Originally Posted by
exeo
Hmm, it appears there are metric and imperial sized allen keys! Gees. I have imperial and the bike must be using metric, my keys 'almost' fit, thankfully I didn't try to force a fit. I noticed there is a nut at the base of my presta valves, what are they for and are they suppose to be in a certain position?
I use a set of T handle metric allen wrenches. Can buy them on sale at Harbor Freight for around $6. Been using them for years. I even bolted a set onto the side of my work stand.
I rarely use the nut on a presta valve. Your choice. Tubes come with various stem lengths. No reason to change. Just remember when you replace a tube to match stem length. "Pulling it out" is not going to work. Short is short, long is long. I have at least three different length stems in my tube supply right now. Deep V rims need longer stems.
Sure enough, on sale right now for $5.99
http://www.harborfreight.com/10-piec...set-37862.html