| CPC B62K 21/125 (2013.01) | 11 Claims |

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1. A structure of adjustable extension handlebar for mounting on a handlebar, comprising:
an extension module comprising an extension body, wherein the extension body comprises an extension portion and a fixing portion, the extension portion extends from the fixing portion in an extension direction away from the handlebar, and the extension body is connected to the handlebar by the fixing portion; and
a griping module comprising a base and a griping body, wherein a gap is formed between the base and the griping body, the base and the griping body are connected through a first fastener, and the griping body is configured for a user to grip;
wherein the base is pivotally connected to the extension portion with a first pivot being not parallel to the extension direction, so that the base is rotated along the first pivot, and the gap is closer to the griping body than the first pivot;
wherein the base comprises a base body, a joint portion, and a plurality of first joint structures, the joint portion is arranged on one side of the base body, the first joint structures are disposed on one side of the base body, and the joint portion is connected on the extension portion through a second fastener.
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