This bottom bracket fits a Shimano crank on a BB86 (road) or BB92 (mtb) frame.
Although the crank and frame dimensions are slightly different, the bottom brackets are the same. Choose road seals for road use and cross seals for mtb, cyclocross or frequent riding on wet roads.
BB86 is the road standard: 86.5mm width, 41mm inner diameter
BB92 is the mountain bike standard: 92 or 89.5mm width, 41mm inner diameter
The bottom brackets between these two options are the same, only the seals are different. It is perfectly OK to install a BB92 bottom bracket on a road or gravel bike for extra protection