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03-21-2024, 10:37 AM
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#1
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New Member
Join Date: Sep 2022
Location: Cranberry Township
Posts: 7
M.O.C. #31716
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Minimum tire depth before replacement
We tow our 2021 Montana 3121RL rig with a 2021 GMC Sierra 2500 Diesel 4WD truck. This is the first time we’ve owned a truck and want to keep it properly serviced. The truck is 3 years old with almost 30,000 miles of which 13,000 are towing miles. What is the minimum tire tread depth you would not allow your tires to go below to ensure safe towing with the truck. Tires are now at 4/32 front and 5/32 rear.
Thoughts and recommendations?? TIA!
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03-21-2024, 01:28 PM
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#2
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Montana Master
Join Date: Jan 2018
Location: Granger TX
Posts: 2,598
M.O.C. #21044
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I always go by Abe Lincolns head on a penny. I'm sure someone will have a more scientific answer.
__________________
MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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03-21-2024, 01:41 PM
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#3
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Montana Master
Join Date: Oct 2004
Location: Salem
Posts: 7,671
M.O.C. #2283
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I wouldn’t go much more than 1/2 of the thread left. Sure it’s legal to go less but it isn’t as safe.
Lynwood
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03-21-2024, 02:19 PM
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#4
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,589
M.O.C. #30417
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There are wear bars. Don't get to them!
__________________
Tony & Donna & the best dog ever, Murphy.
2022 Montana HC, 295RL, 720 watts Solar, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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03-21-2024, 03:57 PM
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#5
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Montana Master
Join Date: Mar 2021
Location: Western NY
Posts: 548
M.O.C. #28430
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Legal is 1/16” or right on the wear bar but I buy new at twice that, 4/32.
My truck, also a ‘21 came with Michelin LTX A/T, has 39,000 on it and they are at 9/32
I have bought 10 new pickups since 1976 and the factory tires have always rode the best and lasted the least. Some of them barely made 30k. These I am impressed with. Good ride, quiet and they should go 60k.
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Mark & Karen
2021 3121rl - slide toppers, cottage white, X-Factors, disc brakes, Gen-Y pinbox
2021 F-350, 6.7L, SRW CC LB - B&W Companion, Bakflip cover
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03-22-2024, 04:08 AM
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#6
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,237
M.O.C. #25165
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The penny gauge is a good indicator. I taught that to my daughter years ago. The measurement I've always used is 3/32nds inches. I have a tread depth gauge for readings in 32nds of an inch.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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03-22-2024, 01:09 PM
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#7
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Montana Master
Join Date: Mar 2012
Location: Davison
Posts: 786
M.O.C. #12331
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Are you measuring to the bottom of the water channel or the wear bar? To the wear bars is generally 2/32". Personally, I wouldn't want them that low. Most LT tires are 13/32" or more when new.
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