By Art on Monday, August 13, 2001 - 05:54 pm: Edit

I was wondering what people thing about the two sizes. Is it better to go with with 265 and have a wider tire, or does that not make any diff. at all. 235 are cheaper, and about the same as the 265. Got any input?

By ryan on Tuesday, August 14, 2001 - 04:50 am: Edit

235/85 is better. Discos prefer tall and narrow tires. You will have tracking problems with 265/75 because of its width. Are you planning to re-gear for either of these sizes?


You can do a search in the archives, this has been discussed several times.

By RVR OVR (Tom) on Tuesday, August 14, 2001 - 05:08 am: Edit

Disco's prefer tall and narrow tires?

Ummmm...Huh?

By Kyle Van Tassel (Kyle) on Tuesday, August 14, 2001 - 05:11 am: Edit

Mine likes em better. Handles better.. The 265 gives a smother ride but its not the same as that tall and skinny..

Kyle

By Discosaurus on Tuesday, August 14, 2001 - 06:32 am: Edit

tall and skinny - all the way !!

yeah, baby !

keith
discosaurus

By Bud on Tuesday, August 14, 2001 - 06:34 am: Edit

Kyle - Did you regear?

Bud

By ARog on Tuesday, August 14, 2001 - 06:52 am: Edit

Aren't we talking about a RR here anyway?

By Ho Chung (Ho) on Tuesday, August 14, 2001 - 06:57 am: Edit

85 series tires are cheaper just because they are cheaper. not because they are any lesser than 75 series.

i prefer the 85 series.

By Kyle Van Tassel (Kyle) on Tuesday, August 14, 2001 - 10:35 am: Edit

Yeah Bud , I regeared.

Kyle

By Discosaurus on Tuesday, August 14, 2001 - 10:47 am: Edit

I haven't regeared.

I run a 5 speed which must have much different ratio's then the autobox. My revs at 70 MPH are almost identical to Alex Schubow's who has an autobox with 4.11's and the same tires - ~3000 RPM.

I think highway revs would be way too high if I went with 4.11's.

keith
discosaurus

By Ho Chung (Ho) on Tuesday, August 14, 2001 - 10:51 am: Edit

keith, if you regear you'd not be worried about your hwy rpms... you'd have a real big smile on your face.

trust me on this one.

By Redsrover (Redsrover) on Tuesday, August 14, 2001 - 01:47 pm: Edit

If you don't regear, what is the impact on highway speeds and rpms???

Ron

By hank on Tuesday, August 14, 2001 - 03:21 pm: Edit

whats regear?

By Redsrover (Redsrover) on Tuesday, August 14, 2001 - 03:47 pm: Edit

Change gearing from stock to 4.11 is what I mean. Don't do it and add 235 85s and what can I expect so far as off-road, in town and highway performance with a relatively fresh 4.0 engine.

By hank on Tuesday, August 14, 2001 - 04:01 pm: Edit

thanks

By Art on Tuesday, August 14, 2001 - 04:23 pm: Edit

We were Talking about a RR.

By gil on Wednesday, August 15, 2001 - 02:40 am: Edit

Im with keith on the 5-speed ratio thing. I run 265/75 with stock gears in my 97 5-speed, and Im still "quicker" than a stock autobox Disco.

By ryan on Wednesday, August 15, 2001 - 06:00 am: Edit

Doesn't the Disco's 5-speed have the same gear ratios as the D-90's? I know the automatics are different.

By Ron on Wednesday, August 15, 2001 - 06:14 am: Edit

The T-box gearing is different between D90 and disco not tranny (I think )

By ZPukajlo on Wednesday, August 15, 2001 - 06:43 am: Edit

Since the torque converter is biased towards off-roading it doesn't leap off the line. So, a 5-speed should be faster right?
The T-box gearing on a D90 is the same as my '97 D1. It's 3.32 to 1. DII's have a 3.269 to 1 ratio. So, it must be the tranny. Let me know if I am wrong.

By Ron on Wednesday, August 15, 2001 - 06:58 am: Edit

I thought it was the overall ratio: they range from 1.6 to 1 to .996 to 1

Not the hi-low. The overall.

I also think the ratios in the auto box only changed based on engine not vehicle and the same for tranny but like I said this is not 100%.

Ron

By ryan on Wednesday, August 15, 2001 - 09:21 am: Edit

2 questions...
Will 235/85 fit a RTE 2" lift with AR steel wheels?

What will be effected if I run the above combo on my 96' D1 with a 5-speed?

By JEEPETR on Wednesday, August 15, 2001 - 10:06 am: Edit

Hey Ryan,

I've run 235/85 -16 Dunlop Mud Rovers on my '96 Discovery (5-speed) with 1.25" wheel spacers. They will fit with 2" of lift (I have about 2.25" of lift on my Disco), though you will definately need to trim the rear wheel wells before leaving the pavement. As for Power, it is a noticable hit. Acceleration still seems fair, however the trucks ability to maintain speed on hills in top gear will not be very good. You will also notice that you have to adjust your take offs with stock gears, as the motor will tend to bog. It's livable, but I don't think I'd want to go up to the 235's without changing the gears. If you tow anything, I'd definately recommend against the 235's as everyday tires without a gear change.....

~Scott T.
'95 D-90 (JEEPETR)
'96 Disco (5-Speed)

By ZPukajlo on Wednesday, August 15, 2001 - 11:36 am: Edit

Ron,

If you are talking about high-range then pre-98's have a 1.222 to 1 ratio. Post-98's have a 1.211 to 1 ratio. As for the tranny's I believe that only the M/T's differ in ratio's. The A/T's use the same ratio. Like yourself I am not 100% sure on this one.