Largest tires that will fit after installation of Johnson Rods - Land Rover Forums : Land Rover and Range Rover Forum
 5Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 63 (permalink) Old 09-25-2017, 08:45 PM Thread Starter
Member
 
ar077's Avatar
 
Join Date: May 2017
Location: Las Vegas NV
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Largest tires that will fit after installation of Johnson Rods

I plan to have Johnson Rods installed, which will raise my Disco by 1.5". Would LT285/55R20 tires fit or would I have to settle for 275/55R20s? Also, would installing LT (Load Range E) tires, which are heavier and harder riding (but would be more robust for off-road use) have any adverse effects on the vehicle?

2017 Discovery HSE Td6, 5-Seat, Capability Package
2006 GMC Sierra 2500HD 6.6L Duramax Diesel 4x4
ar077 is offline  
Sponsored Links
Advertisement
 
post #2 of 63 (permalink) Old 09-26-2017, 05:01 AM
Stefan Smith
 
Stef.an's Avatar
 
Join Date: Feb 2017
Location: Dubai, United Arab Emirates
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
There will be no issue if you use LT285/55R20 since it will fit your Discovery. For sure, it will look good. The problem you'll face is the rock chips on the side of your disco because of your wider rim.

Conquer every road with what you have
Stef.an is offline  
post #3 of 63 (permalink) Old 09-27-2017, 04:40 AM
VW Dieselgate beneficiary
 
DieselRanger's Avatar
 
Join Date: Feb 2017
Location: Colorado Springs
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
I would be careful. The 275/55-20s leave maybe an inch of clearance at off-road height when turned to lock. 285/55-20s may take that space up. Just because you're lifting it doesn't mean your wheel well is getting larger, you're just reducing the amount of overlap between two circles.

I would measure the clearance on the inside of the wheel well with the OEM 255/55-20 at lock, and then do the math against the larger diameter of the 285/55-20. Your tire will be 1.2" wider and 1.3" taller.
Attached Thumbnails
Click image for larger version

Name:	JPEG_20170927_064054.jpg
Views:	326
Size:	163.2 KB
ID:	80049  
Stef.an likes this.

Yes, I do take it off-road.
----------------------------
2017 Discovery HSE Td6
DieselRanger is offline  
 
post #4 of 63 (permalink) Old 09-27-2017, 05:23 AM
member
 
SafariDave's Avatar
 
Join Date: Feb 2008
Location: Brooklyn, NY
Posts: 1,745
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 133 Post(s)
go always taller than wider.
Dave

The City is a Jungle.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Present Land Rovers
1999 LR Disco II SD7 White 150K miles 'The Beach Boy' (PR truck)
2005 LR3/ D3 SE 4.4 Bonatti 'Fancy Professor' (my girl's LA LR3)
2005 LR3/ D3 SE 4.4 Bonatti 'The Rhino'
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(my NYC LR3)
De-tangoed Headlights, LR4 Style Grille, Dueler Alenza HL 255/55/19

Past Land Rovers
1999 LR Disco II SD Niagara Grey 'Old Rhino' 200K+ miles (Sold)
1991 Range Rover Classic Green 'The Turtle' 200K+ miles (Sold)
1988 Range Rover Classic White 'The Rust Bucket' (Sold)
SafariDave is offline  
post #5 of 63 (permalink) Old 10-15-2017, 08:52 PM Thread Starter
Member
 
ar077's Avatar
 
Join Date: May 2017
Location: Las Vegas NV
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Thanks to all for the sound advice! Land Rover Las Vegas offers the Discovery configured with Johnson Rods and equipped with 285/50-20 tires, which have the same section width as 285/55-20s. I agree with SafariDave that taller is better than wider and will opt for 275/55-20s over 285-50/20s if clearance would be a problem with 285/55-20s. And, considering Stef.an's observation regarding rock chips, I'll have the Land Rover mud flaps installed at the same time.

2017 Discovery HSE Td6, 5-Seat, Capability Package
2006 GMC Sierra 2500HD 6.6L Duramax Diesel 4x4
ar077 is offline  
post #6 of 63 (permalink) Old 12-07-2017, 11:07 PM
Member
 
Join Date: Nov 2017
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Quote:
Originally Posted by ar077 View Post
Thanks to all for the sound advice! Land Rover Las Vegas offers the Discovery configured with Johnson Rods and equipped with 285/50-20 tires, which have the same section width as 285/55-20s. I agree with SafariDave that taller is better than wider and will opt for 275/55-20s over 285-50/20s if clearance would be a problem with 285/55-20s. And, considering Stef.an's observation regarding rock chips, I'll have the Land Rover mud flaps installed at the same time.


Hi ar077, in the end what was your final decision?
Aviator is offline  
post #7 of 63 (permalink) Old 12-08-2017, 10:24 PM
Stefan Smith
 
Stef.an's Avatar
 
Join Date: Feb 2017
Location: Dubai, United Arab Emirates
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by DieselRanger View Post
I would be careful. The 275/55-20s leave maybe an inch of clearance at off-road height when turned to lock. 285/55-20s may take that space up. Just because you're lifting it doesn't mean your wheel well is getting larger, you're just reducing the amount of overlap between two circles.

I would measure the clearance on the inside of the wheel well with the OEM 255/55-20 at lock, and then do the math against the larger diameter of the 285/55-20. Your tire will be 1.2" wider and 1.3" taller.
Well, you have a great point here. I think you're right. It would be better to check the effect that it will do. Anyway, thanks for your advice

Conquer every road with what you have
Stef.an is offline  
post #8 of 63 (permalink) Old 12-20-2017, 08:10 PM Thread Starter
Member
 
ar077's Avatar
 
Join Date: May 2017
Location: Las Vegas NV
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Quote:
Originally Posted by Aviator View Post
Hi ar077, in the end what was your final decision?
When the time comes (i.e., when the excellent stock tires have enough wear on them that I can justify [or at least rationalize] replacing them) I'll have Johnson Rods installed along with 285/50R20 Nitto Terra Grappler G2s. Saw a New Disco so-equipped in the dealership today (all black with black interior and black wheels). Looks absolutely spectacular!
ar077 is offline  
post #9 of 63 (permalink) Old 12-20-2017, 10:33 PM
Senior Member
 
p76rangie's Avatar
 
Join Date: Jan 2006
Location: Melbourne Australia
Posts: 5,659
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 385 Post(s)
Quote:
Originally Posted by ar077 View Post
When the time comes (i.e., when the excellent stock tires have enough wear on them that I can justify [or at least rationalize] replacing them) I'll have Johnson Rods installed along with 285/50R20 Nitto Terra Grappler G2s. Saw a New Disco so-equipped in the dealership today (all black with black interior and black wheels). Looks absolutely spectacular!
It would be nice to live in a country that allows you to do just about anything to a vehicle.
The United Nations Vehicle Regulations sets very high testing standards for any vehicle fitted with Electronic Stability Control (ESC) like the Disco 5. Therefore, we are not allow to make any modification to a vehicle that may affect the handling and therefore affect the ESC system. So we cannot fit different tyres to standard unless the tyre manufacturer is prepared to specify that the tyre will have no affect on the ESC system of the vehicle you are fitting them to. Of course no tyre manufacturer is prepared to make such a statement.
p76rangie is offline  
post #10 of 63 (permalink) Old 12-21-2017, 06:33 PM Thread Starter
Member
 
ar077's Avatar
 
Join Date: May 2017
Location: Las Vegas NV
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Quote:
Originally Posted by p76rangie View Post
It would be nice to live in a country that allows you to do just about anything to a vehicle.
The United Nations Vehicle Regulations sets very high testing standards for any vehicle fitted with Electronic Stability Control (ESC) like the Disco 5. Therefore, we are not allow to make any modification to a vehicle that may affect the handling and therefore affect the ESC system. So we cannot fit different tyres to standard unless the tyre manufacturer is prepared to specify that the tyre will have no affect on the ESC system of the vehicle you are fitting them to. Of course no tyre manufacturer is prepared to make such a statement.
Bugga! Would you not even be permitted to install off-road suitable tyres of the same size as the stock tyres? Such a rule here would have been a deal breaker for me. I'm so glad to be in a country that isn't under the thumb of the East River Debating Society.
ar077 is offline  
post #11 of 63 (permalink) Old 12-21-2017, 06:43 PM
Senior Member
 
p76rangie's Avatar
 
Join Date: Jan 2006
Location: Melbourne Australia
Posts: 5,659
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 385 Post(s)
Quote:
Originally Posted by ar077 View Post
Bugga! Would you not even be permitted to install off-road suitable tyres of the same size as the stock tyres? Such a rule here would have been a deal breaker for me. I'm so glad to be in a country that isn't under the thumb of the East River Debating Society.
As with the US, cars have to conform to certain standards in order to be sold in the country. The difference is that we have to maintain the compliance throughout the life of the vehicle. We are allowed a number of modifications without certification, others require a engineer to approve. For example we can do a 2 inch lift, 2 inch bigger tyres, bullbar, winches, etc, to non-ESC vehicles without certification, but to go larger than these require a engineer to certify the car as remaining compliant.
It is just with ESC there are many tests that a vehicle manufacturer must complete to get the car certified in the first place, so it is difficult to say what modifications would affect certification. So they simply do a catch all statement that states that you cannot do any modification to an ESC vehicle that may affect the ESC system without a certificate from the manufacturer of the part or vehicle stating that it will not interfere with it.
So the simply answer is that you do not get a ESC vehicle if you want to modify it for off-road.
p76rangie is offline  
post #12 of 63 (permalink) Old 01-12-2018, 03:23 PM
Site Sponsor
 
Johnsonrods's Avatar
 
Join Date: Apr 2017
Posts: 103
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Discovery 5 lift kit

You can fit a 285-50-20 as below in the first picture or a 275-55-20 which is about 32 inches as shown in the second picture.
Many of the Land Rover dealers are using Johnson Rods with the 275-55-20 mud tire. They seem to sell faster with the lift.

[IMG][/IMG]
[IMG][/IMG]

Check our website for more info:
Discovery 5 lift Kit
Johnsonrods is offline  
post #13 of 63 (permalink) Old 01-12-2018, 04:02 PM
Site Sponsor
 
Johnsonrods's Avatar
 
Join Date: Apr 2017
Posts: 103
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Discovery 5 Specs VS LR4

Here are the specs for the Discovery 5.
The ground clearance, approach and departure angle are better than the LR4.
Add a 1.5 inch Johnson Rod lift and it gets better, plus 275-55-20 MT tires and you are trail ready.

Discovery 5 lift Kit

[IMG][/IMG]
Johnsonrods is offline  
post #14 of 63 (permalink) Old 02-04-2018, 12:50 PM
Site Sponsor
 
Johnsonrods's Avatar
 
Join Date: Apr 2017
Posts: 103
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Discovery 5 lift kit with Johnson Rod 1.5 lift 275-55-20

Here is another Discovery 5 with a 1.5 inch Johnson Rod lift and 275-55-50 mud terrain tires. Dealer showroom!
Discovery 5 lift Kit

[IMG][/IMG]
Johnsonrods is offline  
post #15 of 63 (permalink) Old 02-04-2018, 08:34 PM Thread Starter
Member
 
ar077's Avatar
 
Join Date: May 2017
Location: Las Vegas NV
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Thanks for the photos! Judging from the ample clearance around 285/50-20s or 275/55-20s with Johnson Rods, I'm leaning toward installing LT285/55-20 Nitto Terra Grappler G2s.

2017 Discovery HSE Td6, 5-Seat, Capability Package
2006 GMC Sierra 2500HD 6.6L Duramax Diesel 4x4
ar077 is offline  
Sponsored Links
Advertisement
 
Reply

  Land Rover Forums : Land Rover and Range Rover Forum > Land Rover Model Forums > Land Rover Discovery 5 forum

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Land Rover Forums : Land Rover and Range Rover Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Welcome Johnson Rods LLC! Administrator Johnson Rods LLC 0 06-05-2017 08:17 AM
Johnson Rods & 275/65-18's questions RoverAsh Discovery 3 / LR3 11 06-23-2014 06:23 AM
Johnson Rods 2.5" Lift wrxracer87 Discovery 3 / LR3 8 10-10-2011 06:24 PM
largest tires you can use with an EAS system? deadboy1977 Range Rover Classic 3 08-12-2008 07:50 PM
largest tires for discoII greekdisco Wheels and Tires 9 11-10-2006 05:37 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome