Senior Member
Join Date: Feb 2006
Location: Sin City, Nevada
Posts: 2,886
Bikes: Catrike 700, Greenspeed GTO trike, , Linear LWB recumbent, Haluzak Horizon SWB recumbent, Balance 450 MTB, Cannondale SM800 Beast of the East
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That is not necessarily correct that the bottom of the RD will be further from the ground than on a trike with 20" wheels. Depends upon the way the trike was equipped. The distance between the ground and the bottom of the RD on my Greenspeed GTO with 20" drive wheel and a gear range of 14 to 132 GI (3X8X2) and using a short cage Shimano 105 RD is almost exactly the same as my Catrike 700 with a gear range of 28.5-124.2 GI (3X10) and using a long cage RD.