You could borrow helmet from the club. Preparing biking jersey and gloves by yourself. If you don't have any biking jersey, then T-shirt and shorts are fine too.

头盔可以向俱乐部借，骑行服和手套自备，如没有骑行服，穿T恤和运动短裤也可。

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Al: Don "t forget your puncture outfit and crash helmet."

艾尔：别忘了带爆胎装备和护头盔。

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For the most part, neuropsychologists don't like helmet laws.

大多数神经心理学家并不喜欢安全帽法规

耶鲁公开课 - 心理学导论课程节选

There wasn't a helmet involved this time.

WSJ: Manningham's Tyree Moment

You won't need a helmet, but you'll still have some wheel fun.

CNN: ASIANOW - TIME Asia | Travel Watch

Dredd's partner, an anxious rookie named Cassandra, doesn't wear a helmet, since it would scramble her psychic powers, so she is played visibly, as well as audibly, by Olivia Thirlby, who succeeds in investing an action figure with affecting fear, impressive courage and a commitment to justice that serves as Cassandra's compass.

WSJ: Dredd 3D | How to Survive a Plague | End of Watch | Trouble With the Curve | Vivid Dredd 3D Makes Rival Thrillers Look Flat | Film Reviews by Joe Morgenstern