Thieves stole two electric bikes worth £7000 after they allegedly broke into a garage on Ferndale Road.
Officers are investigating, following the incident overnight between November 21 and November 22.
As well as the bikes, the suspects stole two padlocks and a charger.
The victim was left shaken and extremely upset as a result.
Wiltshire Police say enquiries are ongoing and have released a description of the bikes which is as follows.
A black Orbea Gain worth approximately £3000 with the frame Ara 194002319
A blue/grey Treks Powerfly 7 worth approximately £4100 with an unknown frame number
Photographs of the bikes are above.
Police are now appealing for anyone who witnessed any suspicious activity in the area and anyone who may know where the bikes are.
They are being asked to contact the force on 101 and quote crime reference number 54220123200.