Thread: Differences on gearing between 235/85 and 255/85

What few things did you need to tweak?
What rims size do you need to run the 255s?

Cheers guys

I got the 235's fitted. they suited my needs a bit better.

Originally Posted by OZ Landy

What few things did you need to tweak?
What rims size do you need to run the 255s?

Cheers guys

255/85's are legal on 6.5" rims, so 130 rims are good to go.

Tweaking generally refers to adjusting the pump fuel settings, generally in the aneroid/boost compensator, but can include an uprated intercooler, bigger exhaust, etc too.

Pump adjustment tutorial for the 300Tdi is here http://www.aulro.com/afvb/attachment...ng-20rev.2.pdf

How do the 255/85's compare to the 265/75's in terms of diameter?. The 265/75 seems to be a very common size with heaps of choice/competition. They also fit on a Disco/130 rim.

Originally Posted by 1103.9TDI

How do the 255/85's compare to the 265/75's in terms of diameter?. The 265/75 seems to be a very common size with heaps of choice/competition. They also fit on a Disco/130 rim.

265/75's aren't legal AFAIK on a 130 rim, (7" and up only) and they are roughly the same diameter as a 235/85, at least within a couple of mm when new looking at most manufacturers charts.

eg. BFG list the 265/75 MT at a static loaded radius of 371mm, 235/85= 378mm and 255/85= 389mm

Maxxis list the 265/75 Big Horn at 31.8" vs 33.3" for the 255/85 and I've verified the 255/85 size when I bought mine.

For those interested in how the tyres are.. I love them. These are my first mud tyre, so cant compare to others

Hit the mud yesturday, did a pretty easy red clay accent. Half way up, 2nd low im starting to slip back down. Then I remembered the idea with Mt's was to spin the mud out of them to keep the tread clean. So i gave it a squirt and hit boost, and they bite hard :P

On road they're nice. On smooth road at around 80 you get a mild hum, but who cares.

For the record, I got 110k out of my General Grabbers

What size and Brand did you get Aaron? pics pics

235/85 R16's Bighorns.

Pics ill upload soon. Shoot us a pm if your about to buy some, Ill tell you where I got the best service/price.