I'm looking to pick up a few Continental Race inner tubes from Competitive Cyclist, but don't know what valve length to go with - 36mm, 48mm, or 60mm.
The rims I'm using are 32mm deep Reynolds mv32c UL. The 48mm seems like the most obvious choice, but I don't want to risk not being able to get the pump head secured on the valve stem. Do you think the 48mm length is long enough?
I know I could take my current tubes out and measure the valve stem to see where I'm at right now, but I lost my only ruler and have no other way to accurately measure them. Besides that, I switched my tires and tubes over to a spare set of wheels yesterday and forgot to measure them while they were out. I'm too lazy to go buy a ruler and take my tubes out again.
Thanks in advance!