Ok.. in my endless quest for SS/Fixed knowledge.. I came across another question... what gearing should I use... I live in an area with some hills... as far as chainrings go I have a 52, or a 42... I'm thinking of using the 42.. and maybe a 16 or 18 in the back... any thoughts ?

also... if I get a BMX style cog... do they just thread on ? and if so will I also need a lockring ? if they don't thread on will I need spacers, since my hub is an old school style freewheel ?

Thanks

Jeff

p.s. Thanks for all the help in my other posts.. I have read all the links ya'll gave me... and they were great.. just need some more in-depth help :-)