Grasshopper rims are 3 piece. Just take out the 5 screws and insert the center into the rim then screw back together the front and back sides. No need to stretch at all.
Pro-Line/MIP/Team Scream Racing/Dirt Skinz
Wolcott Hobby/PinShop Hobbies/RCHR
T5M, tekin rsx, d3.5 9.5
B6, hobbywing v3.1, tsr 17.5
Tekno Eb48.3, rx8 gen2, t8i 1950kv