S

shaunb2074

New Member
I ordered the wrong size tyres (I wanted 235 and ordered 265) but now I want to make these fit but, I'm new to all this offroading and changing tyre size. I've just seen that I need to modify;
Rear fender trimming
Front endcap trimming
Steering stops
Possible bump stop height.
Spacers needed for spare tire.

so my question is how important are steering stops and bump stop height? and how much trimming needs to be done? is there any tutorials out there?
I will also be fitting a 2 inch suspension lift before fitting

thanks in advance
 
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Disco 1 or 2? A colleague of mine fitted them on his D2 (with OME suspension) without any bodywork trimming at all. Not sure what else he did regarding your others points, although he did turn his spare wheel carrier around.
 
Just fitted 265/75/16 Maxxis Bighorn MT764 on my Discovery 2 with Range Rover alloys 16x8 et52 and the only part it rubs on mine is the left arch liner on full lock. I haven't adjusted steering stops or anything, no rubbing on radius arms either. Got a good bit of flex going on standard suspension too and the tyres didn't contact the body or arch on front or rear.

Hope that helps!
 
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Better sell those big tyres and get what you initially wanted cos for those tyres you'll need a remap and larger intercoller or the car will be sluggish also you'll need at least a EGT gauge but better a coolant temp one too, the consumption without tuning will noticeably go up as well

i fitted only 3.5% bigger than standard tyres(255/70/16) on mine and the EGT increased with up to 100 degrees and the consumption with around 10% also before that the ECT rarely reached 100 degrees uphill towing and now it goes to 105 without trailer ... and i have remap and larger intercooler , also the ABS system will be mixed up with those tyres... i explained few times ...max 5% difference in tyre size is acceptable to not create issues on a long run and 265/75 is almost double of that... you was warned... if somebody tells you it's ok without tuning ask him if he has EGT and coolant gauges fitted cos otherwise the OK thing is irrelevant ...these two elements are like rust will act slow but sure untill the engine is gone for good though it depends how long you want it to last
 
shaunb2074 said:
I ordered the wrong size tyres (I wanted 235 and ordered 265) but now I want to make these fit but, I'm new to all this offroading and changing tyre size. I've just seen that I need to modify;
Rear fender trimming
Front endcap trimming
Steering stops
Possible bump stop height.
Spacers needed for spare tire.

so my question is how important are steering stops and bump stop height? and how much trimming needs to be done? is there any tutorials out there?
I will also be fitting a 2 inch suspension lift before fitting

thanks in advance
Click to expand...
First off. What vehicle is it?

Second, you really ought to try and understand what things like steering stops and bump stops are and what they do, BEFORE planning on adjusting or modding them.

Third, why a lift kit? I'm not saying you shouldn't or don't need it. But my hunch is, that it is completely redundant and stands a very good chance as reducing your vehicles off and on road ability.

Forth, a 235/85 and 265/75 R16 are similar heights. Or did you mean 235/75R16? Which is quite a bit smaller?

Fifth, what sort of use are you planning for the vehicle? As this will dictate what may need to be done. To coin an American phrase, if all you want is a "mall crawler", then fitting over sized wheels can be quite simple. If however the vehicle is to be used off road properly, those same wheels may cause a lot more issues and require a lot more mods/effort/alterations to solve.

Sixth, there is a link in my sig that you may (or may not ;) ) find of interest.

:)
 
300bhp/ton said:
First off. What vehicle is it?

Second, you really ought to try and understand what things like steering stops and bump stops are and what they do, BEFORE planning on adjusting or modding them.

Third, why a lift kit? I'm not saying you shouldn't or don't need it. But my hunch is, that it is completely redundant and stands a very good chance as reducing your vehicles off and on road ability.

Forth, a 235/85 and 265/75 R16 are similar heights. Or did you mean 235/75R16? Which is quite a bit smaller?

Fifth, what sort of use are you planning for the vehicle? As this will dictate what may need to be done. To coin an American phrase, if all you want is a "mall crawler", then fitting over sized wheels can be quite simple. If however the vehicle is to be used off road properly, those same wheels may cause a lot more issues and require a lot more mods/effort/alterations to solve.

Sixth, there is a link in my sig that you may (or may not ;) ) find of interest.

:)
Click to expand...

As 300bph has said numerous times in the past, it depends on what you want to do with the vehicle.

It often makes me wonder why someone would buy a perfectly capable vehicle and then they start "modding" things with such items as lift kits with little or no knowledge of or regard to the consequences which can screw up both the on and off road handling. Then they go fitting huge knobbly tyres and wonder why the already crap turning circle is even worse and the whole thing handles so badly that it's a death-trap at anything over 10 mph on a flat surface, although in this case, the OP did order the wrong tyres and while he should have coughed up and made arrangements to replace them with the right ones, he's decided to modify the vehicle to fit the tyres instead.

Sensible mods are rarely noticed, such as extended breathers, underbody protection, etc.

"Tongue in cheek" .......
Poseur mods are the ones which most often seen but generally don't do much for the operation of the vehicle in adverse conditions, here you can include such useful items as the Tesco carpark snorkel, the pretty little winch with built in pressure washer that can hardly pull the skin off a rice pudding, the over the windscreen light bar with the badly aligned LED flood lights (AKA "flash" lights). Then there's always the bush wires, they're good for all sorts of things, particularly decapitating those inconsiderate pedestrians trying to cross in front of you in Tesco's carpark, and don't forget the oversized super knobbly monster truck tyres that ruin the (already crap) turning circle, you'll know that you got that right when it takes at least 15 tries to do a "three point turn". And not forgetting the HID headlight conversion, you can have loads of fun dazzling other drivers with that. Regarding the 2" lift, why not go the whole hog and increase it to a full 4", now that will really screw up the handling as well as making a real mess of the prop shafts?
 
brian47 said:
As 300bph has said numerous times in the past, it depends on what you want to do with the vehicle.

It often makes me wonder why someone would buy a perfectly capable vehicle and then they start "modding" things with such items as lift kits with little or no knowledge of or regard to the consequences which can screw up both the on and off road handling. Then they go fitting huge knobbly tyres and wonder why the already crap turning circle is even worse and the whole thing handles so badly that it's a death-trap at anything over 10 mph on a flat surface, although in this case, the OP did order the wrong tyres and while he should have coughed up and made arrangements to replace them with the right ones, he's decided to modify the vehicle to fit the tyres instead.

Sensible mods are rarely noticed, such as extended breathers, underbody protection, etc.

"Tongue in cheek" .......
Poseur mods are the ones which most often seen but generally don't do much for the operation of the vehicle in adverse conditions, here you can include such useful items as the Tesco carpark snorkel, the pretty little winch with built in pressure washer that can hardly pull the skin off a rice pudding, the over the windscreen light bar with the badly aligned LED flood lights (AKA "flash" lights). Then there's always the bush wires, they're good for all sorts of things, particularly decapitating those inconsiderate pedestrians trying to cross in front of you in Tesco's carpark, and don't forget the oversized super knobbly monster truck tyres that ruin the (already crap) turning circle, you'll know that you got that right when it takes at least 15 tries to do a "three point turn". And not forgetting the HID headlight conversion, you can have loads of fun dazzling other drivers with that. Regarding the 2" lift, why not go the whole hog and increase it to a full 4", now that will really screw up the handling as well as making a real mess of the prop shafts?
Click to expand...
he has been watching to many Yank shows where lifted vehicle are cool until this happens.
lifted-trucks-blog-1-18-12-pic1.jpg
 
300bhp/ton said:
Probably no on both counts...
Click to expand...
Oh dear.

Non-standard tyre sizes = modification = must be declared to insurers. Potential risks can include, vehicle seizure for no insurance, trying to get fresh insurance with a modified vehicle and IN10 on a licence is rather pricey never mind the fine and retrieval costs. Potential prosecution for fraud. It can also include non-payment of anything beyond third-party losses in the event of a claim being made. Given that a lift kit has been mentioned, that too must be declared once fitted.

Taller tyres = potentially under-reading speedo = offence under S19.2 Construction & Use regs 1986. Assuming this is 265/75r16 ordered to replace 235/70r16 (the latter being a standard disco/RRC size) the speedo will underread in the region of 9.3%. Old cable driven speedos used to be reasonably innacurate, newer electronic ones are generally well under 10% error in my experience.

So, hard, but uncomfortable facts, or a "probably no", you decide.

Brian has it pretty much spot on too as regards mods. I will add this though. If you are new to the game, stick to stock. It will make you a better driver in the rough, actually having to pick lines, think of routes, plan approaches, rather than relying on things that can just get you stuck deeper, and thus harder to pull out. I have taken 2wd saloon cars where tricked up defenders have gotten stuck, moved a few inches to one side and sailed right past the obstacle. Taller tyres=deeper ruts=yet more complaints about 4x4s churning up the countryside=more lanes restricted and closed.

Signed someone who deals with traffic law and road safety every time I go to work or pick up the work phone.
 
Ill chuck something in the pot!
When people started talking about fitting Winter tyres a few years ago, there were issues with some insurance companies because some drivers insisted on telling them that they had fitted Winter tyres which confused the insurance box tickers.

It was resolved when the Insurance Cos got their heads around it and (most) agreed that Winter tyres were not a "modification" and needed no notification.

All manufactures list the range of approved tyres that can be fitted, if you fit ones from their list no probs.

If you fit "non-standard" tyres I can see how you could have issues with insurance validity but it would really only be an issue if the tyres could be traced to the cause of a claim.

But its def a good idea to tell them about what mods you have made, incl tyres, the reason is that if someone pinches your P&J the insurance Co can say your mods made it more attractive to thieves and refuse to pay, this has happened to people.

As for speedo readings, my mates has 255/60 R18, and its speedo is dead on, no room for error, but it certainly doesn't under read, checked against radars, GPS, other cars and distance/time.
 
Wasn't posting to cause an argument, I let the OP know my experience with the question he asked. Who says I haven't told my insurer? With regards to my speedo its now more accurate than it previously was with original sized tyres.
 
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