Will 265/75/16 tyres fit 8" Rims?

I think the big problem could be turning circle. You may have to set the steering stops to clear the tie rods and springs and not have a lot of lock left. Can you try some? Those ones in the pic do look like there's a lot off offset on those wheels as they don't stick out.

I'm not sure about the offset of my 8j rims, They currently have 245/70/16's on them, if they fit under ok are the 265's a similar width?

Ok looked at the chart posted earlier I guess they are likely to be 20mm wider compared to 245's.

Rodeo Joe said:

I'm not sure about the offset of my 8j rims, They currently have 245/70/16's on them, if they fit under ok are the 265's a similar width?

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A 265 is 20mm wider than a 245 by the book. However a bigger sidewall (75% of 265 vs 70% of 245) will make them appear quite a bit bigger.

There is a 2"+ difference in diameter. However they should give you an idea. If they fit with lots of clearance, then you will likely be fine. If they are fairly close, then......

BTW not all tyres are equal and some will come up bigger or smaller than the stamped numbers. Especially MT's and remoulds.

I can see a weekend full of wheelbraces and sweat ahead of me.

tbh, while it is illegal if they stick out, it isn't part of the MoT test, so won't fail because of, although technically you could be pulled for it. But chances are remote if it's only slightly, you could just chance it and see and not worry too much. Although if they do stick out, it'll chuck mud and dirt up all over the sides of the vehicle a lot more.

I had 235/85s on defender lwb rims on my military 109 2a and the fronts would catch the arch off-road, even the rears occasionally just caught on road when loaded up....scared the carp outta me!

I suspect you'd need an odd offset to keep 265s inside the arches and arms like Popeye to manhandle the steering on a Series.

Yes the steering force can get a bit much with wider tyres. OK if the power steering is doing the work but a bit hard if you are parking a Series. My 235/85s haven't hit the arches so far but I do 99% on road. Having had it happen on other vehicles I can confirm it makes one hell of a noise!

Before my brain melts are 235/85/16s the same width on the rim as 235/70/16s?

Yes... it’s the height that’s is different. Basically 85% or 70% of the width.

Great now I know 235/85/16s will fit on the 109 with the rims I have got and not interfere with the bodywork.
I was told they were 8" rims when I got them but on closer inspection it turns out they are 7" so alls good.

Maggsie8 said:

Yes... it’s the height that’s is different. Basically 85% or 70% of the width.

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The sidewall will impact how they fit the rims.

By chance I was parked up next to an early Defender / 110 with the same wheels as i have, the tubed LWB wheels. They had 750R/16 and I run 235/85/16. The tyres looked nearly identical, the outside dia was withing 1/4 - 1/2" and I think the 235s were about 1/2" wider across the widest part (1/4" either side). The tread on the 235s was slightly wider. Meant to take a photo as it was very intersting to see a direct comparison and both on tubed rims.

7.50’s are a bit odd these days. Many are just re-branded 235’s and aren’t really a 7.50, despite being marked up as such.

A 7.50 should be a noticeable amount narrower. Heights should be similar. But again vary a lot in practice. 7.50 partners measure about 29” tall, while a black star diamond is around 32” tall.

Mine are 235/86BFG All Terrain but I forgot to read what the Defender / 110 ones were. Agree they seem to vary a lot. Just noticed that Avon Rangemasters are being sold as "7.50R - 16" and "7.50R/80 - 16" which could be 3" different on dia (29 vs 32?)

rob1miles said:

Mine are 235/86BFG All Terrain but I forgot to read what the Defender / 110 ones were. Agree they seem to vary a lot. Just noticed that Avon Rangemasters are being sold as "7.50R - 16" and "7.50R/80 - 16" which could be 3" different on dia (29 vs 32?)

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I bought a set of rangemasters last year advertised as the 7.50/80 R16 , but advice on here was it was more to do with the IT set ups of the tyre website , when they came in they were 750 x R16 , so I think they will be one And the same tyre . Well happy with them too I think they’re 31/32” dia

steve2286w said:

I bought a set of rangemasters last year advertised as the 7.50/80 R16 , but advice on here was it was more to do with the IT set ups of the tyre website , when they came in they were 750 x R16 , so I think they will be one And the same tyre . Well happy with them too I think they’re 31/32” dia

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I believe this is the more likely scenario. Most tyre websites are setup for the current standard tyre sizes (which are an odd hybrid of imperial and metric!!!)

width in mm/profile in %/construction type (R for radial) and then rim size in inches

i.e.

235/85R16

235 mm wide
Profile is 85% of the width
R for radial
16" rim

With off road tyres a lot of older sizes are still common, such as:

31.10.50R15

Which means:
Height.Width.Construction.Rim

And in old money specs like: 7.60 x 16 or 7.50 x R16

Neither of the older tyre sizes state profile. They use height instead or not at all. Which is an issue for a lot of computer systems. So they input false figures to allow the system to work.

Ha, I remember that thread now, and I agree. But it is annoying.

Type your tyre size options into here to compare the differences in height / width etc. , I found this very useful when I was swapping from 19" to 16" . It will give you a side by side comparison or an overlay comparison and it also gives your speedometer differences.

https://www.tacomaworld.com/tirecalc?tires=255-55r18-235-85r16