How big are my nipples?!

dogboy73
dogboy73 Posts: 440
edited August 2010 in MTB workshop & tech
Need to buy a spoke key/wrench but I'm not sure what diameter the nipples are on my wheels. Do they tend to be a more or less standard size on most MTBs? Or should I just buy one of these to cover likely sizes?;

http://www.chainreactioncycles.com/Mode ... delID=3976

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