PocketBiker
Member
I personally don't use them.I'm a friction/GEBE user, as such my gas is always in a antifreeze container either between my legs at shin level (diamond frame), or behind and beneath me on my recumbent.I honestly can't tell any difference other than liquid weight.I'm a straight line flyer, so maybe hard/frequent slalom would tell different, but as a commuter, no diff.
Oh, okay, so your fuel is at a very low point. Because my tank will only be 4-5" wide, there wouldn't be much side movement, but the tank is at a pretty high C.G. and about 17" long, so it seems like it might be more of a factor and maybe a good idea to keep the fore and aft movement down.
I wrote the seller of the foam who is a landscaper by day and a 20 year bike racer by night. He said he fills the tank with the foam and has used the same foam for 5-7 years in tanks.... but he did say that he always mixes his gas and oil in a seperate jug. (not in the tank) This would be very inconvienient for me, so I think filling the tank, say....... 2/3ds with foam, might be a good comprimise helping to keep the fore and aft slosh down and still allow enough "slosh" to mix the fuel right in the tank. The cool thing is, you can always add or take away foam as desired.