Had to replace the Bontrager R3 after about 1000 miles since it would no longer hold pressure for more than a few minutes. Must've worn wherever it was thinnest and slowly leaking anyways. I put my OEM Schwalbe Ultremo ZX 23c back on. It did not last long however. It got a cut in the sidewall on a descent on Mt. Diablo. I had just ordered a Schwalbe One 25 and an IRC Roadlite 25 as well since I love the feel of 25 lower pressure tires. Below are pics of mounting the IRC. It was a bit tighter than the Schwalbe Ultremo but still doable by hand. It inflated really well first blow from the compressor - the beads seemed to spring out nicely to seal up (and I had used dishwashing mixture to lubricate).
 Here's the cut in the Ultremo. Not fun on a big descent. |  The IRC measures 25.5mm on the Ultregra tubeless rim. |
So the IRC is a really nice width - just a tad wider than the Bontrager R3 and 2.5mm wider than the 23 Ultremo. Definitely wider than the rim but maybe as some point in can get a wider front rim to match 25 tires better.
I also measured the distance between the bead lines just to see if this was an indication of inflated width. The IRC 25 measures 61mm and the Schwalbe One 25 is 60mm.
I think both of these 25 tires will be too wide on my rear rim so I will stick with the Roubaix or maybe use my other remaining Ultremo 23 on there when it wears out. It's got 1300 miles on it and is looking a little squared off but gripping well.
I think both of these 25 tires will be too wide on my rear rim so I will stick with the Roubaix or maybe use my other remaining Ultremo 23 on there when it wears out. It's got 1300 miles on it and is looking a little squared off but gripping well.
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