305/45r22 Terra Grappler G2 or 33x12.5r22 Ridge Grapplers (1 Viewer)

[LCStve]

My current tires are 285/45r22 Terra Grappler G2
Im considering changing my tires

If you were to choose
Would you go with
305/45r22 Terra Grappler 118S

Or

33x12.5r22LT Ridge Grapplers 114Q
(305/45r22 Ridge is not available near my area)


305/45r22 Terra Grapplers 118S
PROS:
1. Lighter weight tire 47lbs
2. Higher speed rating S
3. Higher load rating (118/ 2901 lbs @50psi max)

CONS:
1. Does not look beefy almost looks highway terrain from afar


33x12.5r22LT Ridge Grapplers 114Q
PROS
1. Looks Beefy and Wide

CONS
1. Heavy 62 lbs, will gas mileage increase significantly? might also affect acceleration/ handling
2. Lower speed rating Q
3. Lower load rating 114/2600 lbs at 80psi max (which I dont understand why, despite it being an F rated tire)

Also, what Psi should these be inflated to? Should an LT tire be inflated to a high PSI to maintain its load rating? I usually run 35 psi on my current 285/45r22, if I put in 35psi on 33x12.5r22 will the load rating become significantly lower?


Thanks

 

[Heckraiser]

A 45 series is a pavement tire, regardless of whether it's MT, AT, RT. Can't do any serious offroading with 22's on rubber band tires. F-rated tire is going to ride like crap. In fact, both will probably ride like crap. 22's are a complete functional contradiction on a 200 series. Probably not going to get much usable input on those sizes on this forum. /debbie downer

If this is just your style, it's your truck and it's a free country, so do what makes you happy. Seriously, more power to ya

 

[ryanCA]

more power to ya

needs lots of power to move those mammoth mammaries..

 

[LCStve]

A 45 series is a pavement tire, regardless of whether it's MT, AT, RT. Can't do any serious offroading with 22's on rubber band tires. F-rated tire is going to ride like crap. In fact, both will probably ride like crap. 22's are a complete functional contradiction on a 200 series. Probably not going to get much usable input on those sizes on this forum. /debbie downer

If this is just your style, it's your truck and it's a free country, so do what makes you happy. Seriously, more power to ya

Yes I dont do off road with this 200 we mostly use it as a family car, I got another truck for off road
Thanks for your reply

 

[gaijin]

My current tires are 285/45r22 Terra Grappler G2
Im considering changing my tires

If you were to choose
Would you go with
305/45r22 Terra Grappler 118S

Or

33x12.5r22LT Ridge Grapplers 114Q
(305/45r22 Ridge is not available near my area)


305/45r22 Terra Grapplers 118S
PROS:
1. Lighter weight tire 47lbs
2. Higher speed rating S
3. Higher load rating (118/ 2901 lbs @50psi max)

CONS:
1. Does not look beefy almost looks highway terrain from afar


33x12.5r22LT Ridge Grapplers 114Q
PROS
1. Looks Beefy and Wide

CONS
1. Heavy 62 lbs, will gas mileage increase significantly? might also affect acceleration/ handling
2. Lower speed rating Q
3. Lower load rating 114/2600 lbs at 80psi max (which I dont understand why, despite it being an F rated tire)

Also, what Psi should these be inflated to? Should an LT tire be inflated to a high PSI to maintain its load rating? I usually run 35 psi on my current 285/45r22, if I put in 35psi on 33x12.5r22 will the load rating become significantly lower?


Thanks

View attachment 3881931

View attachment 3881932

You don't mention what vehicle you are planning to mount these tires on, but if you are going to put them on an LC200:

Your current tires are ISO-Metric XL 285/45R22 114H which have an RCTIP of 41psi to attain a Load Limit of 2521 lbs. (whole psi rounded up from required Load Limit of 2512 lbs.).

The proposed Ridge Grapplers are a Floatation size 33X12.50R22LT which have an RCTIP of 66psi to attain a LT-adjusted Load Limit of 2293 lbs. (whole psi rounded up from required Load Limit (LT-adjusted) of 2286 lbs.

The proposed Terra Grappler G2's are ISO-Metric XL 305/45R22 118S which have an RCTIP of 36psi to attain a Load Limit of 2579 lbs. (whole psi rounded up from required Load Limit of 2512 lbs.).

So... TL;DR:

At 35psi your current tires are underinflated - they should be at 41psi
The 33X12.50R22LT Ridge Grapplers should be run at 66psi - yeah, they will be harsh to say the least.
The 305/45R22 118S Terra Grappler G2's should be run at 36psi - looks like an obvious choice for you among these candidates.

Take your pick.

HTH

 

[LCStve]

You don't mention what vehicle you are planning to mount these tires on, but if you are going to put them on an LC200:

Your current tires are ISO-Metric XL 285/45R22 114H which have an RCTIP of 41psi to attain a Load Limit of 2521 lbs. (whole psi rounded up from required Load Limit of 2512 lbs.).

The proposed Ridge Grapplers are a Floatation size 33X12.50R22LT which have an RCTIP of 66psi to attain a LT-adjusted Load Limit of 2293 lbs. (whole psi rounded up from required Load Limit (LT-adjusted) of 2286 lbs.

The proposed Terra Grappler G2's are ISO-Metric XL 305/45R22 118S which have an RCTIP of 36psi to attain a Load Limit of 2579 lbs. (whole psi rounded up from required Load Limit of 2512 lbs.).

So... TL;DR:

At 35psi your current tires are underinflated - they should be at 41psi
The 33X12.50R22LT Ridge Grapplers should be run at 66psi - yeah, they will be harsh to say the least.
The 305/45R22 118S Terra Grappler G2's should be run at 36psi - looks like an obvious choice for you among these candidates.

Take your pick.

HTH

Thank you very much for your reply. It helps with my decision
Yes will be mounting them on LC200 2019

Is there an article that I can read more about RCTIP? Or how to calculate Rctip?

I didnt realized Lt tires have to be inflated to a very high PSI Cause the shop told me it can be inflated to 35psi

By the way alot of guys run LT tires for off road and air down in the trails, does that mean they have significantly lower load rating?

 

[gaijin]

Thank you very much for your reply. It helps with my decision
Yes will be mounting them on LC200 2019

Is there an article that I can read more about RCTIP? Or how to calculate Rctip?

I didnt realized Lt tires have to be inflated to a very high PSI Cause the shop told me it can be inflated to 35psi

By the way alot of guys run LT tires for off road and air down in the trails, does that mean they have significantly lower load rating?

You're very welcome - glad you found the info helpful!

Toyo Tire published an excellent monograph on tires, pressures, etc. that should have all the info you need - find it here: Guidelines for the Application of Load and Inflation Tables

"Shops" are often wrong with their inflation recommendations for non-OEM size tire applications.

Airing down for offroad use is an entirely different ball game. When aired down, the Load Limit for the aired down tire decreases with the pressure - that is why it is not safe to drive at highway speeds with an aired down (i.e. underinflated) tire. Not only is the load carrying capacity of the tire reduced, the tire's ability to dissipate heat build-up is also diminished.

HTH

 

[LCStve]

You're very welcome - glad you found the info helpful!

Toyo Tire published an excellent monograph on tires, pressures, etc. that should have all the info you need - find it here: Guidelines for the Application of Load and Inflation Tables

"Shops" are often wrong with their inflation recommendations for non-OEM size tire applications.

Airing down for offroad use is an entirely different ball game. When aired down the Load Limit for the aired down with the pressure - that is why it is not safe to drive at highway speeds with an aired down (i.e. underinflated) tire. Not only is the load carrying capacity of the tire reduced, the tire's ability to dissipate heat build-up is also diminished.

HTH

Thanks for the Toyo Article

I also saw this website
Which converts Passenger Tire Pressure to LT Pressure
I did a sample comparison for 305/45r22 and 33x12.5r22

Tire Pressure Calculator

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

For 305/45r22 hypothetically, if inflated @32psi it shows that it has a load rating of 2338/1.1 (adjusted load for suv)=2,125 lbs which is more than enough for Lc200 right? (2125*4=8,500 lbs)

Or would 35-40psi be better maybe for lesser rolling resistance?

Besides increasing load rating, Is there any advantage for running high psi Or its not really necessary?

 

[gaijin]

Thanks for the Toyo Article

I also saw this website
Which converts Passenger Tire Pressure to LT Pressure
I did a sample comparison for 305/45r22 and 33x12.5r22

Tire Pressure Calculator

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

For 305/45r22 hypothetically, if inflated @32psi it shows that it has a load rating of 2338/1.1 (adjusted load for suv)=2,125 lbs which is more than enough for Lc200 right? (2125*4=8,500 lbs)

Or would 35-40psi be better maybe for lesser rolling resistance?

Besides increasing load rating, Is there any advantage for running high psi Or its not really necessary?



View attachment 3882686

I think you missed the most important first step in calculating Load Limits - determining the Load Limit for stock OEM tires on your vehicle.

For the LC200, that is a P285/60R18 tire @ 33psi which is a Load Limit of 2,512 lbs.

That means that P-Metric and ISO-Metric tires must meet or exceed a Load Limit of 2,512 lbs, and LT-Metric tires must meet or exceed 2,512/1.1 = 2,284 lbs.

Try your calcs again with these values.

Further, do not confuse a static load (like vehicle weight) with a dynamic load (like Load Limit). A tire must support loads greater than just the weight of the vehicle - e.g. cornering, hitting a curb,rock, pothole, etc.

HTH

 

[gaijin]

Thanks for the Toyo Article

I also saw this website
Which converts Passenger Tire Pressure to LT Pressure
I did a sample comparison for 305/45r22 and 33x12.5r22

Tire Pressure Calculator

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

For 305/45r22 hypothetically, if inflated @32psi it shows that it has a load rating of 2338/1.1 (adjusted load for suv)=2,125 lbs which is more than enough for Lc200 right? (2125*4=8,500 lbs)

Or would 35-40psi be better maybe for lesser rolling resistance?

Besides increasing load rating, Is there any advantage for running high psi Or its not really necessary?



View attachment 3882686

Further to my last:

FYI, here's what that web site shows for the 33X12.50R22LT tires:

Which, I believe, agrees with my first recommendation.

HTH

 

[LCStve]

I think you missed the most important first step in calculating Load Limits - determining the Load Limit for stock OEM tires on your vehicle.

For the LC200, that is a P285/60R18 tire @ 33psi which is a Load Limit of 2,512 lbs.

That means that P-Metric and ISO-Metric tires must meet or exceed a Load Limit of 2,512 lbs, and LT-Metric tires must meet or exceed 2,512/1.1 = 2,284 lbs.

Try your calcs again with these values.

Further, do not confuse a static load (like vehicle weight) with a dynamic load (like Load Limit). A tire must support loads greater than just the weight of the vehicle - e.g. cornering, hitting a curb,rock, pothole, etc.

HTH

For 305/45r22 According to tire calculator I have to inflate at least 36psi To have 2569 lbs

Although I dont understand why they didn't divide the load capacity by 1.1

Because if I set the Oem size to 305/45r22 @36 psi then the website divides it by 1.1 which will become 2335 lbs only

Therefore (I’m not sure), does that mean I would need to run at least 40psi for 305/45r22
2795/1.1=2,541 lbs

And as for the 33x12.5r22LT ( it said that LT tires dont need 10% load overage)
But i think It might no longer be suitable for Land Cruiser? since 2556 @78psi and its already very near max allowable pressure of 80psi

 

[gaijin]

For 305/45r22 According to tire calculator I have to inflate at least 36psi To have 2569 lbs

Although I dont understand why they didn't divide the load capacity by 1.1

View attachment 3882712

Because if I set the Oem size to 305/45r22 @36 psi then the website divides it by 1.1 which will become 2335 lbs only

View attachment 3882715

Therefore (I’m not sure), does that mean I would need to run at least 40psi for 305/45r22
2795/1.1=2,541 lbs

And as for the 33x12.5r22LT ( it said that LT tires dont need 10% load overage)
But i think It might no longer be suitable for Land Cruiser? since 2556 @78psi and its already very near max allowable pressure of 80psi

View attachment 3882723

OEM tire size is always P285/60R18 114 SL @ 33psi

Re-calculate with the correct OEM tire size.

 

[LCStve]

OEM tire size is always P285/60R18 114 SL @ 33psi

Re-calculate with the correct OEM tire size.

Ok therefore it should be at least 36psi
Thanks brother

 

[gaijin]

Ok therefore it should be at least 36psi
Thanks brother View attachment 3883134

You've got it!

And you are very welcome - always glad to help.

 

[Boston Mangler]

Terra Grappler G2 (my long favorite tire) are discontinued and have been for a bit.

They are now up to the G3s. Which came out literally a week after I got my Coopers

Unknown if G2 and G3 specs are the same, but might wanna check

 

[LCStve]

Terra Grappler G2 (my long favorite tire) are discontinued and have been for a bit.

They are now up to the G3s. Which came out literally a week after I got my Coopers

Unknown if G2 and G3 specs are the same, but might wanna check

Thanks G3 doesn't have 305/45r22 size