Truck snow tires

[SnowMachine]

I think the sizes are slightly different, but just very slightly. I'll have to check. Having lugged them in and out of the car last friday, they seemed to be similar in weight.



don't think so, not according to the TPMS.

Tire size (rolling diameter and width), weight and tread design. My truck lost almost 2MPG going from 34" tall highway tires at 80psi to 35" tall AT's at 65psi.

[Rideski]

Danno just to clarify, what is
mpg bfg
mpg blizzak
?

[Foggy_Goggles]

Well the Christmas Tree Hunters owned the ditch on the way to Meadow Creek. In the name of science and TGR, I stopped and gave every the number of the 24/7 tow truck company and did a tire audit. Exactly zero of the +/- 10 stuck vehicles had snow tires studded or otherwise. Lots of Jeeps, Forerunners and Tacos with Cosplay Winterwheeling set ups acting betrayed by YouTube needing to know how differentials work and learning that traction boards ain't get out of jail free cards. Also, many a rental with baloney skins.

[Djongo Unchained]

Danno just to clarify, what is
mpg bfg
mpg blizzak
?

Still in a morning blurr, I thought you were asking him to define mpg. And BFG. And Blizzak.

Laffed at myself shortly after.

...Cosplay Winterwheeling set ups acting betrayed by YouTube needing to know how differentials work and learning that traction boards ain't get out of jail free cards.

Also, many a rental with baloney skins.

baloney.

[Foggy_Goggles]

Bannana Peels!

Generally speaking it is people going outside and doing shit with their friends and family so I give them a pass and be helpful when I can. But I was pulling a snowmobile trailer so I was a bit limited.

But I laugh a bit because they are fully "influenced". Its as if they've got the Shackleton music playing. Full of selfie sticks and documentation. Almost as if they drove in the ditch on purpose for the 'gram.

And littered all over the road. And we've got these tree cutting permits and they plow a couple of routes which makes it worse. They all have the propane fire pits and camp chef going in the parking lot with a mega curated lunch.

[Name Redacted]

Bannana Peels!

Generally speaking it is people going outside and doing shit with their friends and family so I give them a pass and be helpful when I can. But I was pulling a snowmobile trailer so I was a bit limited.

But I laugh a bit because they are fully "influenced". Its as if they've got the Shackleton music playing. Full of selfie sticks and documentation. Almost as if they drove in the ditch on purpose for the 'gram.

And littered all over the road. And we've got these tree cutting permits and they plow a couple of routes which makes it worse. They all have the propane fire pits and camp chef going in the parking lot with a mega curated lunch.

We were out riding dirt bikes in this canyon in UT last fall. This guy in a fully kitted out OVERLAND Tacoma decided the he couldn't make the squeeze between two boulders (I thought he could have made it). So he was pulled over with a fire pit and a grill cooking pork belly tacos and gave us some. It was all documented on multiple cameras. Funny shit. Good tacos.

[byates1]

Never forget the first time I saw LA Asians w 19" rims low slung ricer on 395 s of mammoth in a 4-6' Storm trying to deal w snow socks while getting shaved by 18 wheelers.

[Danno]

Danno just to clarify, what is
mpg bfg
mpg blizzak
?

Hard to say an exact MPG because it changes from tank to tank, but I'd guess on a tank I'd get 14mpg on the BFG I am getting 16mpg on the Blizzak. The BFGs are at my new place so when I am over there I will get the exact sizing and post both.

[Danno]

And yeah, the Christmas Tree Mafia was out in full force in Grand County this weekend.

[zion zig zag]

And yeah, the Christmas Tree Mafia was out in full force in Grand County this weekend.

Full force in Teton Co, Idaho too. I think the bros from Idaho Falls may be a little more rugged than the front rangers though cause I didn't see them having any problems in their 15 yo 2500's and blaze orange.

[Rideski]

Hard to say an exact MPG because it changes from tank to tank, but I'd guess on a tank I'd get 14mpg on the BFG I am getting 16mpg on the Blizzak. The BFGs are at my new place so when I am over there I will get the exact sizing and post both.

The way it was phrased wasn't sure which you meant got better mpg. If you're saying better mpg from Blizzak, I'd have to guess the tires or the wheels or both are heavier with the BFG's

[J. Barron DeJong]

I don’t really buy the weight argument. How much additional weight is it actually, relative to total vehicle weight? And the energy is basically stored in the bigger ‘flywheels’, it’s not lost until braking turns it into heat, so shouldn’t affect highway mileage basically at all.

I’d guess it has much more to do with rolling resistance (tread pattern, rubber compound, carcass construction), aero drag (Different width? Different wheel diameter or design? Tread pattern), and maybe different diameter (if the winter tire is smaller diameter then the same odometer distance is less actual miles travelled compared to the BFG, which would give an artificially high mileage calculated for the winter tire).

[Rideski]

I prefer to think of it as a guess to his query, not an argument. From what I understand, rotational weight means a lot more than static weight. Have to get those spinning after every stop. But I haven't been to a Holiday Inn for a while.

[J. Barron DeJong]

I prefer to think of it as a guess to his query, not an argument. From what I understand, rotational weight means a lot more than static weight. Have to get those spinning after every stop. But I haven't been to a Holiday Inn for a while.

Ok, I think his guess is likely incorrect, for the reasons stated.

The general guideline is that rotational weight counts 3x non-rotating weight (takes 3x the energy to get it up to speed, since it’s needs to both move forward and spin up like a flywheel), but it would depend on where the additional weight is situated relative to axis of rotation.

So, for example, if one set of wheels/tires was 50lb heavier than the other, it would be similar to having the lighter wheels/tires on the vehicle and having a 150lb passenger in the car at all times.

How much do you notice your fuel economy changing with a passenger vs. without?

[XavierD]

Increased wheel weight and diameter will definitely reduce gas efficiency. The cost of accelerating that extra rotational weight isn’t going to be made up once you’re moving. One of the reasons bicyclists are willing to pay such a premium for carbon rims.easiest way to make a car more efficient is to put smaller and lighter tires (and wheels) on it.

If you want an experiment add 5lb of fishing weights to your bike wheels and see how you feel after a standard ride.

[rod9301]

The only reason to get larger diameter wheels is to be able to put bigger diameter brake rotors

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[bodywhomper]

Or because that’s what you find used that works on your truck.


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[J. Barron DeJong]

Increased wheel weight and diameter will definitely reduce gas efficiency. The cost of accelerating that extra rotational weight isn’t going to be made up once you’re moving. One of the reasons bicyclists are willing to pay such a premium for carbon rims.easiest way to make a car more efficient is to put smaller and lighter tires (and wheels) on it.

If you want an experiment add 5lb of fishing weights to your bike wheels and see how you feel after a standard ride.

On rolling time trials some teams have experimented with adding weights to their wheels. The added weight keeps the bike moving faster on the rollers due to the flywheel effect, then takes a bit more time to accelerate back up to speed on the downhills. The net effect is a more consistent speed, and a more consistent speed leads to less aero losses over the length of the course.

The benefits of lightweight wheels on bikes is oversold.

Again, the cost of the extra wheel weight on a car only comes when it gets turned into heat under braking. And the weight differences we’re talking about are likely small relative to total vehicle weight in most cases.

[TAFKALVS]

Tire size (rolling diameter and width), weight and tread design. My truck lost almost 2MPG going from 34" tall highway tires at 80psi to 35" tall AT's at 65psi.

Might not be as bad as you think, your Speedo (and odometer) are probably reading low fwiw

[Foggy_Goggles]

Nerds!

Who buys a truck for the MPG or knows what their wheels and tires weigh?

You can wank about when your Cute UTE running all seasons is in the ditch.

We've got about 7 other tire threads. This is the one for burning dinos, running over hippies getting up to early, driving too fast, turning up the puck rock with no fucks given.

[SnowMachine]

On rolling time trials some teams have experimented with adding weights to their wheels. The added weight keeps the bike moving faster on the rollers due to the flywheel effect, then takes a bit more time to accelerate back up to speed on the downhills. The net effect is a more consistent speed, and a more consistent speed leads to less aero losses over the length of the course.

The benefits of lightweight wheels on bikes is oversold.

Again, the cost of the extra wheel weight on a car only comes when it gets turned into heat under braking. And the weight differences we’re talking about are likely small relative to total vehicle weight in most cases.

Acceleration/deceleration the effect is far more noticeable vs a flywheel effect at steady speeds. Losing unsprung weight (wheel/tire) is hugely effective for race cars.

[SnowMachine]

Nerds!

Who buys a truck for the MPG or knows what their wheels and tires weigh?

You can wank about when your Cute UTE running all seasons is in the ditch.

We've got about 7 other tire threads. This is the one for burning dinos, running over hippies getting up to early, driving too fast, turning up the puck rock with no fucks given.

I drive a 8k lb truck with 1k ft/lbs of torque regularly. Sometimes loaded, sometimes not. A few extra lbs of wheel weight isn't much of a concern. Losing MPG's was just an observation.

[J. Barron DeJong]

Losing unsprung weight (wheel/tire) is hugely effective for race cars.

Yeah, I’m aware. My previous career was race car engineering.

[Danno]

Ok, so the two tire sizes are:

BFG 275/60/20
Blizzak 275/55/20

So the BFG is slightly larger, would that make such a noticeable difference? Or is that just one contributing factor, along with weight and tread and whatever.

[El Chupacabra]

Ok, so the two tire sizes are:

BFG 275/60/20
Blizzak 275/55/20

So the BFG is slightly larger, would that make such a noticeable difference? Or is that just one contributing factor, along with weight and tread and whatever.

It's just one factor.

Are you basing your observed MPG on a dashboard readout of MPG? Or based on hand calculated driven miles + actual fuel consumed?