Aftermarket tire pressure recommendations - Polaris ATV Forum
ATV Wheels & Tires Trying to upgrade the stock Wheels or Tires on your ATV? Post here! Fitment questions, sizes, brands, whatever.
Sponsored by Discount Tire

  • 1 Post By FPD218
  • 1 Post By Mike_B
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 06-09-2019, 04:03 PM Thread Starter
Junior Member
Polaris2012's Avatar
Join Date: Jan 2019
Posts: 19
Aftermarket tire pressure recommendations

I have a 2012 sportsman 500 an I just put new mega mayhame 12-9 in front an 12-11 in rear. Road around property little bit an I know I NEED to let some air out. They are rock solid at about 20-22 psi from the factory so climbing rocks n mud holes was like hitting a wall would just spin sometimes to catch traction. I guess my question is how low should I go or can go with tire pressure so I still have a nice ride but also don’t ruin or have the tire come of the rim. Any help or comment would b appreciated thanks
Polaris2012 is offline  
Sponsored Links
post #2 of 6 (permalink) Old 06-09-2019, 04:12 PM
Extreme ATV Enthusiast
ragdude's Avatar
Join Date: Nov 2010
Location: AZ
Posts: 453
wow 20 psi in an atv tire? Is that what the sidewall suggests? I'd cut that in half right away then probably down from there.

Protect the 2nd Amendment; it's the original homeland security act!
Bio fuel is the future; bring it home to the American farmer.
2005 Polaris 400 4x4
frt/rear rack extenders
Warn winch
front/rear bumpers
temp gauge
reverse light mod
heel clicker kit
lock-n-ride windshield
lock-n-ride gun scabbard
lock-n-ride rear hard box + side bags full of whatever I might never need, plus

Occasionally chased by a small trailer with more camping gear... good grief

2002 Trailboss 325
Front storage box
Rear storage bag...

I'm ready for a

ragdude is offline  
post #3 of 6 (permalink) Old 06-09-2019, 04:17 PM
Premium Member
FPD218's Avatar
Join Date: Aug 2016
Location: Winter, Wi
Posts: 965
I think what you are referring to on the tire sidewall it says "do not inflate over 22 PSI to set the bead" Cold PSI should be around 7 PSI after installation.

ragdude likes this.


2019 Sportsman 850 SP Premium

Removed all Warning Decals
3500# Polaris Winch W/Synthetic Rope
Winch Stopper Cable Line Saver
ATV-GURU.COM Front and Rear Bumpers
2" Receiver in Front Bumper
Kenda K587 HTR Bear Claws 26X9X14 & 26X11X14
Ultimate Series Windshield Fairing, Mid & Low Height Windshield
New Style Polaris Lock & Ride Rear Storage Box
Garmin GPS176C, Ram Mount
Polaris Rear View Mirrors
4" Front Rack Extender
Center Brake/Tail Light LED
Rear LED work lights/strobes

Built on March 27 2019
Purchased New April 13 2019 0.1 Hr .2 Mi
Power Sports Abrams, Wi

2006 Sportsman 800 EFI Twin
Purchased new to me on Aug 08 2016 97Hr's 811Mi
Sold Apr 07 2019 231 Hr 3126 Mi

"I am the majority!"

FPD218 is online now  
Sponsored Links
post #4 of 6 (permalink) Old 06-09-2019, 08:07 PM
polman500's Avatar
Join Date: Nov 2009
Location: SE Kentucky
Posts: 8,072
Holy cow!! They may blow out and kill an innocent bystander lol!
Tire pressure is dependent on terrain conditions, tire construction and rider preferences but having them that full is probably downright dangerous. I run around 6-7 psi in my Pit Bulls for most conditions. I also check them before every ride because pressure changes as temperature changes and they will lose some over time. With low pressure tires 1 or 2 psi makes a BIG difference. Altitude changes can also have a huge effect on pressure readings too.

Last edited by polman500; 06-09-2019 at 08:13 PM.
polman500 is offline  
post #5 of 6 (permalink) Old 06-09-2019, 08:11 PM Thread Starter
Junior Member
Polaris2012's Avatar
Join Date: Jan 2019
Posts: 19
I will double check tommarow an let you know but I’m pretty sure I said the same thing when I put my tire guarg on it. Only thing I can think of is they did that to seat the tire on the rimI will let you know tomorrow what they’re actually app but yes definitely have to grab it at least half I would think usually ride trails soft mud nothing too too crazy
Polaris2012 is offline  
post #6 of 6 (permalink) Old 06-10-2019, 02:28 PM
Extreme ATV Enthusiast
Mike_B's Avatar
Join Date: Apr 2015
Location: Pittsburgh, PA
Posts: 169
I do 5psi on 26" HTRs on 12" wheels

Sent from my SM-G970U using Tapatalk
sportsmandan likes this.

Mike_B is offline  

  Lower Navigation
Go Back   Polaris ATV Forum > Polaris ATV Technical Discussions > ATV Wheels & Tires

Quick Reply

Register Now

In order to be able to post messages on the Polaris ATV Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome