Help identifying alloys
Discussion
Thanks for the responses. That gave me the right information to go digging.
Just in case anyone comes back to this thread.
Yes, the both the 991 & 718 have a slightly higher rear rim width, and the offset of the rear 991's is greater than both the 981 & 718. That said, does anyone know if that extra 1/2" on the rear of 718's would be an issue on a 981?
I managed to create this table off some of the most common wheel sizes.

Just in case anyone comes back to this thread.
Yes, the both the 991 & 718 have a slightly higher rear rim width, and the offset of the rear 991's is greater than both the 981 & 718. That said, does anyone know if that extra 1/2" on the rear of 718's would be an issue on a 981?
I managed to create this table off some of the most common wheel sizes.
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