Mud-club

Vehicle & Technical => Discovery => Topic started by: smith335 on December 08, 2006, 16:38:04

Title: disco rims
Post by: smith335 on December 08, 2006, 16:38:04

i have at the moment 255/65/16 tires fitted on 8 inch rims to my td5 disco.

will 235/70/16 fit on the 8inch wide rims ?
i know its not safe to do it the other way round ie 255/65/16 on 7 inch wide rims.
well thats what the hand book says,but its nearly time for new boots for the disco so i thought i would go for some thing slimer,and there seems to be more choice in the 235/70/16 size.

looking at ATs. goodyear ,bfgoodrich,or the grabber ats. not sure whos best, and who has the best road manners,and off road abillitys.

any ideas

Title: disco rims
Post by: Guardian. on December 08, 2006, 18:44:49

ONE OF OURS HAS 265/70/16 ON STANDARD LAND ALLOYS THAT I THINK ARE ONLY 7 INCHES, AND THEY ARE FINE. SO 235 ON AN 8 INCH RIM WILL BE SOUND, THATS THE SIZE I REPLACED.

Title: disco rims
Post by: Henry Webster on December 08, 2006, 18:58:51

In terms of tyres - I have Goodyear's ATR which is excellent in the dry on road and is a pretty good general off road all rounder.

The BFGoodrich AT is I think slightly better on wet Tarmac (v. predictable), but not quite as good in the dry.  Again an excellent all rounder off road.

I don't have any experience with the General Grabber, but I would also look at the Matador Izzarda, which will be the control tyre for the British Off Road Championship next year and is well priced to boot!

H

Title: disco rims
Post by: smith335 on December 08, 2006, 23:31:55

thanks for the advice chaps.
whats the  wear rates like on the good years atrs?
i had some good year mtrs on my old defender a few years back and they were a good tire,i hope the atrs wear as well.

whats your thoughts?

Title: disco rims
Post by: smith335 on December 09, 2006, 22:23:12

henry, whats the wear rate like on the goodyear ATRs?

i think its down to BFGs or the GOODYEARS.

just want a good road mannered tire,and the ability to get in and out of fields when towing,and light green laning when takeing the gun dogs out.
and some thing that lasts a while.

thanks so far.

Title: Re: disco rims
Post by: Wolfie on December 09, 2006, 22:59:39

Quote from: "smith335"

will 235/70/16 fit on the 8inch wide rims ?

looking at ATs.

Depends on the make of tyre, for example BFG give rim width range of 6 to 7.5 inch on the specs for their AT http://www.bfgoodrichtires.com/specs/all-terrain-t-a-ko/44.html

So you will need to find out what other manufacturers specify

Regards

Wolfie

Title: disco rims
Post by: Range Rover Blues on December 10, 2006, 00:29:55

I'd say you were fine, 235 mm on an 8 inch rim, 8 inches is 203.2mm so still a little over-tyred in fact but you would notice the steerig being a little more positive.

Title: disco rims
Post by: Disco-Ron on December 10, 2006, 00:51:51

I personally think it depends on the tyres.... cos mine are currently 235 85/16 insa turbo sahara's, but the tread width only measures 205mm..... they are on 7 inch rims, if they were on 8's they would be too narrow.....

I'm in the process of deciding what tyres to get for my Disco, i'm tossing it over between 265 75/16's, or maybe even 285 75/16's.... either on 8inch modulars....!!

Ps, i do have big arches, and lots of metal cut away.....

Title: disco rims
Post by: Range Rover Blues on December 10, 2006, 00:55:36

But that's what the number means, it's the width of the tyre at the root of the tread, if it isn't something is wrong.  the second number is the aspect ratio and the third is quite obviously the rim diameter.

Title: disco rims
Post by: smith335 on December 10, 2006, 10:57:20

so because my alloys are 8 inch fitted with 255/65/16

and i wanted to go to Ats (BFGs or goodyear ATRs) and i havnt seen them in 255/65/16 only 235/70/16 , would i be better going for 7 inch rims.

like range rover blues said the steering would be more positive with the 235s ,and would i be right in thinking that there would be less rolling resistance, thus meaning slightly more mpg?

thanks for your help so far.

Title: disco rims
Post by: Henry Webster on December 10, 2006, 18:27:54

Quote from: "smith335"

henry, whats the wear rate like on the goodyear ATRs?

i think its down to BFGs or the GOODYEARS.

just want a good road mannered tire,and the ability to get in and out of fields when towing,and light green laning when takeing the gun dogs out.
and some thing that lasts a while.

thanks so far.

BFGs last very well, but I've never actually worn out a set personally.  The Goodyear's have been on my discovery for the last five years doing about 10,000 miles a year and still have quite alot of tread on them.  They're not so good off road now, but still good elsewhere.

H

Title: disco rims
Post by: Range Rover Blues on December 11, 2006, 01:16:05

Quote from: "smith335"

so because my alloys are 8 inch fitted with 255/65/16

and i wanted to go to Ats (BFGs or goodyear ATRs) and i havnt seen them in 255/65/16 only 235/70/16 , would i be better going for 7 inch rims.

like range rover blues said the steering would be more positive with the 235s ,and would i be right in thinking that there would be less rolling resistance, thus meaning slightly more mpg?

thanks for your help so far.

Sounds like you got the idea, yes.  If it were a Ford Escort you were running I would recomind not 'overtyring' ie not let the tread become wider than the rim, handling falls off significantly because the tyre can squish away sideways when cornering.  Not the first concern of a 4x4 but yes, a wider rim had distinct adantages.  The only penalty as such may (I say MAY) be when you run at very low pressures.