Sigma Sport is the UKs largest road cycling and triathlon store. Stocking leading bike brands such as Specialized, Trek and Focus. Our knowledgeable and .brOn Thursday 30th October 2014 Sigma Sport hosted the second annual #Rule9 Winter Event- an evening dedicated to all things winter cycling. More info .brThe Road Cycling and Triathlon experts. Based just outside of London and within close reach of the Surrey Hills, Sigma Sport offer a unique shopping .brOn Thursday 22nd October we held our 3rd annual #Rule9 Winter Cycling Event. This evening was dedicated to riding through winter. Read more .