PedalingHertz wrote:
Thanks. I'm going to keep researching the issue. I like that the November wheels are wider but wonder if I really need the 28s on the race set. If not, I may just go with the heds and use 25s. As you say, I def want them on my stock wheels for everyday use. But I don't think I want to race on my stock set with 28s on them due to weight and aero penalty, so I'll wait until I have a dedicated set of race wheels to do that. With 2 local tri sprints coming up in the next 2 months, I'd like to get the upgrade done relatively soon. If you make your bike faster and don't race it, you didn't really make it faster, did you. :)
If I was you I'd probably get something like HED Jet 4 or 6 plus, fit 25mm GP5000 tyres and see how they feel. A wider rim increases the air volume compared to the same tyre on a narrower rim. So the HED will be more comfortable than the Ultegra wheel with the same tyre. Also the 25 or 28 label on the tyre is not the whole story. For example GP4000 tyres were far bigger than the labelled size on most rims. GP5000 has apparently dialled it back and is much closer to the labelled size. From what I've seen a GP4000 23 is very close to the size of the new GP5000 25.
You'll find inflated sizes of the GP5000 tyres on a 17mm rim at the link below:
https://www.bicyclerollingresistance.com/...omparison#sizeweight