33" 35" tyres - why?

OK why do people put 33's or 35's (tyres) on their rigs??

Gives more clearance under the diff pumpkins & also adds clearance all round. They make it easier to climb over rocks/ledges etc. Say for example you drove upto a rock ledge with 31's on & it came half way up the tyre, drive upto that same ledge with 35's & it will be 2" further down on that tyre hence less tyre the vehicle has to push up & over that rock ledge. Hope this makes sense.

Cheers Jono.

How do you measure the 33" or 35" ?

I have Cooper Discoverer S/T 265/70R17's on my rig, so where do you measure the size from?

I went 33's cos I've got a 2 1/2 inch lift and wanted to fill in the guards a bit. I also only went A/T's because Im a learner.. One day I may get Katrol dirty and road tyres arent gonna cut it. Even the 33's have lifted the body, I reckon another 1/2 inch.

Quote:

---

Originally Posted by snicko

How do you measure the 33" or 35" ?

I have Cooper Discoverer S/T 265/70R17's on my rig, so where do you measure the size from?

---

Im sure theres a thread here somewhere................. Ive got 285/75/16's which aparently is the same as 33's
Someone else will probaly know more than me.. End of the day, I think sizes go on what you want them for, and has been suggested to me is runs 2 sets of rims.. A/T's and muddies.

265mm tyre width
tyre sidewall is 70% of the width of the tyre (there is 2 here as top and bottom of the tyres)
17" is the rim height

therefore
265mm x 0.7 x 2 x (1" / 25.4mm) + 17"
= 31.6"

Quote:

---

Originally Posted by katwoman

Im sure theres a thread here somewhere................. Ive got 285/75/16's which aparently is the same as 33's
Someone else will probaly know more than me.. End of the day, I think sizes go on what you want them for, and has been suggested to me is runs 2 sets of rims.. A/T's and muddies.

---

Thanks Kat. I would like to get a set of muddies but not sure what the right questions or extra work is..

I got over 2 sets of tyres its a PITA changing them for the wheeling I do. I went from 33" AT's and 35" Simex ET's to 33" Kumho KL's, more for touring duties.

Quote:

---

Originally Posted by Warnie

265mm tyre width
tyre sidewall is 70% of the width of the tyre (there is 2 here as top and bottom of the tyres)
17" is the rim height

therefore
265mm x 0.7 x 2 x (1" / 25.4mm) + 17"
= 31.6"

---

Wow a formula! Now I know why we had them in school!! Shame I was'nt paying attention!!!

So to get a 33" I would need to get................???

Quote:

---

Originally Posted by snicko

Thanks Kat. I would like to get a set of muddies but not sure what the right questions or extra work is..

---

The question you need to ask yourself is do you need mud tyres for the type of driving you do, and also do you need bigger tyres for extra clearence under your diffs. If you answered no to either of these questions then getting bigger mud tyres is a stupid thing to do. Staying with the correct tyre size does not void your insurance and you have more power with smaller tyre sizes. BUT if you want to get out there and get amonst it, a good set of All Terrains (Goodyear Duratrax, Mickey T 4 rib ATZ) or an easy going Mud terrain (KL71, KM2, Goodyear MTR, etc) in a 33 " will do you the trick.