Sram mrx 3 speed twist shifter micro front shimano compatiblethe mrx ergonomic shifter is the original gripshift shifter that has sold in the millions across the globe44 because of its entry level price and compatibiliy with dirt and shimano derailleur systems it is now available with some of the new technologyergonomic hex profile shifter cover with soft density gripsram composite constructioncompletely enclosed cables seal shifter from contaminateseasy cable change grip cover3 speed left