Return of the Bacon Slicer

[zack28]

@Piece Maker

that looks awesome… Shame I don’t speak that language so have no idea what he’s actually made that out of

I’m sure Eric will happily translate all the technical mumbo-jumbo for you… propably doing that right now:D

[ldlux]

@Piece Maker

that looks awesome… Shame I don’t speak that language so have no idea what he’s actually made that out of

I plugged it into google translate. The guy fabbed his own planetary hub. The ratio was chosen to match a schlumpfed 36er using a 28x1 wheel.

[LanceB]

I don’t understand it either, but it sure looks cool! A 2.6:1 hub on a 28" wheel comes out to a 72.8 equivalent wheel diameter. I like the way he freemounts it and rides off – that must be a pretty good feat right there. I wonder how fast he’s going on that straightaway?

[Shmolagin]

From the way the wheel moves when he mounts it either that hub has a lot of slop or it freewheels. Either way it looks scary to ride but also quite awesome.

[Eric_aus_Chemnitz]

@zack28

I’m sure Eric will happily translate all the technical mumbo-jumbo for you… propably doing that right now:D

OK. Let’s give it a try …

'Morning …
I thought I’ll present my own developement here at the forum too.

Since a while, alongside my university studies (mechanical engineering) I’ve designed a hub. Now it’s been ready for a few weeks. My goal was, to design a geared hub with a higher ratio to reach 36"-Schlumpf-like speeds on a smaller, thinner tire. The expected advance would be considerably less wind resistance. The gear ratio of the hub is now 1:2.6. With the 28x1" tire on it it has still even a bigger ratio as my Schlumpf (33km/h (20.5mph) at 100er cadence). The gear-wheels are standard gear-wheels with hardened toothing that I ordered online and were able to modify (turning narrower and drilling a bigger hole). I was able to produce most of the other parts on a conventional turning lathe (with high effort). The planet carrier had to be milled on a cnc milling machine. That shold be enough on the construction and manufacturing …

It’s hard to get the wheel rolling and small u-turns need much practice. Once rolling it rides very well (which means everything under 20km/h (12.5mph) rides really crappy). The wheel stablilizes really good, you hardly feel any wobbling (better than expected). Unfortunately the wheel is very prone to side winds so that you start to row with you arms intensivley everytime there comes a flaw. Until now I appraise it’s a bit faster than my 36er Schlumpf but for this you’ll need absolute laboratory conditions: no winds, no cambered roads, no extreme ascending slopes. It’s an albolutely specialized unicycle …
I haven’t found the time to properly compare it to my 36er yet. Spedometer is still missing …

https://www.youtube.com/watch?v=wZkK...ature=youtu.be

I’m still thinking on installing and testing a wider tire to minimize it’s prone side winds. Any suggestions on how to improve wind stability?

Hope this helps …

[LanceB]

Great info, Eric, thanks mucho.
(but the youtube link is broken.)

[Piece_Maker]

The youtube link worked for me, thanks for the info!

I agree that it looks fairly ‘specialised’ - It’s a shame it’s not shiftable, then it’d be epic

Maybe for the Unlimited races at Unicon?

[Eric_aus_Chemnitz]

@LanceB

Great info, Eric, thanks mucho.
(but the youtube link is broken.)

It’s the video I posted before. Didn’t know that it will automaticly make a link out of the http://xyz text in the quote

[Superbant]

Thought that you might find it interesting to learn that bike companies are starting to say that bigger tires are faster, at least in the world of cyclocross, where they run 33mm tires.

Here’s a list of some popular 'cross tires:
http://cyclophiliac.com/best-clincher-cyclocross-tires-guide/

[unicycleharry]

What carbon post did you use?

[mowcius]

It’s probably not possible to buy it now after 7 years…

Thomson posts with KH post tops are/were popular choices though.

Qu-Ax also makes/made a Carbon QX series post.

[Zivit]

Hi, if somebody agries, that my ultralight but durable and comfortable saddle kit will be looks wonderfully on such road unicycles, let me know. I can make it especially for you, using brand new parts and quality natural leather.
Saddle + seatpost + handlebar + ring bell, less then 1kg.

[Zivit]

Hi. This is new modification inside my conception “one frame, different wheels”
Effective diameter 66 cm, (26"), tire 622-23mm
4,4 kg, although there are not most light crancs, hub and frame.
The best property for me, how easy it is, cleaning such thin and slick tire after dirty roads.