The number of offences carried out by criminals using mopeds in London has increased by 30 times in last five years, data showed.
The data, obtained by the BBC, showed a jump from 827 offences in 2012 to more than 23,000 last year.
High car insurance premiums and the boom in delivery services such as Deliveroo have increased the number of mopeds, an expert said.
Police insisted they had not lost control of moped crime but "there was more work to do".
During the period covered by the figures, more than 40 per cent of such offences happened in just two boroughs.
A Met Police superintendent said the surge in Camden and Islington was "disappointing", but new measures were helping to reduce offending.
"Moped-enabled crime" describes offences carried out by people on mopeds or scooters, including drive-by thefts of pedestrians' phones and bags.
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