For Sale: Track Tandem

Yep, less b.b strain and more choice in cranks.

I can't work out how there is less BB strain. Makes no sense to me.

On the rear b.b with a same side drive the front chain pulls forward and the rear chain pulls backward, but on the same side, evening out the torque placed on the b.b in the horizontal plane.

On a cross over the pull in eacj direction is on opposite sides of the b.b hence puts more of a torque in the horizontal plane ( think looking from above) and hence more force onto the b.b bearings. I'm not very good at explaining it but if you draw yourself a little diagram it makes more sense.

Doesn't that mean the force would go towards the BB though in a kind of splay the BB open way?

I'm not sure what you mean.

cross over
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         ----->----
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------<----
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a twist is placed on the b.b axle putting more force on the bearings

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        |

------<---- ----->----
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reduced twist?

The front chain is slack because the bike needs a new chainring, as stated.

Dibs being stoker.

So happy you got this Ed!

not counting chickens yet. still hasn't replied to email....

oh edmundo... I do hope you love her and treat her right! I have very fond memories of this bike.

If its mine it'll have a nice cosy spot next to my touring tandem. Will get it track ready asap and bring to HH see https://www.lfgss.com/thread47272.html for why.

Hi J08, have left visitor message and email at tracktandem@gmail.com as listed in the first post. Let me know, cheers.

Sold STC - or whatever you call it - to Mr Edmundro.

win.

Sorry to be brutish here, but I've seen too many really nasty accidents where peeps have had dérailleur chains on fixed.

ftfy. Proper 3/32" single speed chains like Wippermann 7R8 don't have the same issue.

Sheldon dicusses single-side drive tandems + bb stress