What would be the smallest size running guide I can use on a spinning rod using 12 lb monofiliment Line? I'd like to go with size 6.

Larry

I once gave up fishing. It was the most terrifying weekend of my life.

Depends on the knots you entend to run through the guide. Otherwise there should be plenty of room for the line.

I use size 4 if I can get a matching sized tip in the style guide I want to use.

2 or 2.5 mm if you are not using leaders

6 is a good all rounde. I have 4.5s on some spinning rods for Ultralight works. As the lads said, it is down to the knots you use for leader connection (if any).

Larry, keep in mind a given guide size is the OD of the ring, not the ID. A pac bay minima 4 will have about the same ID as an alconite 6.

If there is any one place where rod building has evolved it is in guide sizes and weight. I build offshore saltwater rods. Used to be I always had underwraps and double foot guides. Now I never do unless above 30 pound class. You will be surprised how much difference it makes. So my advice is minima's in size 4.

Russ in Hollywood, FL.