Anti roll bar diameters

Can someone plse confirm that the XJS roll bar has a diameter of 7/8 " ( 22.5 mm )

Rgds
Gerald

Iā€™m 99% sure it is.

20 char

Curious to know myself if anyone else has measured ā€¦ my 86 XJSC has Front 26.5mm (1ā€) & Rear 19.4mm, both have Harvey Bailey Engineering stickers on them so possibly not standard?