Two mountain bikes worth about £6,500 in total were taken from garage at a property in Barn Way, Trowbridge.
It was was broken into between January 22 and 26.
The missing bikes are a neon green coloured Orange Crush with spank tyres and a white Orange Patriot.
A brown and black Giro helmet, cyclist trainers and pump were also taken.
Any witnesses can call Wiltshire Police on 101.