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Tandem bicycles

I see that you are planning on adding an option for tandem bicycles. Do you have an idea of when that will come out?

Tandem bikes

I feel bad that I told some people at last years NAHBS show that I hoped to have a tandem version done by this year's NAHBS. Well, it's the eve of NAHBS 2012 and I've been too busy with other tasks to start work on the tandem option. All I'll say for now is that it's definitely moving up in the queue.

Yes to tandem!

Please, bring the tandem option on bikeCAD!
:-)

Another "yes please"... *goes

Another "yes please"... *goes back to twiddling thumbs*

I'm another person who is

I'm another person who is looking forward to this.

I'm going to bump this thread

I'm going to bump this thread and say I have been playing with the old TandemCAD and the Pro 10.0 version and I can get different numbers out of the 'same' model.

If I select BB drop, HTA, fork, etc to all be the same I get different mitre - mitre lengths for the tubes.  Not much, but still a mm or 2...

Comparing tandems with singles

If you are using the old TandemCAD, then you are modeling a tandem. If you are using version 10 of BikeCAD, then you are modeling a single diamond frame bike. So they are obviously not going to be the same model. However, I trust what you have done is modeled the front end of the tandem and done your best to match up the specs on that with the front end of your single bike. You claim that you have chosen the same BB drop, head angle and fork. If you are seeing a discrepancy in miter lengths, my assumption is that you have still failed to match at least one critical dimension beyond the few dimensions you've already checked. Remember, all the following numbers would also have to match if you want the down tube to be the same on both models: front center, BB shell diameter, lower stack height, fork length and rake, down tube and head tube diameters, extension of head tube below bottom edge of down tube, down tube offset at BB.

Tandems

I'm pleased to report that it is now an option to model a tandem bicycle in BikeCAD version 11.

Hi Brent, thanks so much for

Hi Brent, thanks so much for the Tandem option in version11 !!   I can't wait to give it a workout. I've just sent out a quote on a tandem and was pleased to be able to add my first draft tandem BikeCAD design with it. 

It was great to have crossed paths with you in Australia all those years ago. You're a good bloke!

 

I have to say this is a great

I have to say this is a great upgrade!

Thanks for the feedback

Thanks for the kind words everyone.

Ewen, working with you in Australia is where the seed got planted for BikeCAD. I have fond memories of that time and am still proud to say that I once rode on the back of a mountain tandem piloted by an Australian downhill champion.

Additions

A couple of things I'd like added nw the tandem feature is here:

UCI rules section updated so front BB is used for bar position checking
Gap between top and down tube be able to give gap between top and extra tube, and extra tube and down tube

 

Not a tandem feature specifically, but a way to make the rider 'fatter' or skinnier, or other limb sizes to look at thigh/gut interferance issues

Feedback

Thanks for the feedback. I will investigate all that in a future update.

As for changing the fatness or skinniness of the rider, you can already do that. In the Rider anatomy tab, changing AD, KD, ED and PD will all change the appearance of the rider.

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