I'm considering buying a TT bike that has a full SRAM Red group. I'm wondering if it's possible to use my Shimano Ultegra 6700 left-side crank in place of the SRAM Red crank.
Why? I've got a Stages power meter in the Shimano crank that I use on my regular road bike. One of the main reasons I went with the Stages meter was the flexibility of swapping the crank across multiple bikes. So, naturally I'd like to use my power meter on the TT bike by just swapping it.
I'd appreciate anyone's thoughts on using the two systems together!
EDIT/UPDATE: I ended up buying the TT bike. As the answer below says the SRAM crankset is not compatible with the Ultegra crank. So, I bought a used Ultegra crankset and put that on in place of the SRAM one. There was a spacer on the left side of the bottom bracket that had to be removed in order to get the Ultegra crankset to fit. I just tapped the bearing out, removed the little sleeve and tapped the bearing back in, took about 10 minutes total.
The new hybrid SRAM-Shimano drivetrain functions perfectly, I even swapped out the big ring from the SRAM set for the Ultegra one (SRAM ring is a 55 which I like having on the TT bike). It looks a bit wonky with the mismatched crank/ring combo but everything works fine!