The system ex adjustable stem a wonderfully impressive with its powers to adjust from a zero degree rise through to a 60 degrees rise the stem gets you riding in the right position for you and with cold forged and heat treated aluminium power you can enjoy it for a very long time system ex adjustable stem features secure and easily adjustable cold forged and heat treated 6061 aluminium alloy compatible with handlebar size 254mm and 318mm adjusts through to 60 degrees