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Fitting Services

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After years of development, Specialized have launch their BG FIT service in the UK and Sigma Sport is one of the first dealerships to become fully certified. The unique system has been developed for Specialized by fit expert, Dr Andy Pruitt PA, of the Boulder Centre for Sports Medicine in the US. With over 30 years experience in helping World Champions, Tour de France winners and cyclists of all level ride faster, longer and in greater comfort, Andy Pruitt has developed a system that enables the fitter to analyse an individual's needs and adjust their bike based on their unique body characteristics, experience level and cycling goals to maximise comfort and performance - ultimately improving the lives of riders.

The basic four principles of BG FIT are:

  • Bike fit is a marriage between the bicycle and the rider
  • Make the bike fit the body; don't make the body fit the bike
  • Dynamic bike fit is better than static bike fit
  • Cycling is a sport of repetition.


In order to get certified, staff have been through an intensive training course and then been monitored by staff from Specialized's Fit University while carrying out fittings. The first two members of staff, Lee Dumbarton and Mick Silles, received their certification earlier this month with other staff members due to get their training soon.

A complete 3D BG FIT takes around two hours and costs £120. The results include maximised pedalling efficiency, endurance and increased comfort. The session involves both on- and off-bike measurement as well as using your bike on a turbo trainer to assess the effect of the dynamic adjustments being made.

  • rider assessment interview
  • flexibility assessment
  • structural assessment
  • dynamic saddle height adjustment
  • dynamic fore-aft saddle adjustment
  • dynamic handlebar height adjustment
  • cleat adjustment
  • footbed fitting
  • hip, knee and foot alignment
  • other adjustments as needed


All sessions are pre-bookable and take place at our new fitting studio which is located at the warehouse ,so please phone or email to make an appointment, don't just turn up at the shop!

The fitting service is available for road bike and time trial/triathlon bike set-ups.

This is what Lee has to say about the new system:

"Yet again, Specialized have come up trumps with a fantastic fitting system. This allows us to customise the fit of a bike for each individual and improve their riding efficiency and comfort. This fit understands that a rider's position evolves with their riding and allows for future follow-up fits to maintain the effectiveness. I firmly believe that this investment of £120 and two hours of your time is the best investment that you'll ever make in your bike."

Our regular bikefitting service will continue to be provided in-store for those looking to get sized for a new bike and this costs £35 which will be rebated against the cost of any bike or frame purchased in the store.


BG-Fit for the Saxobank team


Our Specialized BG-Fit service has been growing in popularity since its introduction and many riders from novice to seasoned racer have taken the opportunity to visit our 'fitting studio' and go back to basics. We really cannot emphasise strongly enough how important having a bike fine-tuned to your personal requirements is and now it seems even the most experienced riders, including Olympic champion Fabian Cancellara, have embraced the BG-Fit system which was developed by Dr Andy Pruitt.

Anyone interested in the BG-Fit concept may find this link to the recent session that Bjarne Riis and the guys at Saxobank underwent additional confirmation that Specialized The BG-Fit service should not be considered a luxury or a flight of fancy.

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