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PostPosted: Sat Sep 16, 2017 5:14 pm 
Hobie Approved Guru

Joined: Sat Nov 12, 2005 10:46 pm
Posts: 2773
Location: Escondido
Mmiller announced new crank arms for the MD 180.
mmiller wrote:
....And the ARC pedal cranks.
Unfortunately there were no pics, so I borrowed an image the Hobie web site and this is what they look like (with Turbofins):

The first thing you notice is that they are ovalized tubular aluminum. Next, you see they are curved (thus presumably their name). Then you wonder what happened to the squeeze-handle pin adjusters on the sides. They have been replaced with push buttons at the top of the units.

I was lucky enough to try these out recently and they feel very robust. The new push button pin retractor is easy to push, making pedal position adjustment quick and simple. As you can see below, you can even adjust with your feet on the pedals, for instance, if you need to change to a modified "flutter" stroke position to pedal in shallow waters.


Because of the arch in the cranks, your pedal position ends up being about an inch closer (about 1/2 pin distance) to your seat. In order to maintain maximum power, you ideally want full leg extension on your pedals without them hitting the stops. If readjusting the pin position doesn't get you the right leg position, it is possible to reverse the arms, as seen here (with ST fins):


Since these cranks are wider than the old version, the drums have been widened to accommodate them. If you're wondering about whether these new crank arms also come with the GT Drive, I understand that they do NOT. It looks like they can be retrofitted, however, but you would also need the new drums. Check with Hobie to verify this. 8)

PostPosted: Sun Sep 17, 2017 5:48 am 
Site Rank - Captain

Joined: Mon Jul 10, 2017 12:46 pm
Posts: 45
I disagree you want “full leg extension”. You want it just short of that.
Knee slightly bent when stroked out, like a bike.

2017 Tandem Island in Red. Lake sailing/kayaking in NH only.

PostPosted: Sun Sep 17, 2017 9:27 am 
Site Rank - Old Salt

Joined: Mon Jun 17, 2013 5:25 pm
Posts: 372
Location: Jaco, Costa Rica
Interesting RR, looks promising. Mswlogo, when we say full leg extension we mean ending with a slight knee bend (not locked out) as in biking, which you are correct is optimum. The reverse problem is usually the case where there is to much knee bend because of lack of space for bigger folks.

Costa Rica Kayak Guide
Tandem Island- 2013
Sport - 2014
Revolution 11-2015

PostPosted: Tue Sep 19, 2017 8:29 pm 
Site Rank - Deck Hand

Joined: Sun Jun 18, 2017 11:44 pm
Posts: 16
What's full benefit of this change , is there a issue with the first 180 drive . What's cost of up grade in full .

PostPosted: Wed Sep 20, 2017 8:19 am 
Site Admin

Joined: Tue May 27, 2003 12:44 pm
Posts: 12156
Location: Oceanside, California
Stronger, more ergonomic - cleaner profile, easier pedal adjustments and better pedals. There is no upgrade being offered for ARC pedals this year. As typical, the factory will be using all available materials on new complete MD180s for new boat production. Even the MD180s for parts sales will have the older pedals.

Matt Miller
Director of Parts and Accessory Sales
Warranty and Technical Support
Hobie Cat USA

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