Here we have a set of THM M5 Cranks with an SRM on them. The total weight was only 698g, which is only about 110g more than the cranks would weigh with out the SRM. These are a bit heavier than average also because they are 175mm cranks and they use a BBright, which are heaver than the standard english bb cups that the cranks come with. The reduced weight does not come cheap though, the cranks retail for $850 and the SRM power meter, which has to be shipped to the US from Germany, goes for $2695. The total will be around $3600 with the bottom bracket, but hey, how good does that crank look?
The spider is also a bit funky on the SRM with a 110bcd outer ring and a 130bcd inner, which limits your chain ring options a bit.