SRAM X0: http://sram2x10.com/?p=881
SRAM X9: http://sram2x10.com/?p=877
SLX: http://cycle.shimano-eu.com/publish/content/global_cycle/en/nl/index/products/mountain/SLX.html
XT: http://cycle.shimano-eu.com/publish/content/global_cycle/en/nl/index/products/mountain/Deore_XT.html
XTR: http://cycle.shimano-eu.com/publish...ountain/new_xtr/component_systems/trail.html#
SRAM X9: http://sram2x10.com/?p=877
SLX: http://cycle.shimano-eu.com/publish/content/global_cycle/en/nl/index/products/mountain/SLX.html
XT: http://cycle.shimano-eu.com/publish/content/global_cycle/en/nl/index/products/mountain/Deore_XT.html
XTR: http://cycle.shimano-eu.com/publish...ountain/new_xtr/component_systems/trail.html#