BK that's an interesting question , So why are you asking, what do you really want to know ?
Because the time it takes to drive out of the beams, depends on the car, track slicks , etc, a 1.25 sixty ' time will be different with a 1.00 sixty, right ?
I assume your question is a theory , 1.25 with 25" tall tire. Your photo is a FED, and more than likely you have a 21.5" to 22.25" tall wheel/tire, if you ran a 25" tire that would be about a 3.00x18 tire [ big and kinda heavy] A 2.50x18 tire is 23 3/4", and a 2.75x18 tire is 24 1/4" , so yes a taller tire will have more roll out.
If that is your question, I have something for you; about 4 years ago I built a 21" wheel with a 27 1/2" tall tire, for more roll out for a FED to race on a Full tree in Comp Elim, not a .40 pro tree like we run in JrFuel. I measured the roll out difference on two cars one with a 21 1/2 tire and the other 27 1/2" tire, the 27 tire had 5" more roll out. before the start line beam would make contact.
Keep in mind a full tree means you can leave before the last yellow light, not so on a pro tree. BTW the 27" front wheel racer has sub 1.0 sixty's like .956, one reason is he is getting a 5" head start on the lights.
Our JF car I run 18" wheel with a 2.00x18 rib tire, which is 22 1/2" tall, the same as front runner tires , but less rotating weight and less friction., on a .40 Pro tree.
I don't know how you could figure the time to roll out of the beams with your 25" tire, because each car combo is different. Like compare a Big Show NHRA Top Fuel car with 23" tires but sixty's in the .8"s
I hope this doesn't make things more confusing !
Jon