Hi guys, I am doing my final year project at Brunel Unviersity on improving mountain bike performance.

Please could you spare 2 minutes to complete my survey:

http://www.kwiksurveys.com/online-survey.p...IJNMHM_b8927352

Thanks

Ross

Done but ypu should have included and option for no gear changers (Singlespeeders)

Done

Potentially great concept.

The solution needs to be light, cost effective (no £3 CO2 cartidges every ride for example) and practiable, i.e performance benefits out weighing any penalties such as weight.

Not sure how you can achieve a solution as a bolt on system for existing bikes.

Good luck.