What is a good rod length and action for deep diving crankbaits?

A solid GLASS rod six-foot to seven-foot-six with a medium to medium-heavy action would make a hell of a crankin' stick.

A long time ago when Fenwick Fenglass Lunkersticks were the sh*t, pros from all over used those as crankbait rods. I'm sure a few of the older guys still have some in their arsenal. I do. A little five-foot-six Lunkerstick 2000.

I'd go with a solid fiberglass rod, as you don't need the sensitivity of graphite when crankbait fishing. When you get a bite, you'll KNOW IT. For long casts, at least a six-foot-six rod is needed, but a seven-foot or even seven-foot-six medium action rod will do best. Softer rods will allow the bass to inhale the lure, resulting in more hooked fish and longer rods allow longer casts and better hooksets. A Quantum® Kevin VanDam Signature Series Crank Rod would be idea, they cost $80 at Bass Pro Shops.

Also, ten-pound fluorocarbon will get your crankbait down the deepest.

IMO the best set up for crankbaits is a 7 foot team daiwa green handle glass rod with a revo stx and 12 lb yozuri hybrid

I use a 7' medium-heavy rod with fast action for most of my fresh water fishing (with the exception of big game fish like muskie). I like rods >7' for the extra casting distance, especially when trying to run my lures deep. A fast tip will alert you to strikes more quickly but will also slow your cranking motion. If you don't care too much about distance you could try a shorter, stiffer rod for fast, immediate cranking with less sensitivity (probably better for larger fish).

7' 0'' Medium Heavy

about like 8 - 10.

7' med/fast action

8 inches?

6.5' to 7' with medium/heavy. YOU CANT GO WRONG !!