I thought I'd start a thread regarding big tandems (those that are bigger than 63cm virtual or otherwise for the Captain) and also to discuss available components for Clydesdale tandem cyclists.

So let's see some pics of some BIG tandems!

Lightning now offers tandem cranks, including up to 200mm. These have a 285lb weight limit. High zoot, featherweight tandem cranks. Curious to see the $/g saved ratio on these compared to other tandem upgrades. Notable here because they now make the tandem cranks to the aforementioned 200mm size, previously they had only been making 'em to 190mm.

Lightning Tandem Cranks

Zinn/High Sierra still make their square taper tandem cranks in sizes up to 210mm, I think.

daVinci makes cranks, but although they start their range at 150mm, they stop on the long side at 180mm. Until now. daVinci is going to do a limited run of 200mm cranks. You can get Tandem-Captain's cranks, road double, road triple, whatever you want. However, regardless of what pedal threading or interchangeable spider you select, you can only get 200mm, not any custom size.

However, at $220 these are going to be a steal for custom long Captain's cranks, let alone road double/triple or mountain triple for 200mm.

If interested visit the Serotta forum thread:

daVinci 200mm Special Order Crank Thread