FAQs14 Sep 2004, Posted by amp in
Q: What kind of headtube?
A: Pre 2012 1-1/8 integraged, 2012 and after taper style 50mm bottom cup
Q: What size bottom bracket?
A: The amp uses an English threaded [aka ISO] 73mm width and works best with 118mm BB spindle or longer.
Q: Whats the biggest tire that can fit?
A: The Amp was designed around a 2.30 tire, however depending on the tire it may accept a bit larger but then your mud clearance will suffer.
Q: What is the best gearing for single speed?
A: It depends on you, but general guys like around a 2:1 ratio or 52 gear inches . For example a 22 tooth front ring with a 12 tooth cog at the back. There are some great resources online and one of the best is Sheldon Brown