Hello everyone, I have a World Models Sky Raider Mach 2. I need to buy some more wheel collars as the ones I had fell off.

The problem is the parts list in the manual say it is a 4.1mm Wheel Collar. I'm not sure what size to get off Tower Hobbies as its all in Imperial Units.

Which out of these would fit the best for normal 40-60 sized models?

3/16"
1/16"
3/32"
5/32"
1/8"

Also I have another World Models ARF that requires 5.1mm Wheel Collars, which would fit if I was to buy off Tower Hobbies?

Thank you for your help.