TC Locking Strap Bike Cycle Handlebar Mount Holder for Nokia Lumia 830 (sku 20995) Locking Strap Mount with TC Cradle for the Nokia Lumia 830. Suitable for most handlebars. Ideal for awkward, irregular sized handlebars. Strap is suitable for square, oval & round handlebars, frames, poles or bar. Fits minimum diameter of 21mm & maximum diameter 40mm. The bespoke cradle with a unique fliptop access, contours your Nokia Lumia 830 perfectly. The cradle has been designed to contour the Nokia Lumis 830 only, therefore it is not suitable for use with a protective case or skin. All phone function area & camera remain accessible.