[NHAero]

Mark, are you saying you can get a Force22 road crankset and mount a 104/64 spider on it? And if so, does SRAM make the 42-28 rings to hang on it?

Originally Posted by Mark McM

T47 BBs are available for 24mm and 30mm spindles, which are the most common integrated sizes for cranks with integrated spindles, so there are many models of cranks that will fit. Some of these cranks will fit subcompact chainrings. Here are a few:

Sugino OX series cranks. These aluminum cranks arms with 24mm spindles have a 110mm outer BCD and 74mm inner BCD. Chainrings in a wide range of sizes are available, including 42-28.

SRAM XX 2x cranks. These carbon cranks are actually intended for MTBs, but the Q156 version may work okay for road bikes as well, due to their 156mm Q factor. These are available with either 24mm or 30mm spindles, and have a 42-28 chanring option.


I'm currently setting up a bit of a "Frankenbike" drivetrain that will allow a huge range of chainring sizes (anything from 34-22 to 53-39) with a low Q-factor road crank. As it happens, SRAM uses the same 3 bolt spider mount on several of their road and MTB cranks, and spiders are available in a wide range of BCDs, including 130mm, 110mm, 120mm/80mm, and 104mm/64mm. I'll be using a Force22 road crank (carbon crank with a Q factor of 146mm) as the base, and a variety of front derailleurs depending on chainring size (actuated with Campagnolo Ultra-Shift shifter, which is front derailleur agnostic).