Optima Blue tops

Any of you guys using the blue tops? Looking at getting a set of D27's. The numbering is weird, but the D34 is the smallest (reserve capicty) not CCA, then the D27 and then the D31's

Mine are starting to give up and need to be replaced, just curious about the blue tops...

I currently have 31 series wet cells

I don't use optimas but I do use gel cells and verse interstate deep cycles, which if had 3. I've had no bubbles, no troubles..... yet.

Your 31 wet cells probably had over 200 minutes Reserve Capacity when new. The biggest Optima is only 155 minutes. The 27 Optimas only have 140 minutes. I'd look at the Cabela's AGMs in group 30. They are on sale for $195 and have over 205 minute RC

Thanks, guys...... keep the input coming

blue tops are great mine are nine or ten years old now and still going strong.