Which water reservoir for frame pack?

Obv depends on the bag size, but I use this and fits in my Revelate Tangle perfectly with the ideal hose position. It's only 50oz. but I generally have bottles, too, on long range and will tend to use those to refill the Ogio.

https://www.dynamicdiscs.com/Dynamic-Discs-Ranger-H2O-Backpack-Water-Bladder-p/4990.htm

GHC wrote:hard to answer without knowing the size/brand of your compact frame bag, or the brand and capacity of the current reservoir that is too large. 

Given that .....Camelbak or Platypus or MSR Dromedary/DromLite have multiple sizes and/or internet search Hydration Bladders for something smaller that will fit your design.

I have run a Revelate Tangle with Platypus before.....but not sure that applies to what you are asking.   

Kwontumspeed wrote:

Obv depends on the bag size, but I use this and fits in my Revelate Tangle perfectly with the ideal hose position. It's only 50oz. but I generally have bottles, too, on long range and will tend to use those to refill the Ogio.

https://www.dynamicdiscs.com/Dynamic-Discs-Ranger-H2O-Backpack-Water-Bladder-p/4990.htm

GHC wrote:The lumbar version will work good if the bag will stay flat'ish in your frame bag.    If you think the bladder is going to slide down into lower bottom of the V in your frame bag (IE not stay flat), the non lumbar version might work better.   Depends how sloped your top tube is...and what you have in the bottom of the frame bag.

GHC wrote:hard to answer without knowing the size/brand of your compact frame bag, or the brand and capacity of the current reservoir that is too large. 

Given that .....Camelbak or Platypus or MSR Dromedary/DromLite have multiple sizes and/or internet search Hydration Bladders for something smaller that will fit your design.

I have run a Revelate Tangle with Platypus before.....but not sure that applies to what you are asking.