Cranks 165mm or shorter, requires Bosch motor software update?

[averian]

Bosch has made some mention of a recent software update adjustment for shorter cranks that can be made at a dealer. Does anyone know if that's required when swapping from 170/175 cranks to 165 mm or under? Seems annoying to need a software update just for changing cranks if so...

 

[Doomanic]

You don't need it, but it is supposed to be better if you do have it.

What cranks are you going for?

 

[averian]

I'm considering a pair of a Raceface Aeffect 165 mm cranks or anything along those lines that is decently priced and looks durable for fewer pedal strikes.

Has anyone made the swap without a software update? Good/bad experience?

 

[Doomanic]

I did it with 155mm cranks and to me it seemed very odd; power was intermittent and it didn't seem as powerful either. It was better with the update. Some places will do it for free.

 

[averian]

Did the update require the dealer to change a setting in the software to specify crank length or does one just need to update to the latest firmware?

 

[Doomanic]

Just a firmware update.