We don't have speed traps in my town.
Sorry, you can't add violations to the ticket after the fact.The speeding violation would be dismissed due to the anti-speed trap law. Without the speed being allowed as evidence ,the reckless driving charge would be difficult to prove in the absence of other evidence.
In Practice, what happens in CA is the air unit clocks you and then radios to a ground unit that makes the stop and says that he clocked you. The court knows better, but you are convicted anyway.
Reckless Driving 23103.
(a) Any person who drives any vehicle upon a highway in willful or wanton disregard for the safety of persons or property is guilty of reckless driving.
(b) Any person who drives any vehicle in any offstreet parking facility, as defined in subdivision (c) of Section 12500, in willful or wanton disregard for the safety of persons or property is guilty of reckless driving.
(c) Persons convicted of the offense of reckless driving shall be punished by imprisonment in a county jail for not less than five days nor more than 90 days or by a fine of not less than one hundred forty-five dollars ($145) nor more than one thousand dollars ($1,000), or by both that fine and imprisonment, except as provided in Section 23104
This code section may be found online, on the California Department of Motor Vehicles website,
http://http://www.dmv.ca.gov/pubs/vctop/d11/vc23103.htm