Stacyc 19mm Mini Bar Riser Kit 19mm Bar Riser Kits increase bar height by 4 with the smaller diameter Mini Bar, giving your taller kiddo a more comfortable riding position and a better grip on the bars. This kit is only compatible with 12eDRIVE and 16eDRIVE bikes that are equipped with the 19mm handlebar/throttle assembly. Features: Compatible with 12eDRIVE and 16eDRIVE bikes that are equipped with the 19mm handlebar/throttle assembly Increases bar height by 4, giving taller kiddos a more comfortable riding position 19mm Mini Bar provides 28 smaller grip diameter compared to the original Stacyc grips Smaller diameter offers a better hold on the handlebar while operating the brake Includes: Stacyc branded 19mm Tall Mini Bar Anodized stem and head tube spacer Longer brake cable to accommodate height Required to Install: 19mm throttle assembly 19mm Stactc grips and bar end plugs 19mm brake perch shim Note: If your bike is not already equipped with the Required to Install items, also purchase Stacyc Part # 500018 (for 22.2mm stems). See last image to confirm if you already have a 19mm throttle.