36mm Inner Width for Plus Tires?

#1
My friend is upgrading his stock wheelset to a custom set from Industry 9. They only offer rims with a 36mm inner or 46 inner width. He currently has 40mm inner rims and runs 2.8 tires. Is going from 40mm to 36mm a bad idea for 2.8 tires? how about for 3.0 tires?
 

thegock

Well-Known Member
#2
46 for more volume for rocks, NJstyle. Have 50mm Nextie Jungle Fox on the daily driver with 3/2.8"

Also, I'm running 35~ for more pop on the phun bike with 2.8"