Garage door rollers, replace

Question

i have 4 in metal and would like to repace them with nylon, witch is better the 4 in or the 7 in?

Answer 1

I assume you are talking about the length of the shaft and not the dimension of the rollers.  Sorry, all I've ever seen is metal ball bearings.

Dave

Answer 2

If you buy good quality rollers, nylon is better and quieter. They also have a higher lifecycle. Put 7" rollers in the top and bottom and 4" in between. The 7" rollers will help keep the door in the track if you ever break a door cable. You can of course use all 7". Be very careful with the bottom roller. 7" might be too long to fit. Cut off excess with a hacksaw. Also bend door track to pop roller out, do not remove bracket. It is attached to the door cable and springs and taking it off WILL make bad thing happen.