Question about wheel offset vs. wheel width
#1
Addict
Rennlist Member
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Example:
Wheel 1: 18X10 with offset 54mm
Wheel 2: 19x11 with offset 56mm
Questions:
Is the additional width of Wheel 2 all on the inboard side of the wheel?
If yes, it stands to reason that Wheel 2 would sit 2mm more inboard than Wheel 1 and one should be more concerned with inboard clearance issues with the wider wheel?
Or,
Is the 1" additional width of Wheel 2 split .5" (12.7mm) outboard and .5" (12.7mm) inboard which would mean Wheel 2 sits 10.7mm (12.7mm - 2mm) more outboard than Wheel 1?
I thought I understood offset better than I apparently do and one needs to consider wheel width as it relates to offset. So confusing!
Thoughts?
Wheel 1: 18X10 with offset 54mm
Wheel 2: 19x11 with offset 56mm
Questions:
Is the additional width of Wheel 2 all on the inboard side of the wheel?
If yes, it stands to reason that Wheel 2 would sit 2mm more inboard than Wheel 1 and one should be more concerned with inboard clearance issues with the wider wheel?
Or,
Is the 1" additional width of Wheel 2 split .5" (12.7mm) outboard and .5" (12.7mm) inboard which would mean Wheel 2 sits 10.7mm (12.7mm - 2mm) more outboard than Wheel 1?
I thought I understood offset better than I apparently do and one needs to consider wheel width as it relates to offset. So confusing!
Thoughts?
#3
Addict
Rennlist Member
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
So then based on my example above, to use a 19x11 wheel and have it sit exactly where the 18x10 wheel (54mm offset) sits without messing with spacers or changing out wheel studs, the offset on the 19x11 wheel would have to have an offset of 54mm + 12.7mm or 67mm? OR, find a 19x10 wheel with a 54mm offset?
#4
Racer
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
So then based on my example above, to use a 19x11 wheel and have it sit exactly where the 18x10 wheel (54mm offset) sits without messing with spacers or changing out wheel studs, the offset on the 19x11 wheel would have to have an offset of 54mm + 12.7 or 67mm? OR, find a 19x10 wheel with a 54mm offset?
The case is very simple. As both wheels are mounted at the same place, the second is 1' larger than the fisrt. So, if the offset have been the same, second wheel will take more place than first with 1/2' outside and 1/2' inside. In mm that's mean 12.7mm outside. As the offset is 56mm in the second instead of 54 mm for the first, then second will be 10.7mm outer and 14.7mm inner.
Am I clear?
Puyi
#6
Addict
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
So then based on my example above, to use a 19x11 wheel and have it sit exactly where the 18x10 wheel (54mm offset) sits without messing with spacers or changing out wheel studs, the offset on the 19x11 wheel would have to have an offset of 54mm + 12.7mm or 67mm? OR, find a 19x10 wheel with a 54mm offset?
Trending Topics
#8
Advanced
Join Date: Feb 2009
Location: Stockholm, Sweden
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Heres something I put together on a sickday this winter. Although it will calc clearance relative to tires.
http://medlem.spray.se/pt2pt/wheels.html
http://medlem.spray.se/pt2pt/wheels.html
#11
Addict
Rennlist Member
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I am looking for a 1 pc. wheel and it's going to be difficult to find it a 19x11 in a 67mm offset.... Not many 19x10 wheels out there from what I've seen so far. I would consider a multi-pc wheel if I could find a style I like and don't really like anything from the usual suspects.
#12
Rennlist Member
#13
Former Vendor
#14
Addict
Rennlist Member
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Damon, your link goes to a long list of topics, do you guys have something like Jarrod posted?
#15
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
What year/type of 928 r they going on?
some links for 19" rims
http://www.championmotorsport.com/996RG5B.htm
http://www.wheeldynamics.net/appguide.html
I think my rears are 19x11.5 w/a 62 offset and fronts are 8.5/19 w/a 53 offset... they were for a 997?
some links for 19" rims
http://www.championmotorsport.com/996RG5B.htm
http://www.wheeldynamics.net/appguide.html
I think my rears are 19x11.5 w/a 62 offset and fronts are 8.5/19 w/a 53 offset... they were for a 997?