaunt home with 40 psi, but it feels squirrely - like it's overinflated. I plan to decrease in 2-lb increments to find a "feel-good" PSI. Any suggestions?
THANKS TO ALL WHO REPLIED! I'VE PUT IN 32 PSI AND THE TIRE SEEMS TO BE RUNNING AND FEELING AS IT SHOULD. OF COURSE, GETTING USED TO THE SIDEWALLS FLEXING WILL TAKE SOME GETTING USED TO, BUT I AM THRILLED AT THIS POINT! THANKS AGAIN! |
|
| |
jdeereanton Silver Wing Guru
Number of posts : 1995 Age : 77 Location : Huntsville, AL Points : 7903 Registration date : 2008-12-24
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Mon Aug 16, 2010 1:15 pm | |
| THERE IS NO HANDLING DIFFERENCE, or so we're constantly told, so there is nothing to get used to . Enjoy the ride of that car tire. |
|
| |
armelão Scooter Rider
Number of posts : 12 Points : 5344 Registration date : 2010-05-11
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Mon Aug 16, 2010 5:34 pm | |
| Hi! can anyone put some photos with darkside tires for we can see? |
|
| |
Jeff Rosenkranz Super Scooter Rider
Number of posts : 241 Points : 5731 Registration date : 2009-12-31
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Mon Aug 16, 2010 6:00 pm | |
| Hi Armelao. I have a pic of my 03 in " Silverwing Topics'. Darkside....yes or no. page two. The pic of your scoot....tell us about it. Thanks...Jeff |
|
| |
DennisB Silver Wing Guru
Number of posts : 2778 Age : 74 Location : NE Oklahoma Points : 9119 Registration date : 2008-12-28
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Mon Aug 16, 2010 6:07 pm | |
| Jeff, I still have the picture you sent me do you need it now? |
|
| |
honda_silver Silver Wing Guru
Number of posts : 2453 Location : Georgetown, Tx Points : 8393 Registration date : 2008-12-23
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Mon Aug 16, 2010 6:40 pm | |
| |
|
| |
armelão Scooter Rider
Number of posts : 12 Points : 5344 Registration date : 2010-05-11
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Mon Aug 16, 2010 6:43 pm | |
| thank´s,i have seen,here in portugal,we don´t practice dark side. |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Tue Jun 19, 2012 1:32 pm | |
| It might just be me (very likely just my poorer riding ability) but I have a lot of trouble with sharp right turns as well as switchbacks. No problem with twisties otherwise. I'm running 33psi in the rear. Do you think I would do better with a lower psi? |
|
| |
tankyuong Silver Wing Rider
Number of posts : 475 Age : 49 Location : Missouri Points : 6319 Registration date : 2009-07-12
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Tue Jun 19, 2012 2:48 pm | |
| |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Tue Jun 19, 2012 3:35 pm | |
| Another caveat: I run quite heavily loaded as I have a 5 gallon tourtank and I also have Ortlieb saddlebags and a full complement of tools since I'm often all over the place by myself. Do you think 30psi would still be fine or should I bump it up a little?
Right now I'm running 34 loaded, and I'm not good on switchbacks AT all. |
|
| |
model28a Silver Wing Guru
Number of posts : 2085 Age : 71 Location : St.Pete.FL. Points : 7579 Registration date : 2010-02-03
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Tue Jun 19, 2012 6:14 pm | |
| - Hammy wrote:
Right now I'm running 34 loaded, and I'm not good on switchbacks AT all. Not sure about the air pressure, but try doing some switchbacks sober instead of loaded and you may do better. |
|
| |
old fart Scooter Rider
Number of posts : 85 Age : 75 Location : Edmonton, Canada Points : 5905 Registration date : 2009-02-02
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Tue Jun 19, 2012 11:55 pm | |
| I did some research on the Delphi forum and they recommended 38 psi. I tried several different pressures and 38 psi was the sweet spot. |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Wed Jun 20, 2012 9:32 am | |
| 38 psi for the Silverwing to do twisties... Kinda runs counter to what I've been told that lower psi was actually better. I'll have to give it a shot, but the last time I rode on 40, it was not comfortable at all. Then again, it was when I was still feeling it out. I just hate that I can't do sharp right turns or switchbacks like I used to. It works great for everything else though. |
|
| |
matthew Touring Scooter Rider
Number of posts : 361 Location : near Santa Fe, NM Points : 6256 Registration date : 2008-12-24
| |
| |
honda_silver Silver Wing Guru
Number of posts : 2453 Location : Georgetown, Tx Points : 8393 Registration date : 2008-12-23
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Wed Jun 20, 2012 10:29 am | |
| I find that the higher the pressure, the faster the Silverwing responds to the counter steering.
With the Sumitomo tire at the higher 45-50 PSI, the response seems to be immediate.
If I am going to ride very twisty roads, I raise my PSI to 45 for the best handling ... otherwise I run a lower PSI.
Lower PSI provides better shock absorbing.
So for me it depends which balance of the two I would like. |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| |
| |
Cosmic_Jumper Site Admin
Number of posts : 4415 Age : 81 Location : damn near Philadelphia, PA Points : 10766 Registration date : 2009-06-12
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Wed Jun 20, 2012 1:46 pm | |
| I raised my PSI to 45 a week or so ago. So far I don't feel any 'squirreliness'. |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Wed Jun 20, 2012 2:13 pm | |
| Hey Tim, do you think I'd do better in the twisties with a higher pressure? My Goldwing buddies have been telling me to go lower instead. When you did the Dragon, what pressure were you running? |
|
| |
honda_silver Silver Wing Guru
Number of posts : 2453 Location : Georgetown, Tx Points : 8393 Registration date : 2008-12-23
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Wed Jun 20, 2012 6:21 pm | |
| - Hammy wrote:
- I have an 04 too. Perhaps it would be smart for me to show you what I mean when I say my Swing is fully loaded
I was loaded with when I went to Ozark ( E52 case packaged, rear seat loaded with camping gear: sleeping bag, Therma-Rest pad, tent, Silverwing cover, small folding camping seat ). The Ozark had some great twisties. Upper Arkansas 7 was a very interesting ride, it had twisting with the slick tar snakes. The front tire constantly felt like it was slipping out when it hit the tar snakes in a curve and the rear darkside Sumitomo tire did not slip on the curves ... if only the front motorcycle tire gripped like the softer Sumitomo car tire
Last edited by honda_silver on Thu Jun 21, 2012 4:46 pm; edited 1 time in total |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Wed Jun 20, 2012 11:13 pm | |
| Well, I bumped it up to 40. What a difference. MUCH more responsive, but also a harsher ride. I do have the rear springs set at 5; maybe I'll set them to 4 and see how it goes. I did feel MUCH better in the few twisties I was using as a testing ground. I'll get to test these out on a group ride on Saturday to the Delaware Water Gap. I have missed the handling! |
|
| |
honda_silver Silver Wing Guru
Number of posts : 2453 Location : Georgetown, Tx Points : 8393 Registration date : 2008-12-23
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Thu Jun 21, 2012 8:06 am | |
| - Hammy wrote:
- Well, I bumped it up to 40. What a difference. MUCH more responsive, but also a harsher ride.
As expected. - Hammy wrote:
- I do have the rear springs set at 5; maybe I'll set them to 4 and see how it goes.
As I recall, 5 is the harshest setting. So trying lower settings or pre-tensioning with the PVC plastic collar may help. - Hammy wrote:
- I'll get to test these out on a group ride on Saturday to the Delaware Water Gap.
Are you taking US-209?? |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Thu Jun 21, 2012 8:12 am | |
| Yeah, 5 is the hardest setting. What does "pre-tensioning" do? Sounds like would make it even harsher? (turn the volume up to 11 kinda thing) I just hope I don't start bottoming out at 4 (haven't really bottomed out, but going over bumps in the road last night was a little jarring). As for the Water Gap, I'm dragging for my motorcycle group so I didn't plan the route, but this is what we're doing: http://goo.gl/maps/Cwqh and http://goo.gl/maps/teTz It'll be a good test. |
|
| |
robert Super Scooter Rider
Number of posts : 267 Age : 81 Location : arizona Points : 5484 Registration date : 2010-09-19
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Thu Jun 21, 2012 2:30 pm | |
| Let's see, your mechanic had trouble mounting the car tire on your S/Wing, you can't take the twisties or turns very well, car tires on two wheeled vehicles are outlawed in alot of countries for safety reasons, hey it's your Butt, just hope you don't get in an accident and cause harm to others.
Ride Safe. |
|
| |
Hammy Touring Scooter Rider
Number of posts : 362 Age : 47 Location : Philadelphia, PA Points : 5708 Registration date : 2010-05-22
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Thu Jun 21, 2012 2:32 pm | |
| Gee, thanks. Enjoy your ride too. |
|
| |
honda_silver Silver Wing Guru
Number of posts : 2453 Location : Georgetown, Tx Points : 8393 Registration date : 2008-12-23
| Subject: Re: How Much PSI for my new "darkside" Sumitomo? Thu Jun 21, 2012 4:36 pm | |
| Moved to Darkside Car Tire :: Darkside Car Tire Experience
|
|
| |
| How Much PSI for my new "darkside" Sumitomo? | |
|