Originally Posted by
riotgear
Could be cable tension.
Are you missing/adding a spacer to the cassette? Can you shift past the largest cog (into the wheel) in the rear?
No spacers on Sram Red cassette's.
Start at the beginning its simple.
#1 Shift lever all the way down to the smallest cog
#2 remove cable clamp (turn in all barrel adjusters)
#3 Double check lever make sure its to the last gear selection
#4 remove chain if you can (if not it's ok but better to see)
#5 Looking from the rear set jockey wheel with limit screw so it lines up with the smallest cog.
#6 Push rear derailleur with thumb all the way to the largest cog and set its limit screw so it lines up with it.
#7 Check B screw if the clearance is not correct from jockey wheel and largest cog.
#8 Pull cable with fingers and tighten clamp on rear derailleur
#9 Using barrel adjuster remove any slack
#10 Shift up one gear if chain doesn't move to next cog turn barrel adjuster while spinning crank till it goes up one cog.
#11 Shift up one more it will shift to next cog.
#12 It's just a matter of fine tuning by shifting thru the gears and slight adjustment of barrel adjuster till it shifts well at this point all movement will be very small.
NOTE: If you do this and shifting does not work correctly you have other issues, bent hanger could be one, cable guide under BB is cracked or split some place or defective lever.
Last edited by JTGraphics; 04-19-11 at 04:22 PM.