This genuine STACYC replacement throttle is made for STACYC 12eDRIVE and 16eDRIVE bikes equipped with 19mm Mini Bars. It includes the throttle and grip. PART NUMBER: 420031 FEATURES Genuine STACYC replacement throttle Fits 19mm Mini Bars Includes throttle and grip Direct replacement for the original 19mm throttle FITMENT STACYC 12eDRIVE models equipped with 19mm Mini Bars STACYC 16eDRIVE models equipped with 19mm Mini Bars Not compatible with 22.2mm (7/8-inch) handlebars Not compatible with STACYC 16eDRIVE Elite, 18eDRIVE, or 20eDRIVE models NOT SURE IF THE THROTTLE HAS FAILED? Before ordering, watch our STACYC 12eDRIVE and 16eDRIVE troubleshooting video to help confirm whether the throttle is the problem. If you are still unsure, send us a message and we will help walk you through it. WHAT'S INCLUDED One STACYC 19mm replacement throttle with grip NOTES Check the handlebar diameter before ordering. STACYC 12eDRIVE and 16eDRIVE bikes may use either a 19mm or 22.2mm throttle, depending on the handlebar setup.