darksiderising

Saw this and thought I'd post it up.

https://fixedgeargallery.com/2008/nov/2/KayGarbrecht.htm

It's a left-hand drive train with a disc brake as well. They used a front hub with a rear axle in order to fit the cog, spacers, and disc rotor on.

europa

Why? **scratches head**

Amoxicillin

why not?

stryper

pretty cool idea for how to create a fixed gear, but I would be worried about strength since that isn't what the hub was designed for.

ilikebikes

I dont know, the hub was designed for use with disc brakes, Im sure you know the pressure involved in that.

brandonspeck

I think I might have seen that setup. Was this on FGG?
And there are a lot of people who put cogs on a disc hub and they work fine.

I think it's cool. a great all weather commuter!

Steev

Nevermind

1fluffhead

All cool points gained for accomplishing this set up to work is negated by the tuggnut.

mihlbach

Neat setup. The cog itself is fine, since is placed right next to the hub. Lots of people, including myself, are running front disc hubs with bolt-on cogs with no problems. Disc brakes can exert a lot more torque than a drivetrain and what concerns me most here is the distance between the rotor mount and the rotor itself. Disc brakes are not designed for the rotor to be positioned that far from the hub with the cog and all those spacers in between. Those extra-long bolts could shear off during hard braking.

Its a neat idea however, and someone could undoubtedly engineer a hub-cog-brake system similar to this, but actually designed around these parameters. It will eventually happen, maybe not necessarily exactly like this but something along the same lines. You could even do a flip flop disc/disc hub with cog and rotor mounted on both sides. That would allow you to leave the DT on the right and the brake on the left, but still be able to flip your wheel around. Undoubtedly FG drivetrains are going to evolve in this direction over the next few years, at least for off road applications. The bolt on system just makes so much more sense.

ianjk

it just needs some right side radial lacing

ilikebikes

The funny thing is 99% of FG riders claim a rear brake is for "posers"

ianjk

Guess I must be a 1%er

mihlbach

I think you got that backwards. No one thinks people with brakes are posers. Having brakes is the opposite of posing.

Jabba Degrassi

Yeah, usually they're telling us to "go ried a raod biek if u want 2 use breaks so bad," except with more spelling mistakes.

tashi

That's wild, one of those "I wonder if I can..." thoughts fully realized. I've seen two chain setups as well, with one chain on each side of a single speed set-up. Weird, pointless, but probably entertaining for the guy to build and every time a bystander does a double-take.

My concern would be contaminating the rotor with chain lube, which could result in pretty loud and compromised braking. I guess this could be avoided if you used wax or something similar, and it's not like you have to lube a SS/FG chain very often so that wouldn't be the hassle it is on a geared mountain bike.

ianjk

I wouldn't be too worried. If it works with the sprocket as part of the brake on a motorcycle, it should be fine running next to a chain on a bike.

mconlonx

I was thinking the same thing as the guy you are replying to, and thought of this exact example as a reason why NOT to do it. Unless these people don't lube their chains, i.e. the bike is a stationary object or artpiece, I can't see how brake contamination would not be an issue. I have not heard of first hand accounts from motorcyclists running this setup--have you?

darksiderising

A lot of motorcycles have a left-hand drive and brake setup. They usually also only have one side holding the rear wheel on, much like a Cannondale "Lefty" fork. Hence the need for running both the brake and drive mechanism on the same side.

droobieinop

whoa!!! now thats a crazy looking, sleeper set up

*makes notes for future build*

mconlonx

Most motorcycles do NOT have a single sided swingarm. Most have a traditional swingarm with support on both sides and run the sprocket and disk on different sides... kinda like most disk brake bikes. Those motorcycles that do have a single sided swingarm, run the brake on the inside, between the swingarm and the wheel, with the sprocket on the outside of the swingarm. With such a setup, there's a good few inches between the two, not a few mm as pictured here. And even on those with single sided swingarm setups, the sprocket is usually much bigger than the disk.

I'd just worry about possible lube fling with the rotor so close to the cog and of greater diameter, i.e. in the lube fling path.

But whatever. If doodrancher is running the lefty disk/cog setup without issue, hats off to them for pulling it off.

darksiderising

Which is why I said, "a lot."

rudetay

Super predictable track skids?

wearyourtruth

all that work and he puts his tires on backwards...

robcycle

Pretty sweet. I hope he used a tandem crank.

-Rob.

gman26

where do you get a fatty tire like that?