Increase your speed and performance while taking your fitness routine to a new level, all in one! Achieve up to a 10% boost in speed by upgrading to Hobie's ST Turbo Fins. In addition to speed, this longer fin design makes your ride more efficient requiring fewer pedals per mile. With our Square Tip Fin design, you are likely to experience an increase in resistance similar to biking on an increased incline. Upgrading to Turbo Fins is particularly beneficial for kayakers using Hobie's sail kit. This kit comes with 2 fins and 2 longer masts.