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SR244 Tires - Max pressure 41 psi, or 33 psi? (see photos)

SneakyDingo

Well-known member
Joined
Aug 6, 2021
Messages
1,560
Alright folks, so we have a bit of a discrepancy going. @bryanchurch06 and I were discussing this while I was at work - I knew that @dmonkey has mentioned the max tire pressure of the SR244's in the past is 33 psi, gleaned from a bunch of sites. I realized after I got home I actually had a spare SR244 and snapped a photo of the sidewall, where it very clearly states (as @bryanchurch06 mentioned) 41 psi.

So based on this, what's the actual maximum PSI of the SR244, and additionally what would be a recommended pressure for the SR244 fitted to the rear in the 17-3.00 at GVWR? I'm currently running 28 psi.

EDIT: I also notice the max load on the website isn't correct.

20230513_143904633_iOS.jpg

http://www.shinkotire.be/index.php/products/dual-sport/item/32-244-series - retrieved 5/13/23
2023-05-13 07_44_08-244 Series.png
 
Last edited:

AZ7000'

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Joined
Jan 28, 2021
Messages
957
I propose the unpopular idea that it doesn't really matter. Countries with 100's of thousands of small bikes and these or similar tires have users that add air when they appear flat, if the compressor is at 45-50 psi then so it goes.
Here are pictures of my two Shinko Golden Boy 244 x 17 tires currently mounted on my CT-125, the rear, by dumb luck is the higher rated and lists "50P" after the size, the front with the lower rating lists "45P" after the size on the sidewall. It would appear based on the load rating. I had no idea what the pressure actually was so I checked this AM and both at 30psi... Good for the summer in my book, unless I go on a long dirt ride then I'll probably go down to 20-25psi for comfort!
IMG_4691.jpegIMG_4692.jpeg
 

bryanchurch06

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Joined
Nov 4, 2022
Messages
711
I'm probably wrong about this but I'm just going by how I run my truck tires, when I was pulling my rv or carrying weight in the bed I always added air the the tires. So on this trip where I may have up to 50 extra pounds on the rear rack would I need extra air as opposed to bare bike riding, can a 150 pounds guy ride lower pressure than a 250 pounds guy?
 

TRF90

Active member
Joined
Mar 4, 2023
Messages
117
Location
West Texas
Look at the profile of the tire when you are sitting on the bike with all your gear. There should be a small bit of flex at the contact patch, but it should not look "low." For my CT on Shinko 241s, that works out to 28 pounds. I think the greatest risk is running on an overinflated tire with a smaller than "normal" contact patch. The tire is pretty narrow already!
 

bryanchurch06

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Joined
Nov 4, 2022
Messages
711
The max load for the tire is 419pds, if you take the maxload rating and divide it by the max psi 41 I get roughly 10.2. So can I assume every 1 psi in the tire is equal to 10.2 pds of weight rating? If so running 30psi gives the tire a proper weight rating of 306 pds. This is the most math I've done in a while so will the engineers please explain why I'm wrong in a way a moron can understand, thanks Bryan 😊
 

bryanchurch06

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Joined
Nov 4, 2022
Messages
711
I did a site search and I cannot find the answer, has anyone weighed the front and back tires to determine the weight distribution of the trail?
 
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