35 inch tyres.

[marty and co]

Hey,
I have been thinking about fitting some 35 inch tyres to my disco. I have read on a few threads that the 35 x 12.5 will rub on the steering. Can anyone tell me if they think that a set of simex 35 x 11.5 will still rub or would I have to drop it down even further to a 35 x 10.5

Thanks peoples

[Vern]

adjust the steering stops to stop it rubbing, simple:)

[Benny_IIA]

simex are normally big for there 'size'.

wheel spacers or off set wheels will help to.

[blitz]

be prepared to spend money or have a workshop to fit 35's - if you dont have off set wheels you will have the turning circle of the titanic - off set wheels also your brakes will not be as good think about upgrading to RR vented ones, flares will be a must, you will need at least a 2" spring lift and possibly a 2" body lift., longer brake lines and so the list goes on.

seriously do research on it before you buy them as you may be making an expensive mistake - but if you do it right and get it engineered then it will be near unstopable

[nicho]

Have deep pockets i though mine were deep enough i fitted 35x12.5 Mickey Thompson MTZ's to mine and im still spending. gears are a must if you dont want to slow down on hills and everything you thought would break will break. Upgrade axles new raduis arms and trailing arms to adjust the castor back maybe double carden joint front prop shaft, sway bar droppers, 2 to 3 inch suspension 2"body lift flares camel cut, Std brakes are crap with 35's (even brand new everything) Like Blitz said research research research

[Disco_owner]

Fitting 35" is not a cheap excercise

This is my disco with BFG KM2 muddies


2.5 " inch White Tiger Lift Kit
Extended Brake lines
Offset LRA Rims for better steering
Flares
4.11 diff ratio because of bigger wheels
front and rear Diffs upgraded to Maxi Drives with Axles.

Also you'll need to modify your front and rear bars as they will look absolutely Hideous at the standard height with 2.5 inch" lift:p

And in the end you'll need to get it engineered.:(



https://www.aulro.com/afvb/images/imported/2011/06/265.jpg

[boofdtl]

Thats a nice looking disco you have.
I am thinking of going to 285/75/16 with some diff off set rims so hope it works out for you mate they do look good all done up..

[tassydisco]

Fitting 35" is not a cheap excercise

This is my disco with BFG KM2 muddies


2.5 " inch White Tiger Lift Kit
Extended Brake lines
Offset LRA Rims for better steering
Flares
4.11 diff ratio because of bigger wheels
front and rear Diffs upgraded to Maxi Drives with Axles.

Also you'll need to modify your front and rear bars as they will look absolutely Hideous at the standard height with 2.5 inch" lift:p

And in the end you'll need to get it engineered.:(



https://www.aulro.com/afvb/images/imported/2011/06/265.jpg
totally agree with you DISCO OWNER. Have basically done all this to mine to run 35 inchX12.5 Mickey T's. All these mods are a MUST and more because will things continally break. Gotta weigh up if its really worth it, definately wouldn't recomend if its just for looks. If i did it again i'd nearly be leaning towards 33's, as they will get you most places the 35's will with less stress and a bit better handling on road. But if you want to do it make sure you have a bit of $ to spend and research! - adam (p.s. for a full run down on what i had to do to mine check it out in 4wd Action mag #164, or on DVD #165! :))

[tassydisco]

Thats a top job on you're disco DISCO OWNER by the way, looks very neat!:)

[2_door]

Hey,
I have been thinking about fitting some 35 inch tyres to my disco. I have read on a few threads that the 35 x 12.5 will rub on the steering. Can anyone tell me if they think that a set of simex 35 x 11.5 will still rub or would I have to drop it down even further to a 35 x 10.5

Thanks peoples

35's look great on the D1 but like the others have said, you cant just bolt them on, there's alot of work that has to be done to make sure they are practical.

this is my old truck on 35's

https://www.aulro.com/afvb/images/imported/2011/07/1405.jpg

at a minimum you will also need

15x8 rims with a -25 offset (to stop the rubbing)
flares and a mudguard cut
2 inch coil lift
2 inch body lift
toughened front and rear axles (the tooth pick OE ones will break)
4.11's to get it to drive properly
somewhere to hang the spare as it wont fit on the rear door

and you can guarantee something else will break when driven hard, just fix it as you go along :eek:

oh, and yes it will have to be engineered, well doesnt have to be but your insurer and Mr Plod will have a nice chat if they ever find out :angel:

[marty and co]

Ok ok, I have decided to go for 33s insted! What mods am I going to need to fit them? Also what size are the standard wheels, 29?

[zuno555]

lol, yes 33's or 35's on a disco is a big expensive operation :)

Almost everything said has to be done even to fit and run 33"s.............

Standard tyres I think are 225/75R16 which works out to approx 29"

I just went from 33" muddies to 35" BFG All Terrains - and it drives about the same, if not better on road. I run 4.11 ratios through auto tdi. The 33"s were 285 (11.5" wide), no rubbing even at full lock, on -25 offset steelies. The 35"s are 315 (12.5" wide) and just rub the radius arms on full lock.

Standard brakes are somewhere between terrible and dangerous, and that is brand new discs and pads. Although it is due for new fluid and bleed.

I have been told that you can only engineer 33's not 35's, but I have not looked into it. Like said, you don't have to get it engineered, until something goes wrong............

BTW, a disco with 32" simexs will out drive a 33 or 35" AT or Mud tyre, unless getting hung up on diffs, so if you are going simex style tyres you might not need as big a size as you think. But it will be terrible on road, so will need 2 sets of tyres if its a daily driver not a pig.

Also after going to big tyres then you will also want to spend more on engine etc to get back some performance.......... Many more $$$.

Do a complete costing before starting anything, plan exactly what you want the disco to become.

[nicho]

Costs a truck load to run the 35's but how sweet is it cruising up those tracks. With the lift required and the wider footprint they are so stable and comfortable to drive. I contemplated going down to 32's because of the legalities but I love driving my disco with the 35's and reckon I will even more once I get my new diff locks and gears in. So there is buckleys chance of me going back

[nicho]

somewhere to hang the spare as it wont fit on the rear door


Just do what I did take off the rear bar cut a section out under where the wheel hangs and weld in a plate. Bingo 35" hanging off the back of my disco no problem and it looks awesome

[Foxspell]

be prepared to spend money or have a workshop to fit 35's - if you dont have off set wheels you will have the turning circle of the titanic - off set wheels also your brakes will not be as good think about upgrading to RR vented ones, flares will be a must, you will need at least a 2" spring lift and possibly a 2" body lift., longer brake lines and so the list goes on.

seriously do research on it before you buy them as you may be making an expensive mistake - but if you do it right and get it engineered then it will be near unstopable


Everyone talks about upgrading the brakes, Blitz here states to go to RR vented rotors, is this just a rotor replacement or do I need to replace the calipers also?
Is another option to just change calipers to ones with larger pistons and if so which RR/Disco's/Defenders had the larger calipers?

Apologies if I am hijacking this thread however I believe that this is a major factor when considering an increase in tyre size.

Love this forum

[blitz]

Everyone talks about upgrading the brakes, Blitz here states to go to RR vented rotors, is this just a rotor replacement or do I need to replace the calipers also?
Is another option to just change calipers to ones with larger pistons and if so which RR/Disco's/Defenders had the larger calipers?

Apologies if I am hijacking this thread however I believe that this is a major factor when considering an increase in tyre size.

Love this forum

Definitely not hijacking as it is all related to the same topic

The reason why I said RR conversion was because it made so much difference to mine, which could have been because mine were so stuffed a piece of cheese in there would have made an improvement:D

They are basically the same except vented instead of solid so naf all fade, a spacer is fitted in the standard calipers so that the wider vented ones can fit. Had I know about this and was 100% sure it was correct that is what I would have done to mine instead of the RR conversion. The main reason why I did that was because I put a RR 4.6 in her and thought it would keep Mr plod happier. (and because I needed a boat anchor to help it stop)

i believe the defender calipers have a larger piston and can be fitted - someone on here with more knowledge will either say yes or tell me I'm full of it. I have also been told that braided brake lines help as then there is zero expansion of the line as the brakes are used but again not 100% sure if this is correct or not.

[nicho]

Just fitted new diffs to my D1 with 4.75 gears and lockers it has acceleration again with the 35's. Can't wait to test them off road :-)

[zuno555]

Yes indeed, 4.1 are too low for 35's, goes ok but it misses the extra revs on hills....

100kmh its about right on 1500rpm, not too much power there when you hit a hill, or a headwind for that matter (300tdi)

Might look for a set of 33 AT's, better for the 4.1's........

[rovercare]

Definitely not hijacking as it is all related to the same topic

The reason why I said RR conversion was because it made so much difference to mine, which could have been because mine were so stuffed a piece of cheese in there would have made an improvement:D

They are basically the same except vented instead of solid so naf all fade, a spacer is fitted in the standard calipers so that the wider vented ones can fit. Had I know about this and was 100% sure it was correct that is what I would have done to mine instead of the RR conversion. The main reason why I did that was because I put a RR 4.6 in her and thought it would keep Mr plod happier. (and because I needed a boat anchor to help it stop)

i believe the defender calipers have a larger piston and can be fitted - someone on here with more knowledge will either say yes or tell me I'm full of it. I have also been told that braided brake lines help as then there is zero expansion of the line as the brakes are used but again not 100% sure if this is correct or not.

Correct, defender calipers are the go, huuuuuge improvement

[rovercare]

Yes indeed, 4.1 are too low for 35's, goes ok but it misses the extra revs on hills....

100kmh its about right on 1500rpm, not too much power there when you hit a hill, or a headwind for that matter (300tdi)

Might look for a set of 33 AT's, better for the 4.1's........

Your tacho is out;)

[dirtdawg]

Matt, are the defender calipers a straight bolt up or does it require mods

[rovercare]

Matt, are the defender calipers a straight bolt up or does it require mods

Bolt on

[blitz]

2 questions regarding the defender calipers

Are they the same physically with larger pistons

do defenders have vented discs

my reason for asking this is I like the idea of the defender calipers but after having spent a considerable amount on the brakes it would be great if I could just fit the insert to the defa calipers to fit to my old girl

Or just bolt straight up

[rovercare]

2 questions regarding the defender calipers

Are they the same physically with larger pistons

do defenders have vented discs

my reason for asking this is I like the idea of the defender calipers but after having spent a considerable amount on the brakes it would be great if I could just fit the insert to the defa calipers to fit to my old girl

Or just bolt straight up

Calipers are different, also pads. Some are vented

Calipers are cheap as, new, from the UK

You going from not being able to lock a wheel on gravel...... To being able to flat spot your tyres on dry Asphalt

[rovercare]

On my old rr I had ebc greenstuff pads, slotted and drilled rotors, braided lines, reco everything....... Wouldn't waste the time again! Straight to fender calipers and genuine pads, instand brake upgrade

[Foxspell]

Where should I be looking in the UK for the calipers and is it only front or both front and rear that I am looking for?

Thanks heaps,

Lee

[nicho]

Any particular model or year defer or are they all the same?? All my brakes are new and calipers rebuilt but it still doesn't stop good so would it make much difference if I just changed calipers or does it need the vented discs too for clearance reasons??

[zuno555]

Your tacho is out;)

Ok, I have wondered this before, but idle is set right at around 720 rpm, and it sound like engine is only plodding along at 1500 so what could it be? The only thing I can think of is if the altenator pulley is the wrong size...

So what should the correct rpm be at true 100kph through auto with 4.1 diffs and 35s?

[rovercare]

Any particular model or year defer or are they all the same?? All my brakes are new and calipers rebuilt but it still doesn't stop good so would it make much difference if I just changed calipers or does it need the vented discs too for clearance reasons??

Most are the same, I believe

Vented discs don't help braking ability at all, just help with fade with lots of applications

[rovercare]

Ok, I have wondered this before, but idle is set right at around 720 rpm, and it sound like engine is only plodding along at 1500 so what could it be? The only thing I can think of is if the altenator pulley is the wrong size...

So what should the correct rpm be at true 100kph through auto with 4.1 diffs and 35s?

Google up a ratio calculator, it will tell you

[zuno555]

Okey after some googling to find the zf ratios used in discoveries I found:

4.1 diffs 35" tyres 100kmh 0.728 ratio = 1777 rpm.

So my alternator must have been changed from small pulley to big pulley then at some stage? I definitely have the larger belt on 1595mm.

That brake upgrade sounds very interesting too, will have to look into that. I couldn't even lock up the 33's on road if I tried with new rotors and pads.

[blitz]

just ebay'd defender calipers $183-00 buy now single not pair and new not second hand

then you would need pads as well - bloody cheap given the spacer for my disco calpiers were $500-00 to buy then labour on top

Sounds like a plan to me now to get a job so I can pay for them

[rovercare]

Okey after some googling to find the zf ratios used in discoveries I found:

4.1 diffs 35" tyres 100kmh 0.728 ratio = 1777 rpm.

So my alternator must have been changed from small pulley to big pulley then at some stage? I definitely have the larger belt on 1595mm.

That brake upgrade sounds very interesting too, will have to look into that. I couldn't even lock up the 33's on road if I tried with new rotors and pads.


Remember 1.22:1 high range also

[blitz]

A thought does anyone know if the defender brake booster is larger than the disco one? it would make sense as the calipers are larger, if this is so when fitting the defender calipers would it be worth fitting the defender booster as well?

[blitz]

I have 275/70/16's on mine and I must admit I nearly have to put my foot through the floor to do it and have my bum off the seat pushing so hard but I can get my disco to lightly skid on the black but it is a hell of an effort

[nicho]

A thought does anyone know if the defender brake booster is larger than the disco one? it would make sense as the calipers are larger, if this is so when fitting the defender calipers would it be worth fitting the defender booster as well?

What about the master cylinder too

[blitz]

What about the master cylinder too

yeah I should have said the whole assembly, logic would say that if more volume is being used in the piston then a larger booster and master cylinder would be required

[nicho]

ok so since my discs are only 10k old (once they need replacing replace with ventilated) then all i have to do is find 4 defer cailpers a booster and a master cylinder then my dozer will stop and i wont have to use the car in front to stop me from going through a red light. Sweet now all i have to do is save like a mad man again.
Thanks Blitz

[rovercare]

ok so since my discs are only 10k old (once they need replacing replace with ventilated) then all i have to do is find 4 defer cailpers a booster and a master cylinder then my dozer will stop and i wont have to use the car in front to stop me from going through a red light. Sweet now all i have to do is save like a mad man again.
Thanks Blitz

Wouldnt Change booster and master, also wouldn't worry to much about vented rotors unless your towing, good idea if doing the lot at once, but not seeing as you've just replaced them

[nicho]

You don't think with a bigger set of calipers I won't need a bigger master cylinder. Or is the defer one the same?

[loanrangie]

You don't think with a bigger set of calipers I won't need a bigger master cylinder. Or is the defer one the same?

Stock booster and mc will be fine, you only need 2 calipers as the rears arent vented.

[blitz]

Sweet, as I have only just fitted vented discs about 5k ago this should be a very easy job.

would be nice to throw away the anchor - it would free up some space (it might even make the missus like it a bit more)

[rovercare]

Stock booster and mc will be fine, you only need 2 calipers as the rears arent vented.

You need 4 calipers, they have larger pistons and good to match

[nicho]

You need 4 calipers, they have larger pistons and good to match

If its good to match then wouldn't it make sense to use the MC as well. common sense would say that larger pistons would require a larger MC to give them appropriate pressure! I need to make sure 100% so when i take mine for engineers i have it spot on.

[rovercare]

If its good to match then wouldn't it make sense to use the MC as well. common sense would say that larger pistons would require a larger MC to give them appropriate pressure! I need to make sure 100% so when i take mine for engineers i have it spot on.

Not really, mismatching piston size dramatically changes the bias between front and rear, different master will effect pedal effort

[nicho]

So if i wanted a better pedal & better brakes then go the Master and Calipers! and when my disks wear go for the ventilated units

[blitz]

Would changing to defender calipers, booster and MC would require an engineers approval?

[nicho]

Would changing to defender calipers, booster and MC would require an engineers approval?

I'm going to need engineers approval anyway so as long as they work better than original then i'm one step ahead :)

[blitz]

I'm going to need engineers approval anyway so as long as they work better than original then i'm one step ahead :)

It's the sort of thing that I doubt would ever be found but then again if it was and that was an out for the insurance company not good