[larjeep]

Are there any big differences in these two sizes. Looking at the ridge grappler. Ruled out the 285,.,
Looking to go with the 305 probably. And have 2013' with 373's.
Thanks

 

[ScaldedDog]

The 35 is a more or less true 35, and the 305 is a 34. Roughly the same width. What other info are you looking for?

Tiresize.com

Mark

Sent from my SM-G935V using Tapatalk

 

[jgraz]

The 35 is roughly +3/4" diameter, +1/4" width, and +6 Lbs

 

[jgraz]

The 35 is a more or less true 35, and the 305 is a 34. Roughly the same width. What other info are you looking for?

Tiresize.com

Mark

Sent from my SM-G935V using Tapatalk

I have the 35's and I can tell you it is not a true 35". Mine measure out to 33 3/4" at 34PSI. That seems to be the norm.

 

[stumblinhorse]

Are there any big differences in these two sizes. Looking at the ridge grappler. Ruled out the 285,.,
Looking to go with the 305 probably. And have 2013' with 373's.
Thanks

I see both of your threads on tire size. You can easily calculate the difference in the "stated" size from the manufacture. It is just metric vs standard. My tires have both standard and metric sizes on the them. The first number is the width in mm, the second is the ratio of the height to the width and last number is the rim size in inches. 305/25.4 is 12", then 70% of 12 is about 8.4". 2 sidewalls is 16.8" plus the rim size is 33.8". So a 305/70/17 might have another number on it like 34/12/17... like my 285/75/17 toyo's also say 34/10.5/17 on them.

Bear in mind that stated tire size is not the same as actual mounted and aired up size. Mounted on the jeep tires are smaller...

 

[jadmt]

when in doubt always go bigger. everybody makes that mistake some of us make it many times. go bigger learn from those who have walked before you.

 

[Bbear17]

Go to tiresize.com to see what the specs are for each tire and decide if its what you want. Its all personal preference.

https://tiresize.com/tiresizes/305-70R17.htm

 

[larjeep]

My dilemma is that I'm not sure if one is going to be a big difference than the other one when driving the jeep.
Basically will there be a big difference in tire size as to the effect on the jeep. How did you performed with one make that one better than the other or is there not much difference in the performance of the jeep with either tire size

 

[stumblinhorse]

Diameter makes a difference across the board. Gearing, shifting, speed etc. Width has a small impact. Overall size impacts the lift required as well. And it impacts the backspacing that is required to run them. It is all up to you. IMHO 285/70/17 is the largest tire that should be run on 3.73. But that is me. For every person that says what I am saying, there is another that says 35's with 3.21 or 3.73 is just fine... I have 285/75/17 on 4.10s and that is the absolute limit for 4.10s on a 3.6.

 

[jadmt]

between 315/70-17, 285/75-17, 305/70-17 and 35/12.5-17 you are not going to notice a big difference seat of the pants. You will notice a difference between each of those sizes and your stock tires. One nice thing about Toyo tires is they have a 500 mile I think its 45 day satisfaction guarantee. If you don't like them for any reason you can return them and get your money back including labor it is a no brainer. I have went with Toyo several times and never returned them because they were great.

 

[jadmt]

Diameter makes a difference across the board. Gearing, shifting, speed etc. Width has a small impact. Overall size impacts the lift required as well. And it impacts the backspacing that is required to run them. It is all up to you. IMHO 285/70/17 is the largest tire that should be run on 3.73. But that is me. For every person that says what I am saying, there is another that says 35's with 3.21 or 3.73 is just fine... I have 285/75/17 on 4.10s and that is the absolute limit for 4.10s on a 3.6.

I have run 2 sets of 35's and 2 sets of 285/75-17's on two different rubicons that have had 4.10's and automatics. I could tell 0 difference between the 285/75-17 and the 35's the 285/75-17 have been Toyo AT2 and currently Cooper ST Maxx and the 35's were toyo at2 and toyo r/t. As far as difference in diameter there is very little between any of those I listed.
here are the 285/75-17 and 35 toyos and a smaller cooper 275/70-17

 

[ScaldedDog]

I have the 35's and I can tell you it is not a true 35". Mine measure out to 33 3/4" at 34PSI. That seems to be the norm.

Yep, which is exactly what a 35" should "measure" under load. Remember you lose the crown - roughly .5" on a 12.5" wide tire - under load, and you lose two of them per diameter. Since the average 35 only starts out around 34.7 or 34.8", the weighted rolling diameter ends up about 33.75".

I bet if you use the revs/mile number on tiresize.com and calculate the diameter (really the weighted rolling diameter) from that, you'll get very close to your 33 3/4" estimate.

OP, Stumblinhorse nailed it, IMHO. There won't be a large drivability difference between the two sizes you're considering, but there will be a little, driven almost entirely by the differences in diameter and the effect it has on effective gear ratio and fitment. If you are coming from a smaller tire, then the drivability difference between what you have now and whichever one you pick will be noticeable.

Mark

 

[jgraz]

Yep, which is exactly what a 35" should "measure" under load. Remember you lose the crown - roughly .5" on a 12.5" wide tire - under load, and you lose two of them per diameter. Since the average 35 only starts out around 34.7 or 34.8", the weighted rolling diameter ends up about 33.75".

I bet if you use the revs/mile number on tiresize.com and calculate the diameter (really the weighted rolling diameter) from that, you'll get very close to your 33 3/4" estimate.

OP, Stumblinhorse nailed it, IMHO. There won't be a large drivability difference between the two sizes you're considering, but there will be a little, driven almost entirely by the differences in diameter and the effect it has on effective gear ratio and fitment. If you are coming from a smaller tire, then the drivability difference between what you have now and whichever one you pick will be noticeable.

Mark

Yep and I have no idea what I was thinking when I typed what I did. I forgot all about load

 

[Bob Sanders]

I went with the 305's. My thinking was that you're really not going to notice any differences in height with 35's. It's too small a difference... but you MIGHT notice a difference in rubbing and gearing.

305's compared to stock:

 

[larjeep]

I went with the 305's. My thinking was that you're really not going to notice any differences in height with 35's. It's too small a difference... but you MIGHT notice a difference in rubbing and gearing. 305's compared to stock:

Thanks. How does it drive with them. And what gear do u have.

 

[freebird_78]

One thing I'm noticing on the spec sheet for the Ridge Grap is that there is a fairly significant difference in weight between the 305s (68 lbs) and the 35s (75lbs), or about 10%, which is why I'm leaning towards 305s.

 

[Bob Sanders]

Thanks. How does it drive with them. And what gear do u have.

I have 373 gears. Don't notice a change at all in performance.

The handling is quite a bit different though. With that much rubber on the road you feel the dips and crevices a lot more.

 

[TerryC6]

One thing I'm noticing on the spec sheet for the Ridge Grap is that there is a fairly significant difference in weight between the 305s (68 lbs) and the 35s (75lbs), or about 10%, which is why I'm leaning towards 305s.

Well the tire is an inch tall and 1/4 of an inch wider so that would account for that 10 pounds. SO much about weight is just in how the tire is constructed. Those tires are E rated and they will always be heavy. On the other hand if you where looking at Goodyear Kevlar's there is only 3 pounds difference between the tires, the 305 is D rated and the 35's are C rated.

 

[jadmt]

One thing I have noticed is the MTR's run pretty big compared to some other brands in like designations and even models in the Goodyear lineup. I have not actually seen the 305's in person but have the 35's and 37's and they seem bigger than most 35's or 37's other than say pitbulls or Intercos. I have seen them in action in Moab and can't think of too many tires that would do better in Moab than the MTR's. I wish they were not so spendy tho.

 

[TerryC6]

Actually I was wrong in the MTR the 305 and the 35 weight the same. I just like they have a C rating. I love my Mickey's but I would really like a tire without the e rating.