I just tested one of these new tires and here's what I got (with 2017 CS 23mm for comparison):
Width / Height / CRR
2017 CS 23mm / Latex tube / Jet 6+ rim / 100 psi: 25.8mm / 23.8mm / 0.00311
2018 CS 25mm / Latex tube / Jet 6+ rim / 100 psi: 28.0mm / 25.7mm / 0.00288
2018 CS 25mm / Latex tube / Jet 6+ rim / 90 psi: ______ / ______ / 0.00300
Some comments:
(1) This is probably about what you'd expect: a bit wider, a bit faster. It's not going to make or break anything, but it is the fastest tire I've ever tested. Given the extra width I wouldn't use it in front, but maybe in the rear.
(2) This tire was *way* easier to mount than the 2017 23mm on this rim. I easily mounted it with no tools. The 2017 23mm's required tools and technique to get on. Don't know if the 2018 23mm is any different.
(3) Yes I know I get higher CRRs than Tom A does. I'm not sure why that is but it is very consistent. Believe me I've tried to figure it out. You can disregard the absolute number if you want, but the differences are 100% repeatable - I do two runs on each tire and always get exactly the same answers.
Width / Height / CRR
2017 CS 23mm / Latex tube / Jet 6+ rim / 100 psi: 25.8mm / 23.8mm / 0.00311
2018 CS 25mm / Latex tube / Jet 6+ rim / 100 psi: 28.0mm / 25.7mm / 0.00288
2018 CS 25mm / Latex tube / Jet 6+ rim / 90 psi: ______ / ______ / 0.00300
Some comments:
(1) This is probably about what you'd expect: a bit wider, a bit faster. It's not going to make or break anything, but it is the fastest tire I've ever tested. Given the extra width I wouldn't use it in front, but maybe in the rear.
(2) This tire was *way* easier to mount than the 2017 23mm on this rim. I easily mounted it with no tools. The 2017 23mm's required tools and technique to get on. Don't know if the 2018 23mm is any different.
(3) Yes I know I get higher CRRs than Tom A does. I'm not sure why that is but it is very consistent. Believe me I've tried to figure it out. You can disregard the absolute number if you want, but the differences are 100% repeatable - I do two runs on each tire and always get exactly the same answers.