Subtopic	Posts		Updated
	Is there a top or bottom to OME springs?	5		03/22 11:02am

By MA on Tuesday, March 20, 2001 - 02:05 pm: Edit

I have a 2" Rovertym lift on my Disco, and I am now in the market for some new rubber. I already ordered some 16" wheels with 4.25" back-spacing, so I am going to run larger tires(265/75-16). I heard from many people that this is a good size,but would I have to change the gearing? Do I have to recalibrate the speedo? Do I have to adjust anything(i.e. steering bumpstops)? Will the tires rub under full compression? How much trimming will I have to do?

By Mike on Tuesday, March 20, 2001 - 04:04 pm: Edit

I have the RoverTym 2" springs and the Rancho RS9000 shocks (9234's in the rear). I replaced the rear upper shock mount using the one from RoverTym and added RoverTym Quiet Cones. I still have the stock tires. This last weekend I had a chance to flex my Disco in the rear almost fully. The tire that ended up stuffing in the rear fenderwell rubbed against the bottom/rear lip of the fender well. If I had gone to the full drop, I feel certain that I would have ended up damaging the tire and the fenderwell. So, I am certain increasing the size of the tire using the Rancho RS9000 and RoverTym 2" spring setup will mean some trimming, but how much I do not know. Please keep us/me informed of your progress as tires are coming up soon for me too.

Thanks,
Mike

By Tom on Tuesday, March 20, 2001 - 04:06 pm: Edit

Hoo boy, what a lot of questions!! I will try to take a crack at them for ya...

As far as changing the gearing, you don't absolutely have to. I have 265/75-16's on for street use, and while the truck is admittedly a bit slower, it still suits me fine on my 100 mile a day round trip commute. Try it yourself and see.

For off-roading, other folks have reported that they lost some of the engine breaking for crawling down hill or power for climbing. I have only had the chance to go pretty hard-core once since my lift, but I think the truck still did just fine. However, I am still going to gear to 4.10's for even more performance since my off-road tires are bigger than the 265's and I am planning to go bigger in the future. Again, try it and see. New gears are an expensive proposition due to labor charges. Expect to pay around 400 for both gears and 200-300/diff in labor.

As far as your speedo is concerned, these tires will calibrate it for you!! A lot of people, including me, have noticed that the speedo is higher than the speed you are actually travelling. I tested mine stock with a GPS and found that when I thought I was flying along at 85 I was really only doing 75! After putting on the 265/75's, I am almost dead on compared to a GPS. I think this is because of the commonality between Disco's and Defenders that come with 265's stock. Also, as far as your first question about gearing, the speedo finally being accurate will make you think your truck is slower than it was before.

I did not have to adjust any steering bumpstops at all, as I too have the 4.25" backspacing rims. This is more than enough to accomodate this size of tire.

My tires do not rub at all under full compression on the inside of the wheel wells. The RT front and trailing links may have a bit of influence on that, but I am not sure...can somebody else help here?

Finally, as far as the trimming. For the front, if you have an ARB bumper or have the spoiler removed, you should be fine. Otherwise, some trimming will be needed, but how much I don't know. I have my endcaps cut and spoiler removed. For the rear, the same little amount that everyone else does will probably be enough. Check out the tech section.

Good Luck.

Tom

By Tom on Tuesday, March 20, 2001 - 04:08 pm: Edit

Mike, do you have stock rims or offset rims? Your rubbing is probably due to the offset of the stock rims.

By Tom on Tuesday, March 20, 2001 - 05:31 pm: Edit

Correction -- stock rims (5.something offset) or 4.25 offset rims...

By JEEPETR on Wednesday, March 21, 2001 - 03:07 am: Edit

Hello All,

Land Rover Stock Alloy Wheels are (to the best of my knowledge) 5.375" backspacing. 4.25" is a very popular change (L.R. Nato Wheels, Gulf Coast Rover Wheels), increasing the truck's track width just over 2". If you like your Stock Alloys (As I do) you can also go the spacer route. Bolting up a set of RoverTym's 1.25" Spacers will put you at 4.125" backspacing, increasing track width 2.5".

On another note, the often used terms of backspacing and offset, are NOT the same. Backspacing refers to the distance from the inner rim edge to the inner face of the wheel where it sits against the axle's hub. Offset is the distance from the wheel center to this face, and is measured in positive or negative, depending upon whether the offset is to the inside or outside of the wheel... Just an FYI

~Scott T.
'95 D-90 (JEEPETR)
'96 Discovery (New addition to the Addiction!)

By Tom on Wednesday, March 21, 2001 - 04:04 am: Edit

Scott...thanks for the correction. Always seem to switch those two words around.

Tom

By Bill Gill (Bluegill) on Wednesday, March 21, 2001 - 05:38 am: Edit

I'm lifting ~2" with OME this weekend, and I'll try on some 265/75/16's (on castor alloys) as soon as that thief uncle sam gives me my damn money back. I'm planning on shaving an inch or two off the bottom rear corner of the rear fenders. Also watch out for that little sharp lip protruding from below the top of the rear wheel well - my tire shop fitted a Disco with 265's and he immediately cut the tire on that sharp edge (I'll bash it flat with a mallet). I'll keep you informed of progress (with pictures, too!)

By Mike on Wednesday, March 21, 2001 - 03:09 pm: Edit

Re - Rubbing with Stock Rims
I have the stock tires and rims, Rancho RS9000 (9234's), an RoverTym 2" springs. When I fully extend the left rear shock, the left rear tire rubs the bottom/rear of the fender well. I think the new rear shocks will extend to almost 28.5 inches. I suspect the rubbing is due to the extremely long travel of the rear shock (on the extended side) which allows the stuffed wheel to drift back a bit. But I am really guessing here.

Thanks,
Mike

By Tom on Thursday, March 22, 2001 - 07:55 am: Edit

OK, i thought you were rubbing on the inside top of the wheel well, like on Ho Chung's pictures in the tech section of before and after spacers.

That is odd how you are rubbing inside the rear of the fender well with stock tires. This difference between your setup and mine that could be the culprit is the fact that you still have the stock shock mounts. This may lead to a different path of travel for the rear wheel. I have the RT shock mounts on the bottom that puts the shock in a slightly different position. Either this or the RT rear trailing links may be why I can get full stuff with a 32.3" swamper with no rubbing. You may want to check with/notify John of what you found so he can offer a suggestion or at least know about this potential "bug" in the design. If it is a big, I am sure he'll set you straight if he recommeded this setup. RT has great customer service!

Tom

By Simon on Thursday, March 22, 2001 - 09:39 am: Edit

I have 265's and 3 inch lift and rockware stuf, in full travel I rub the hell out of them...and against the part that can't be trimmed.. right under rear door...

I like the wider tire but the pizza cutters do better in fitting inside the well even when they are a bit taller than 265's

Simon

By Bill Gill (Bluegill) on Thursday, March 22, 2001 - 09:47 am: Edit

Simon, are you running 265/75/16's on stock alloy rims? What brand tire? I'm planning on installing a set of 265/75/16's after I lift with 2" OME this weekend...I'll reconsider if I'll rub at the part that CAN'T be trimmed (under rear door on the latch side where door meets body when door is closed). Might have to settle on 245/75/16...

By Tom on Thursday, March 22, 2001 - 09:57 am: Edit

With the RT trailing links you get spacers to solve this problem. I have one inch spacers in which push the entire axle backwards. I have 265/75-16's AT's for daily use on 16x7's. They don't rub either. My swampers are bigger and wider than the 265's as well.

As always, verify w/John.

Tom

By Kyle Van Tassel (Kyle) on Thursday, March 22, 2001 - 10:12 am: Edit

Keep in mind that those links really only rotate the housing. Your pinion angle suffers from too many spacers there...


Kyle

By Simon on Thursday, March 22, 2001 - 10:27 am: Edit

RTE might help... but I get the rubbing when fully stuffed.. and I rubb the sliders too...

took chunks off the outside lugs like it was butter... hehehee...

but I was fully stuffed and the disco was going Up and making a sharp turn making one wheel stuff inside and go forward....

i have the spare wheel kind

futuras MT's 265/75's

but this is only me... i might have bad bushings

Simon.

By nadim on Thursday, March 22, 2001 - 11:39 am: Edit

given that the BFG ATs are 31.7"tall, and 10.5" at the 'beely'...I have the TSLs at 32.2" and 10.5"...on stock aluminum rims, and they rum a little bit on the rear coil mounts, but nothing damaging.

the only mods i have done was to cut the rear wings as usual with everyone else...

next, i'll be getting the BFG ATs for everyday, and 33x10.5 TSLs for offroad...

i'll keep you guys posted.

By david b. on Friday, March 23, 2001 - 11:37 am: Edit

265/75-16 is about the same size as 31x10.5-15, right?...so it would be cheaper to go with the floatations. Can someone please help me, I have a 95 Disco with a Rovertym 2" lift(everything but the front radius arms). I want to get either 265/75-16 or 31x10.5-15, which one should I get? I am going to get either the 15x8(for the 31x10.5) or the 16x7(for the 265/75) AR wheels(with 4.25" backspacing).

By Bill Gill (Bluegill) on Friday, March 23, 2001 - 12:19 pm: Edit

Yes, 31x10.5-15" is about equal to 265/75/16(about as equal as you can get). 15" tires are generally cheaper - case in point: I'm picking up 265/75/16 Big O Bigfoot XT's for $163/tire msrp. My buddy is getting the same tire in 31x10.5-15" size for $143/tire. That's $100 difference for 5 tires (at msrp, which we won't be paying).

By mrbieler on Friday, March 23, 2001 - 12:31 pm: Edit

15" wheels will give you more tire choices at better prices. When 16" wheel catch up in terms of usage and popularity, that will eventually change.

If you're looking at 31x10.5-15", have you looked at the Interco Super Swamper SSR?

You can get good 15" steel off-road wheels for less then $50 each. After the second set of tires you put on them, they will be paid for.

Jeff

By Milan on Friday, March 23, 2001 - 12:59 pm: Edit

Actually, the 31x10.50R15's are typically around 30 - 30.5" tall. So, if the metric sizes are true sizes, the 265's would be a full inch taller. Do you guys know if the metric tires are typically sized as marked on the sidewall?

By Clint on Friday, March 23, 2001 - 05:04 pm: Edit

My kelly safari MSR 245/75-16 are 30" tall measured on the truck. The math says they should be 30.46" tall. The half inch is from the weight of the truck compressing one side. It appears as if the markings on my tires are pretty accurate.
Clint

265/75-16 should be 31.64" tall.

By MA on Monday, March 26, 2001 - 04:26 pm: Edit

yeah...I have made my choice, I will go with the 31x10.5-15 tires with AR 15x8 wheels and Goodyear Wrangler MT/R tires. thanks for all your help guys.

By Milan on Monday, March 26, 2001 - 05:27 pm: Edit

MA,
Let me know how it works out and how much trimming you had to do. I will go with the MTR also and I'm deciding between 235/85R16 or 31x10.5R15, 32x11.50R15 as they don't make the 265's yet.

By MA on Tuesday, March 27, 2001 - 12:51 pm: Edit

I called Rovertym a couple of days ago and he said that you will have to do the normal rear fender trimming, but he also said that you might have to trim a little bit off the front fender(on the back part, where the plastic sill is). That is if you don't get the front radius arms I think.

By Milan on Tuesday, March 27, 2001 - 01:56 pm: Edit

So with 32's the trimming would be more severe, I assume. I guess 31's it is. I will wait for your report once you actually install them.
Thanks.

By MA on Wednesday, March 28, 2001 - 12:51 pm: Edit

Milan, I won't be installing the suspension until mid-late June(i'm only a 16 year old kid looking for a summer job to get the money for the suspension,BTW I got my disco cheap b/c the previous owner didn't want to fix the "small" problems in it). I'd ask around more before you do anything. Call Rovertym first and tell them your situation.

By Milan on Wednesday, March 28, 2001 - 01:35 pm: Edit

Thanks MA,
I'm in no hurry right now either. When you do get around to it just post the results here. I'm sure I'll check them out. Otherwise it's no big deal I'll figure it out once I finalize what I want to run.

Man, do I wish I was 16 and had a Disco. Good luck with the job search.