All 2017 Hobie Mirage Kayaks come as standard with a Mirage Drive 180 equipped with MD180 ST fins. Hobie also produce a longer MD180 ST Turbo fin. This larger fin gives increased performance by providing greater top end speed and a lower cadence at cruising speed. They are available as an upgrade kit and can easily be fitted to a Mirage Drive 180, in place of the standard ST fins. This blog post runs through how to upgrade the MD180 ST fins to MD180 ST Turbo Fins.....
MD180 ST Fin vs MD180 ST Turbo Fin
The ST Turbo fin is longer than the standard ST fin. This provides more surface area, and therefore more resistance against the water whilst pedalling, resulting in more thrust! Its not all about going fast though... you can get a greater top end speed and a slower cadence (less pedals for a given distance) for cruising.
The ST fins are approximately 260mm long and 90mm wide at the tip, whereas the ST Turbo fins are 50mm longer at approximately 310mm long and 90mm wide at the tip. The ST Turbo Fin is therefore around 4500mm²²² squared (45cm squared) greater in surface area than the ST fin. Over the two fins thats 9000mm squared (90cm squared) more fin pushing against the water, providing more propulsion and power!
The is a small disadvantage though - the ST Turbo Fins are a little harder to pedal - but in return provide increased performance.
Hobie MD180 ST Turbo Fin Kits
- 2x MD180 ST Turbo Fins
- 2 x Threaded Turbo Fin Masts
- 0.5ml of Loctite 243 Thread Locker
- Installation Instructions
- 1/8" (3mm) Allen Key / Hex Wrench
Fitting MD180 ST Turbo Fins to a Mirage Drive 180
Step 1 - Removing the MD180 ST Fins
Step 2 - Removing the MD180 ST Masts
Look closely towards the end of the mast and you'll find a flattened area.
Step 3 - Instaling the Turbo Fin Masts
Step 4 - Fitting the MD180 ST Turbo Fins
Hobie warn not to over tighten the fin tensioners - the fin must be able to move from side to side in the traveler slot located in the boom. If the fins are too tight, it will lock up and not move in the traveler slot, potentially causing damage to the fin or the adjustment hardware.