Hi, this is my first time on this forum, so I appreciate any help!I am wondering if I should put OEM size tires back on my truck? It is a 2007 Suburban 2500, with the 6.0l and 3.73 gearing. It currently has 265/75/16 which came on it when bought the vehicle and they need to be replaced. I discovered the factory sizing is 245/75/16. We tow a 31’ BHS that weighs nearly 10,00 lbs when loaded which puts us right at the max for the burb. I haven’t really had any issues towing, but some hills are definitely a slow go. We live in BC so it’s quite mountainous!What I’m wondering is if I would notice any difference in power if I go back to factory sizing? I don’t really want to as I find the 245’s just look a little small...Thanks, Randy

If you change back you won’t notice any difference IMO.

You won't notice any difference in power with that small of a tire change. If you were running a lift and 38" tires I would tell you different. Keep the 265's.

The 265 & 245 are thread width in millimetersThe 75 is the 'aspect ratio' ---- height of tire's cross-section to its width.The 75 means that the height is equal to 75% of the tire's width. The 16 is wheel diameter...16" rimsA 245/75/16 does look smaller then a 265/75/16 cause of difference in width and sidewall (aspect ratio)Weight carrying capacity could be very different depending on the tires Load Index so check side wall for MAX Load/MAX PSI265's will be slightly taller, a little bit wider, have a bit more sidewall and will turn LESS revolutions per mile VS the 245'sIf you aren't rubbing side of tires when turning, whacking top of tire when going over rough roads/bridge transitions/speed bumps & haven't gotten a speeding ticket (245@65mph = 265@67.5mph)replace with another set of 265's LOL

You'll notice some, as you have effectively made a 4.10 geared rig a 3.95, a 3.73 a 3.55 geared rig. Also the 245 tires are about 5 lbs less weight than 265's. At least I noticed the difference in my 88 k3500 with a TBI 454/TH400/3.73, and my 96 K3500 with a 6.5TD/NV4500/4.10 gears. My 02 on subject!marty

My 02 on the subject is, I want a tall aspect ratio tire for the terrible Michigan roads. Tires with lower aspect ratio's are more prone to pothole failure because there isn't enough sidewall to absorb the potholer shock and your rims could take a hit too.

Should I go back to OEM size tires? | Good Sam Community

blt2ski
Moderator
Jul 20, 2019
You'll notice some, as you have effectively made a 4.10 geared rig a 3.95, a 3.73 a 3.55 geared rig. Also the 245 tires are about 5 lbs less weight than 265's. At least I noticed the difference in my 88 k3500 with a TBI 454/TH400/3.73, and my 96 K3500 with a 6.5TD/NV4500/4.10 gears.

My 02 on subject!

marty
Old-Biscuit
Explorer III
Jul 20, 2019
The 265 & 245 are thread width in millimeters

The 75 is the 'aspect ratio' ---- height of tire's cross-section to its width.
The 75 means that the height is equal to 75% of the tire's width.

The 16 is wheel diameter...16" rims

A 245/75/16 does look smaller then a 265/75/16 cause of difference in width and sidewall (aspect ratio)

Weight carrying capacity could be very different depending on the tires Load Index so check side wall for MAX Load/MAX PSI

265's will be slightly taller, a little bit wider, have a bit more sidewall and will turn LESS revolutions per mile VS the 245's

If you aren't rubbing side of tires when turning, whacking top of tire when going over rough roads/bridge transitions/speed bumps & haven't gotten a speeding ticket (245@65mph = 265@67.5mph)replace with another set of 265's LOL
Bionic_Man
Explorer
Jul 20, 2019
You won't notice any difference in power with that small of a tire change. If you were running a lift and 38" tires I would tell you different. Keep the 265's.
Lwiddis
Explorer II
Jul 20, 2019
If you change back you won’t notice any difference IMO.

Forum Discussion

Should I go back to OEM size tires?

About RV Tips & Tricks

Related Content

Back ladder

Tires

Back up Camera

TC back to back propane tank question

TIRES