Tag Info

There are bicycles with a crankshaft that runs through the rear axle. The "Tur Meccanica Bi Bici" is such a bicycle: I can't tell from your picture if it's the same bike or not, but it certainly could be.

It's hard to tell from your picture because they're out of focus, but they look a bit like grease nipples: i.e. like the ones in the top left of the picture. Do they have the little ball bearing in the middle?

I know they're not for an elliptical bracket, as there's other screws elsewhere for that Elliptical? Do you mean eccentric? Are you sure that's not what they're for? Maybe there's one set of bolts to adjust the orientation, and another to lock it in place. But there's also this on the spec sheet: LUBRICATION: "CB" twin force-feed to brackets and ...

Kool stop R9 Magura HS33 Pads are made to work with Rigida CSS rims. Also V-Brake inserts by kool stop for Rigida CSS rims.

From the photo, it is possible to notice that the lower part of the front downtube, and the lower part of the bottom bracket boom tube (the one connecting both bottom brackets) surround the eccentric at an angle quite larger than 180 degrees. The following exagerated ilustrations shows it: That means, even if both bolts brake (If one breaks, the sudden ...

First off, in order for there to be any sort of a "crisis", both bolts would have to fail, an unlikely possibility on a reasonably well-maintained bike. But, beyond that, the integrity of the frame doesn't depend on the BB shell resisting twisting loads. Rather, due to the "truss" nature of the standard bike frame (tandem or not), the load on the shell is ...

The captain's weight hardly pushes the rear wheel down at all, while the stoker's weight is almost completely on the rear wheel, so check their weight is positioned correctly. If the stoker is standing up, this can shift weight off the rear wheel, making a skid more likely. Standing up on tandems is "advanced", some would add "insanity".

This a request for clarification rather than an answer (sorry, I don't have enough rep to comment yet). First thing to assess is the threading of the right cup. I assume the BB is English threaded, because it's a CB product; if this is correct then when you unscrew the right threaded left cup, the left threaded right cup would rotate in the same direction, ...

Grease fittings are still to be found on the Big Toys, but just about everything consumer-focused is of a sealed bearing design. @heltonbiker is right... the old stuff is just forced out by the new stuff. What you've got there is the same head design for a fitting that's show in the Wikipedia article too. Your crank isn't the sealed type and probably could ...