Round 2 of getting absolutely nowhere with my Ridley CX build. Background, I’m running a set of 50mm carbon wheels on my road bike, I use the Continental Presta 60mm 700x18-25 Race 28 tubes, and the valve sticks ~10mm out of the wheel as you’d expect.
Tonight, I went to put CX tires on the wheels using the Conti Presta 60mm 700x25-35 Cross 28 tubes, but the f*cking valve is only 45mm long. It comes nowhere close to clear the carbon section.
WTF? I bought three of these tubes, all have a 45mm valve, but the box clearly says 60mm, just like the 18/25 tubes, and the 18/25 tubes are spot on 60mm.
The help bit is this, can I run the 18/25 tubes with 34mm CX tires? Or is this going to pose some sort of problem. I also don’t know where I’m going to get a CX tube 25/35 with true 60mm valves, I do NOT want to run extenders, especially in CX.
I would have thought that this could cause you some problems. The advice that I have always been given is to run within the recommended widths. I have run 28c with the narrow size for a year of commuting without issue, but perhaps 34 is too much? Paging Nikcee…
To be fair, I ran a 18/25 conti tube on my rear wheel, with 35c conti contacts for well over 9 months with no problems. No problems at all and the only reason its not in there anymore is because the new conti contacts I bought (32c) came with tubes.
I’ll run extenders if I can source some proper ones with a valve, the type where they screw on to a tube w/o a removable core I don’t like, especially if there is potential for the wheel to be dunked in mud and water. For this weekend I’ll just have to run the 60mm 18/25 tubes and hope for the best.
I think it is getting f*cked by Conti, their box says the product has a 60mm stem, when in reality it’s a 45mm. That’s poor on their part.