What, and ruin my dry New England wit? 
Re: : )
The extended handlebar lets you lean on the handles and support some of your weight with your arms instead of having all of your weight on the saddle. That helps to relieve crotch numbness. The handlebar setup is not necessary for shorter rides, but for longer rides it is a very nice thing to have.
It is also helpful to have one hand on either the handle out on the boom or the handle right on the front of the seat when pedaling at high RPMs. Holding one of the handles helps to keep both you and the unicycle steady as you are pedaling fast.
The computer is a regular cycle computer that measures your current speed, trip distance, average speed, max speed, total distance, ride time and other data. A magnet on the spokes triggers a sensor mounted on the fork. The computer reads the sensor and can compute how fast you are going and how far you have gone by counting how many times the wheel rolls around and keeping track of how long each wheel revolution takes.
Very nice John - Iād love to try it out someday. If you need custom shims, I recommend Rick Hunter . He can make then any size, any how.
āNathan
my coker
instead of an air seat, i spent about $20 and got a large velo gel pad, and fit it around the seat. i like the handle attatchment and the computer. excuse my asking, but what are the handles for? why wouldnt you just wave to people or cross them behind your back? for the record, i like to ride my coker in the snow!!! i can also do some one foot, seat out riding and can seat out hop it up stairs. nobody cares. nice design tho.
Re: my coker
There is more than one way to do handlebars for a Coker. Lars Clausen did a cross-country unicycle ride and he had a unique handlebar setup that went behind him and then up to his sides. You can see pictures of his setup at www.onewheel.org and on his photo archive page.
Also take a look at www.unitours.org and the photos there. For example, the photos of the Norwegian Unicycle Tour. Most everyone on the tours are using some sort of handlebar setup. Most of them are using the handlebar setup designed by Paul Wyganowski, but others are using homebrew designs.
Some sort of handlebar setup for long rides "is a good thing"ā¢.
makes sense
to take weight off your seat, I only ride a little and it gets to me now.
Ok, so on your coker whats the longest distance, and fastest youāve ever ridden???
Andrew
Re: makes sense
My rides on my new Coker have just been 10, 15, or 20 miles. Nothing really long yet. My longest Coker ride has only been about 35 miles and that was on my old stock Coker. Now that I have a nice custom Coker that is way more fun to ride than the stock Coker Iāll be doing more longer rides. Iāll be doing some longer rides on it.
I have also put some effort into improving my Coker saddle. Itās the same general design as my Roach Airseat but Iāve experimented a lot with different foam to make it more comfortable for Coker style riding. Iāve got a combination now that is comfortable. It worked well for the 20 mile ride I did. Iāll have to see how it works for longer rides. Changing to different shapes and types of foam makes a big difference in the air seat. What works well for muni doesnāt necessarily work as well for Cokering.
My max speed on my old stock Coker was 17.5 mph, but that ended in a flying UPD. 
Iāve been hitting 14 mph on my new Coker without even trying to go faster than Iām comfortable with. I donāt have a desire to go much faster than that. 14 mph feels a lot better on my new Coker than it did on my old stock Coker. The new Coker is so much more solid.
About half of the miles on my new Coker have been on the dirt. I like old dirt rail-road trails. Theyāre great trails for a Coker.
very cool : )
When you say only, 10, 15, 20, I find that funny. Seeing as how my longest ride was going back and forth in a parking lot, and getting off cause I couldnāt stand sitting that long, but I guess this comes with time and riding.
Thats cool that you havenāt had any UPDās with your new one, hopefully the one going 17.5 ( wow, thats fast ) didnāt hurt too much.
Andrew
Re: very cool : )
The 17.5 mph crash only hurt my pride. I had Rollerblade kneepads on and full finger cycling gloves. All I ended up with is a tiny bit of road rash on my forearm.
Iāve had one UPD on my new Coker where I didnāt land on my feet. The wheel slipped out from under me when I tried to turn on a slick wet boardwalk. I got a bloody pedal scrape on the shin from that crash.
What do you mean custom? I just bought a stock for $300. Was it worth it? I plan on using it to ride to skool and school (no pedestrians where I live).
Alex
My handle is custom because I made it just for me.
I call my unicycle a custom Coker because I donāt know what else to call it. Iāll have to come up with a name for it. I canāt really call it a Coker anymore since the only thing Coker on it is the tire and tube.
The stock Coker is well worth it. It works well and there is nothing else quite like the way that a Coker rides.
So far I have spent about $1000 on my custom Coker including the cost of the JC Coker Handle. All the upgrades are well worth it for me, but $1000 is a lot for a unicycle.
The downside of the stock Coker is the rim. The rim is wimpy and doesnāt make for a strong wheel. The Airfoil rim makes for a much stronger Coker wheel, but it also makes for a more expensive unicycle. The Deluxe Coker (which has the Airfoil rim) is $489 from unicycle.com. With the upgraded wheel the Deluxe Coker makes for a better unicycle. If youāre riding the Coker for performance or being rough with it then the Airfoil wheel gets to be more necessary. But lots of people have been using the stock Coker with the stock wheel and it has worked OK.
ahā¦cause he listens to Johnny Cashā¦?