
Here's the Specialized Roubaix 23/25c Tubeless tire on the Belgium+ rim. A good 26mm. This is really the maximum rear. As you will see I am switching the R3 to the front.
This tire involved the compressor to inflate for the first time. Hopefully it will hold air better than the R3. Does not feel as grippy - but then again the other tires I've been using are race ready road tires. This is a bit more endurance. I might put the 23c Ultremo back here once the Grasshopper is over.
This tire involved the compressor to inflate for the first time. Hopefully it will hold air better than the R3. Does not feel as grippy - but then again the other tires I've been using are race ready road tires. This is a bit more endurance. I might put the 23c Ultremo back here once the Grasshopper is over.

OK here's the Bontrager R3 25c on my front wheel (Ultregra 6700 tubeless). This is a perfect size too. Nicely paired with the back. I cleaned the bead and rim really well. I heard this is a secret to keeping these tires from losing air over a couple of days.