One key difference is the way the ball bearing race track is formed.
Nylon garage door rollers ball bearing 7 stem 10 pack.
Because some doors are constructed with a double bracket double hinge setup there is also a need for longer 7 and 9 inch stems.
The old 13 ball roller was rated for max 75 lb load sections and 15 000 cycles.
Xike 10 pack blue 2 nylon garage door roller 7 stem quiet durable and high load use 6200 2rs double seals precision bearings.
These longer stems extend through 2 brackets or 2 hinges to support the weight of the door and help mitigate any horizontal movement on the door.
The standard residential garage roller stem length is 4 inches.
Dura lift ultra life 2 reinforced 6200z bearing nylon garage door roller and 4 stem 10 pack 4 8 out of 5 stars 127 xike 10 pack blue 2 nylon garage door roller 7 stem quiet durable and high load use 6200 2rs double seals precision bearings.
The roller which looks like a wheel is very hard plastic but with a bit of a rubbery feel.
99 xike 10 pack 2 in nylon garage door roller use 6200zz shield bearing rotate quiet and durable 4 in stem and reuse more than 100 000 cycles blue.
75lbs per roller 50 000 cycles please note.
The dura lift ultra life max 2 inch nylon garage door roller with 7 inch stem is the ultimate garage door roller for your heavy glass or wooden garage and or.
4 9 out of 5 stars 587.
They are rated at 200 000 open and close cycles for a 110 lb.
7 16 11 13 ball bearing rating.
The new 11 ball roller is also rated for max 75 lb sections but passed 50 000 cycles.