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Rim Offset
Posted: Wed Mar 11, 2020 1:57 pm
by BenH
Hi All
Does any one know what the standard offset is for a standard rim is in millimeters?
I am looking at some after market rims that are 13x7 but the offset is 90mm.
Will these conflict with with suspension spring or conflict with anything else?
Re: Rim Offset
Posted: Thu Mar 12, 2020 10:05 am
by heinkeljb
I will try to measure one of my rims today when I get back from work.
John
Re: Rim Offset
Posted: Thu Mar 12, 2020 10:28 am
by BenH
Thanks John
Would be even happy if someone could take a picture underneath their Haffie so I can work out possible clearance to spring
Re: Rim Offset
Posted: Thu Mar 12, 2020 11:56 am
by robw
Pretty sure that the standard offset is around 33mm - after significant research a few years ago i ended up with a 4.5 x 13 with a 33mm offset and i was trying to get as close as possible to original except with a 13" rim
Re: Rim Offset
Posted: Thu Mar 12, 2020 12:10 pm
by robw
pics for you with 4.5 x 13's and 33mm offset
Re: Rim Offset
Posted: Thu Mar 12, 2020 1:27 pm
by BenH
Thanks Rob
Pictures appear to still have a fair bit of clearance to spring.
When you measure 33mm is that rim mounting face to outer edge of rim on brake hub side.
Just want to confirm we are talking the same thing.
Would have thought brake hub would be wider than 33mm so not sure if I am confusing myself.
Re: Rim Offset
Posted: Fri Mar 13, 2020 2:17 am
by AustHaflinger
I dont know anything about offsets - I deal in absolute numbers.
The distance between the inside of the standard Haflinger 12" rim (where it bolts to the hub) to the outer edge of the inner rim is 100mm with the tyre adding about another 5mm - clears everything.
I have 6" 14" rims fitted and from the inner face (where it bolts to the hub) to the outer inside edge of the rim is 110mm with about 8mm extra for the 185 wide tyre. Again I easily clear everything.
So if the distance between the inner face of the 13" rim to its inner edge is less than about 110-115mm I am sure you will have no issue.
Garry
Re: Rim Offset
Posted: Fri Mar 13, 2020 6:43 am
by BenH
Thanks Garry
That all makes sense
Looks like the rims that I am looking at should fit with no problems
Re: Rim Offset
Posted: Fri Mar 13, 2020 11:12 am
by robw
This explanation from the guys that i sourced my wheels from
Offset is stamped on a wheel as an ET value, which refers to the German phrase Einpress Tiefe. ET indicates the distance between the mounting surface and the geometric centre of the wheel (the symmetry axle), usually expressed in millimetres.
Seems clear enough but maths needed
