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Might be worth treating yourself to a T50 as well! ;) That old Sofrider may not be worth the hassle.

Yep. Smaller pedaling circles. I am trying 160s on my new bike that I am building, and 155's on my old Sofrider because the seat sits higher already.

You can get four bolt 104 BCD narrow wide rings all the way up to 52. So if you're OK with a Shimano mountain type crank, you're good.

But someone did do it anyway!

Very cool! I have now tested flipping the seat-mounting plate 180 degrees. It effectively moves the seat position back a bit. So there is an option to get a little more "room", and a higher bottom bracket height.

I've done that for a couple feet, by accident/necessity a few times. Soft landing is normal. Note that the landing is not really super-soft in the video either. He is bouncing a bit.

Going with a 1 by 11. I hate front derailleurs! :) Also found the 1.5 inch slider tube that fits, and 1.5 inch short stem to go on it. Just need to figure out the proper pivot clamp for the 28.6mm steerer to 38mm slider tube. I have a couple ideas for it already. Waiting on a camera (old one...

I went with the yellow based on a couple real-world photos that have been posted. It is indeed the "Vendetta" yellow. Looks really nice. A far cry from the pale yellow shown on the product page. ;) Makes me wonder if the blue is also far more luscious then the product page image? Anyway. I'll...

You could also use a stem riser to gain a few inches of height, instead of whole new slider. https://www.amazon.com/Handlebar-FOMTOR-Bicycle-Extender-Mountain/dp/B075FL6JXP

Hi Craig, Thanks for info there. I'm working on on Emeljay mod idea, but with a 38 mm slider that goes over the lower T50 boom. So a 1 1/8 stem clamp and 38mm (1.5 inch) clamp is where I'm headed. I've got one halfway fashioned already using 1.5 inch rollbar light clamps. But thought I would...

I am curious what the OD of the boom slider is, and if the pivot clamp can be purchased separately?

Chains are basically a whole bunch of bushing-bearings (chain pins) all interconnected. I suppose there could be one of these with bushing bearings instead of roller bearings. How long does your chain last? So far drive shafts are simple and durable, but not efficient. I wonder if it needs...

Looks all there to me. :) Suspended and unsuspended bikes. Gearbox for frame mount or hub/crank-gearbox. 7 or 12 speeds. Much more refined designs now. My only concern is having the cranks so low. I'm used to having them at seat height, or a bit higher.

Do you have a current asking price, or shall we just bid based on based on your original cost?

Here is a video just about it.

They have done more than that. By having the "gear teeth" be bearings, it is probably slicker than well designed involute gears (like in your car). The "tooth" rolls with the passing cog-notch in this case.

That is super cool, but I think you lose a great deal of efficiency just changing angle in power transfer like that. This transfers power at 90 degrees, while a chain is straight. But I want one anyway if they make them! And UCI was concerned about spinning disc rotors! ;)

All Cruzbikes use 1 1/8 headsets don't they? So you could totally mix-and-match. Gluing clamping a long stem in the end of the tube should as stiff as the slider tube junction if done properly. I was going to stiffen that up to by extending the slider tube towards the bottom bracket as far as...

Hi Mark, The first tube I got off Amazon was so close, but ended up binding. I had to order one from a metal supply place. Hopefully it'll work this time. It'll actually end up with an OD of 38.1. I have some clamps on the way too. Anyway. I'll be able to prototype on my old Sofrider. It has...

It looks like it would be relatively trivial to set it to negative steering angle with that setup, and a little redesign too! :)