Grafton spring tension allen key size?

[royaloaker]

time for a total redo of the '90 8900 & run into a head scratcher.while cleaning the canti's the set screw allen head seems a bit of an odd size.1.5mm is too small & 2mm too large.anyone recall what size fits the spring tension adjuster?

 

[Frankenorange]

How about an imperial allen key size ? 1/16th inch for example.

1/16th inch = 1.58mm

 

[gtturbo]

As above pretty sure it's imperial not metric. I've got some here. If I get a chance I will check.

 

[royaloaker]

mystery solved-.050 or 1.23mm.