I'm looking to get a double and bash set up using Truvativ Holzfeller cranks. However I'm not too sure about the BB type. I know the product description says howitzer interface but this to me seems like a separate axle with an external BB similar to Hollowtech II. It also "looks" to be work with an internal ISIS BB, is this the case? Does anyone know which systems work with Holzfeller cranks at all? Cheers!

truvativ gigapipe

Cheers 🙂

Looking at the BB on CRC there are different lengths. I know I need a 68mm for my BB shell but what about the length. How do I know which one I need to get?

http://www.chainreactioncycles.com/Models.aspx?ModelID=33917