• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Tire Pressures?!?

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Guest
Looking for some advice/experience/thoughts on tire pressures with modern bias ply tires. The bike is an 82 1100E. I installed a set of Shinko 230's a couple of days ago, tubeless on both ends. 100/90 front and 130/90 rear. Set the tire pressures to 32F/34R and did one quick test ride to check the installation and scrub some release compound off. They felt OK, with a bit less stability around center than the BT45's they replaced but I didn't go far enough or hard enough to tell much more than that. I mostly ride solo, usually semi-spirited street riding.

I used to run the BT45's around 36F/38R or a bit higher but that now seems too high to me after years of radials on modern sport bikes. What do other people run for pressures? What is deemed too low or too high? Symptoms of being too low or high? Does anybody go down to 30psi or less for street use?


Mark
 
I'm running the same tire front and rear on my 850 the dealer (Ironpony) told me the shinkos like to be around 40 front and 42 rear. I ran that on my trip last week (1700miles) without any issues. The rear tire is the second one I've had. I got about a year out of the first, sadly I don't know how many miles that was I didn't record the install milage. But it was kept at 38psi. I was hoping to get more than a year out of it since I generally get a year out of my Busa and I know the 850 isn't putting nearly the power to the road as the Busa.
Hope this helps some.
 
I think I'm running about 30f/36r right now with fairly new Pirelli Sport Demons. But I'm not as brave as you - I'm running tubes. Why? "That's what the stock wheels were designed for," according to my mechanic.

You running the stock '82 11e 'snowflakes'?
 
Nessism said:
You should be okay at those pressures. If you really want to go wild look up details about the 10% rule...http://www.thegsresources.com/_forum/showthread.php?201309-10-tire-pressure-rule-revisited
Click to expand...

Thanks, Ed. I'm not completely sold on the 10% rule for street use. It was intended for track tires being used on the track and works fine there, but street riding never gets the tires hot and keeps them hot like the track does.


76_Mike_82 said:
I'm running the same tire front and rear on my 850 the dealer (Ironpony) told me the shinkos like to be around 40 front and 42 rear. I ran that on my trip last week (1700miles) without any issues.
Click to expand...

You shouldn't have any issues with pressures that are on the high side, all that does is give up some traction as compared to lower pressures. I am most interested in how low people have gone and what they think of it. On my 06 GSXR1000 the front end gets twitchy on the street if I get much below 30psi, but running 28F/28R works fine on track days in our moderate Alberta temperatures. Does anybody have any comments on the symptoms of low pressure on their GS with bias ply tires? Do they also start to get unstable? Wallowy? Something else?


Rob S. said:
I think I'm running about 30f/36r right now with fairly new Pirelli Sport Demons. But I'm not as brave as you - I'm running tubes. Why? "That's what the stock wheels were designed for," according to my mechanic.

You running the stock '82 11e 'snowflakes'?
Click to expand...

Yep, stock wheels. My reasons for going tubeless are:

1) The tires are designed as tubeless.
2) The rear wheel is designated 'tubeless' and marked with the correct MT profile designation for running tubeless tires, so it is perfectly OK to run tubeless on.
3) The front wheel is not marked as such, but I know lots of people here have done it without issue. I did have a tube ready as back up in case we couldn't get the bead to seat properly but it gave no trouble and seated fine.
4) It saves unsprung/rotating weight, tires run cooler and gets away from the explosive deflation mode that tubes typically have.

So far, so good...


Mark
 
76_Mike_82 said:
I'm running the same tire front and rear on my 850 the dealer (Ironpony) told me the shinkos like to be around 40 front and 42 rear.
Click to expand...

That's about what I run on the Shinkos on my heavy-ass, Windjammered, luggaged, mostly two-up 850. Front end get twitchy real fast if it's below 38-40 psi cold.
 
850GT_Rider said:
That's about what I run on the Shinkos on my heavy-ass, Windjammered, luggaged, mostly two-up 850. Front end get twitchy real fast if it's below 38-40 psi cold.
Click to expand...

I'm like you, my 850 is fully loaded, vetter fairing, stereo, full luggage. But I've never felt it get squirrelly. I stay onbmy tire pressure, seen too many blow out on due to low pressure.
 
Just an update and another question on the Shinko 230's.

First, the update. I have been out for a couple hundred km's now on a couple nice days. First ride I went with 30F/35R after some PM discussions with a couple members here. It felt OK and handling around center was good but turn in was slightly twitchy. Second ride I went with 30F/32R because I am just not sold on having such a big pressure difference between the two and I didn't seem to be using much of the rear tire. I liked this better and turn in was less twitchy and felt more predictable. I will probably stay here for a while and see what I think of it with more miles. If I am going to ride two up I will run the rear back up to 35psi to compensate for the passenger weight.

Now the question for those with 230 experience: Which tire gets to the edge first? I am now used to wide radials on modern sport bikes and the rear always gets scrubbed to the edge first and the front always has ~1/4" wide chicken strips that never get touched, at least with me at the controls. The 230's on my 1100E are looking like the front will be scrubbed to the edge first and a small chicken strip remaining on the rear. Is this normal for these?


Thanks,
Mark
 
I'm running 32F and 36R and have had no issues with feel. This is also where the 10% increase landed as I did several different pressures before settling on the 32/36.
 
I've got Shinkos on my 1100g. If I get too much under 30psi on the front, the bike turns like a pig. 30+ and the turning is much quicker. I don't notice that from the rear, but I do notice less traction over 30psi. So I like 34F/30R.
 
I run what it says on the tire. Shinko 230's is what I am running on my GS850
 
nejeff said:
I run what it says on the tire. Shinko 230's is what I am running on my GS850
Click to expand...

nejeff said:
Is there a reason to not run what it says on the tire?
Click to expand...

All it gives on the tire is the maximum safe pressure, it says nothing about an optimal tire pressure. You have to find that on your own as it varies between bikes and riders. If you are running at the maximum rated load then you would want to run the max pressures. At lesser loads lower pressures will perform better and that is what I am looking for. The reasons to run less than maximum are improved handling and more traction. So far I am happy with the 30F/32R and am sticking with it for the moment.


Mark
 
You must log in or register to reply here.
Back
Top