How much offset??

After much debate have decided on 31/11.5 Kuhmo MTs for my Disco1 on 15" rims. Before I buy the wrong wheels and end up in need of spacers, any ideas what offset I should be looking for to prevent rubbing of inside wall of the tyre? I'm obviously prepared for trimming and fitting extended arches. Am guessing it will need to be more than +30mm as this is the offset of my 0E (300tdi ES) 16"s

Can nobody help?

I run 31 x 10.5 R15 BFG AT's on 8J rims ... iof that haelps. No rubbing or fouling at all on chassis/trailing/radius/whatever arms etc etc Bodywork's a different matter .. but that's only minor and at full articulation ...

Why not ask the place you're gettin the wheels from surely they know what's required.

Paul D said:

I run 31 x 10.5 R15 BFG AT's on 8J rims ... iof that haelps. No rubbing or fouling at all on chassis/trailing/radius/whatever arms etc etc Bodywork's a different matter .. but that's only minor and at full articulation ...

Click to expand...

Thanks Paul, do you know if the rims have an offset?

hughesy said:

Why not ask the place you're gettin the wheels from surely they know what's required.

Click to expand...

That was first place I asked but they only have 15x8s with zero offset that fit landrover so that's what he is trying to sell. Cant get any info from them as to whether they will cause issues and as I said I don't want to end up needing spacers

Sorry I don't.

I bought them from Paddocks last year, £25 each .. they're not standard modulars though, they look slightly different and do look like they have a different offset to the Alloys I took off, but I wouldn't like to say how much as it's guesswork ..

If you can bear with me till a bit later I've got four different wheels here, standard landy steel, disco steel, a set of white eightspokes and the set I'm using which are modulars with 265's on. I'll try and measure the offset on each of em maybe that'll give you an idea.

There should be some marks stamped on the back of rims, such as 8j ET35 .. I believe the number is the offset in mm, but that might change between manufacturers!

https://www.rsracing.com/tech-wheel.html

Seems to know what they're on about ...

hughesy said:

If you can bear with me till a bit later I've got four different wheels here, standard landy steel, disco steel, a set of white eightspokes and the set I'm using which are modulars with 265's on. I'll try and measure the offset on each of em maybe that'll give you an idea.

Click to expand...

Hughesy that would be very useful if you can!

Paul D said:

There should be some marks stamped on the back of rims, such as 8j ET35 .. I believe the number is the offset in mm, but that might change between manufacturers!

https://www.rsracing.com/tech-wheel.html

Seems to know what they're on about ...

Click to expand...

Indeedy, my 16" stock ES wheels are a 33 offset which is stamped on the outside

Right I dunno if this will be any help.Couldn't find any numbers on any of em but they're mostly covered in rust/dirt/several layers of paint and I didn't look too hard. The following measurements are the back of the wheel to the inside rim which is the bit that affects steering lock. The standard defender steels and the disco steels 140mm, the modulars125mm and the 8 spokes 105mm. So the std wheels have the least offset and the 8 spokes the most. The modulars in question have been used on my 110 and several discos fitted with bfg 265/75r16 muds and they've never fouled on anything apart from disco bodywork which we all know needs doctoring to fit bigger tyres.

Hi Hughsey, thanks for taking the time to do those measurements - very much appreciated

I am a bit confused as to where exactly you measured, was it from the inside face of the wheel (I.e where the wheel mates with the hub) to the inside of where the rim starts? If so would the largest number not be the wheel with biggest offset due to it being furthest away from the hub/ stick furthest out of the wheel arches?

gR@HaM said:

Hi Hughsey, thanks for taking the time to do those measurements - very much appreciated

I am a bit confused as to where exactly you measured, was it from the inside face of the wheel (I.e where the wheel mates with the hub) to the inside of where the rim starts? If so would the largest number not be the wheel with biggest offset due to it being furthest away from the hub/ stick furthest out of the wheel arches?

Click to expand...

Measured fron the inside face of the wheel to the inside edge of the wheel rim. That's the inside facing rim of the wheel ie the side that would catch on anything. Therefore the largest measurement is the greatest inward amount and the smallest measurement has the most offset.