FORUM CLASSIFIEDS DIFFLOCK.com Links & Networks
Forum Homepage
Log in
Profile
Search
Private Messages
Forum Members
Register
Classified Ads
Search Ads
Place New Ad
My ads
Place your classified
ads here for FREE
NB: Adverts placed in the general
forum areas will be deleted
Difflock Homepage
Online Shop
Contact Us
FAQ
Calendar
Garage
Facebook
Twitter
Youtube
Advertise With Us - Reach your target market by advertising on the Difflock.com forum.
Click here or call 0845 125 9407


Tyre and wheel newbie advice for Vitara

 
 
Post new topic   Reply to topic    Difflock Forum Index -> Wheels and Tyres
View previous topic :: View next topic  
Author Message
Undiplomatic
Just got MTs


Joined: 10 May 2010
Odometer: 483




PostPosted: Sun Nov 16, 2014 12:47 pm    Post subject: Tyre and wheel newbie advice for Vitara Reply with quote

I don't know much about tyres or wheels and trying to make the right decisions. I've always just been given suitable wheels and tyres for my car and never had to hunt my own! I'm also trying to keep my car engineerically correct as much as possible for a modified car so I want to know about offset and matching the tyres up to the rims.

Here's what I know.

I am currently running Runway Enduro AT tyres size LT235/75 R15 (equates to roughly 29"). I'd like to stick to this diameter tyre because it's big enough for off road use, yet not so big as to excessively slow down the car on the road or require gear ratio mods. I did try 31" wheels, great off road but didn't like them on road, too slow. Also, I removed the spring on my Vitara to check if these 29" tyres fully clear the wheel arches and they do, only just, with the wishbone pushed up against the bumpstops.

I'd like to move to a tyre that's more capable off road but ok on road. I like the look of the Goodrich KM2 below because it's ok on road (noise, fuel efficiency, according to my friend who uses it on his Cherokee), but still has some pokey-outey bits at the sides to get through mud. My car gets some farm use twice a year, occasional off road tours abroad, and also getting social use around London, but not high miles.

How do I match up a tyre size and a rim? And what tyre width to go for? I may buy new rims so I am not restricted to a tyre size that fits my existing rims, I can go for any combo.

And what about the wheel backspace or ET? I have a Calmini 3" suspension kit fitted, and Calmini have an advisory issued which says that for the correct leverage on their suspension springs, to give the correct ride height, and for correct componant life I should be running 30" x 9.5" tyres with 2" - 2.5" wheel backspace. But, get this, the Calmini website gives different recommendations! Links below. The website also recommends 30" x 9.5" tyres, but suggests 3" to 3.25" backspace. The website also recommends a rim size of 15" x 7-8", which the advisory gives no comment on. With backspace do I need to worry about keeping centre-point steering? Or is that too much over thinking? Maybe should just contact Calmini to see which of their backspace recommendations to follow and stick to that?

My current wheels are from a Daihatsu Fourtrak but can't find their offset online. Anyone know what it is?

Calmini backspace advisory: https://www.calmini.com/docs/bulletin-suzuki-whe...ce-disclaimer.pdf
Calmini tyre recommendations: https://www.calmini.com/tire-size.php

Back to top
View user's profile Send private message
Mr Tyre
Mud Obsessed


Joined: 17 Jun 2002
Odometer: 4889
Location: Darlington Co Durham



PostPosted: Sun Nov 16, 2014 4:00 pm    Post subject: Reply with quote

Sounds like you need to ask Calmini, what advice is right before you buy something you don't really need.
30.9.50R15 tyres (dependent on makes they all vary a bit.New ones come out at around 29.5 inches in diameter, 235/75's are around 29 inches as you say so there isn't that much between the 2 tyre diameters..You should tell Calmini what rims you already have, i 'm guessing it's the chrome ones from the fourtrak tdx.
Back to top
View user's profile Send private message
Undiplomatic
Just got MTs


Joined: 10 May 2010
Odometer: 483




PostPosted: Sun Nov 16, 2014 4:16 pm    Post subject: Reply with quote

It's the chrome Fourtrak wheels. Yes I agree that I should just go with what Calmini recommend. I also just spoke to someone that messed around with offset and says it doesn't make that much difference to the feel of the car and not worth worrying about. So maybe just stick to the Fourtrak wheels and fit the KM2 tyres to them.

Wouldn't mind knowing the width and offset of the Fourtrak wheels though so that I can see how close I am to Calmini's recommendations.

Will telephone Calmini USA tomorrow.
Back to top
View user's profile Send private message
Mr Tyre
Mud Obsessed


Joined: 17 Jun 2002
Odometer: 4889
Location: Darlington Co Durham



PostPosted: Sun Nov 16, 2014 4:35 pm    Post subject: Reply with quote

http://youtu.be/tYEWoG83Vsg

You can measure back spacing yourself have a look at the above link.
I expect you wheels to be close to 0mm offset.
Back to top
View user's profile Send private message
Undiplomatic
Just got MTs


Joined: 10 May 2010
Odometer: 483




PostPosted: Sun Nov 16, 2014 6:45 pm    Post subject: Reply with quote

I know I can measure it, just was hoping someone knew already as these are popular wheels and save me taking it off the car Smile How do I measure the width, is it literally the distance from lip to lip?
Back to top
View user's profile Send private message
Mr Tyre
Mud Obsessed


Joined: 17 Jun 2002
Odometer: 4889
Location: Darlington Co Durham



PostPosted: Sun Nov 16, 2014 6:53 pm    Post subject: Reply with quote

The chrome TDX rims only came in one width and that was 7 inch.


To give you some idea most 7 inch wide rims with 0 offset have 4 inches of back spacing
Back to top
View user's profile Send private message
Undiplomatic
Just got MTs


Joined: 10 May 2010
Odometer: 483




PostPosted: Sun Nov 16, 2014 7:08 pm    Post subject: Reply with quote

Thanks Mr Tyre!
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Difflock Forum Index -> Wheels and Tyres All times are GMT - 12 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot post calendar events in this forum
Adrian Flux 2017

Specialist Tools

Evo Oils

Service Kits

Facebook

Join our mailing list for upcoming events, special offers, discount coupons and expert advice on the latest 4x4 products!

* indicates required





    
Powered by phpBB © phpBB Group