Originally Posted by
dynaryder
My Speed Pro TT has a DualDrive setup(stock). It does give a nice wide range,and you can shift the 'triple' at a stop. But it's heavy(3lbs 11oz for the wheel w/cassette),you need to carry a 15mm wrench for the wheel nuts,and you have a shift box that sticks out the side. Between the weight and the box sticking out the side(not covered by the fold),I really kinda wish it had a double or triple front instead.
I also had a dualdrive with my Mu p24 and felt the extra weight in the rear hub. Sold it. There's a sacrifice though if you switch to chainrings because you lose top end gear inches. A 60t chainring on 406 wheels would max out only around 100 gear inches (unless you use a Capreo). With the DualDrive you get greater top-end.