[Closed] Giant AC2........little bolt on back of seat tube bout 2" up fom BB?

for a bolt on brake arm to allow the use of a floating rear brake caliper?

It might be to allow a little pulley thing, for an under-BB routed front mech cable or a top tube-routed cable or something. Maybe.

is it to use a bottom pull front mech with the top pull routing (if you use a guide wheel)??

I don't know what it was meant for but I found it a great for mounting a device I knocked up in work to stop the chain dropping off the granny ring when I ran a 36/22 combo. It was like a e type mech backing plate but used that bolt on the frame to add stiffness.

Doug, did you/have you got a normal deraileur up front?

i.e. nothing like in the link below?

[url] http://www.chainreactioncycles.com/Models.aspx?ModelID=20686 [/url]

if a normal, were is it mounted, top or bottom pull and have you got a pic of your chain guide set-up?

thanks