probably not. 23mm and 21mm's difference shouldn't be anywhere as noticeable as moving from 17mm to 21mm (or 13mm to 15mm then to 17mm).Beaver wrote: ↑Thu Apr 19, 2018 6:57 pm
I'm 70kg and run the 25mm 4000S II on 21C with 58psi front and 65psi rear. Question is, if I would notice any difference with 23C as the side walls already stand "straight". Could I go another 5psi lower or not...? 30mm on the outside would mean better aerodynamics than the 28mm I have now, but again, the difference will be in the lower one digit watt area at 45km/h - would anyone notice?
It's just another 'a bit wider, and deeper' option available. It's for people running narrow rim to upgrade to. Not really for us who already have 21mm inner width rims.
It'll be my choice when i move to disc brake for sure, though.