Duffy Moon transforms into ...

Road Rocket!

Inaugural ride tonight of the new High Speed Drive on the Duffy Moon (Catrike Road). After a short 13 mile ride I have to declare the moon has set and the Road Rocket is born. With the old front end I was spinning out around 23 MPH, sometimes higher but not often. The trike would go faster downhill but my pedals were free wheeling. Tonight I hit 33 MPH downhill and still had room to go. I only slowed because of traffic. If this helps me get my average to the mid teens it will be great.

This is certainly the "honeymoon" period but it looks like a great investment so far.

Basically with the HSD you have two gears on the front - 27T on the low side and a 67.5T. Luckily this is a planetary (internal) gear system. A 67.5 tooth ring, if you could find one would be huge. So I dropped from a 3 ring cassette in the front to the equivalent of a 2 ring cassette. Basically I now have 18 gears - 9 low and 9 high. I still need to tweak the rear shifting a bit after shortening the chain but tonight she climbed like a billy goat and sprinted like a cheetah. Shifting is done by clicking a button with the heel of the foot and because it's internal gearing you can drop from the high end to the low end while stopped. That could be handy when I mess up my gear choice and stall on a hill.

For more information on the HSD and gearing for trikes visit this great article from Utah Trikes:
http://www.utahtrikes.com/ARTICLE-7.html

I shipped them my boom, they did the modifications on the same day and it was back out the door to me. Great service and competitive pricing.