72V 100A 60Ah 4.3kWh 10s24p 200lbs.....

[miked826]

OK now I wanna tease ya just a smidgen lowls. This is a outstanding machine not complaining. If you was my neighborer I would volunteer to be the test driver!!

I will raise you one. Once I went over to large Marge Rims. The down hill stunt rims at 3 inch wide. Then got 24x3.0 tires on them.

Quote. regardless of the mechanical suspension, with 12 or 14 PSI of air in the tires has much the same effect.

You don't have 7 inches of suspension travel and run 14 to 20 psi!! Down side to my wheels tire changing is a chore that approaches on learning a new skill lol. Won't lie that part just sucks. Up side those beads will never slip on a Large Marge like this one.

Have to agree with you tho. There is nothing more plush to grab pavement and such with then a bigger tire. Road bike pencle size tires would be very bumpy. I draw the line at 2.7 size tires now just don't like the stiff ride and handling in a smaller tire any time I can help it.

For the record the hard tail bike I had that put the hurts to me was like 1.9 or so size tire max. Done with that'un forever!

Here is my bike with what I was using for road tires on it. Could bend a corner pretty good. These were 24x2.7 tires. http://motorbicycling.com/picture.php?albumid=840&pictureid=4334 Sorry old picture. One day I will figgure a simple way to use my picture phone?

When did I ever say 7" equivalent suspension? I've never had 7" of suspension in my life on ANY bike I've ever owned? Who can afford that? Not me. I could only ever afford 100mm. LOL

My tires are also, speed rated at 93 MPH, max combined load rating is 988 lbs and each motorcycle tire is more than 3X cheaper than a Surly tire. It's not even fair to compare those 2 tire types, even though that bicycle tire is the closest tire that you could use for a comparison.

 

[Goat Herder]

Ok mebbe I lost you there for a bit. I basically say why not have 7'' of sus plus 100mm and go 80mph. Those knobbies might scrub a little no? I don't know how stiff your tire is?

I do like the tires tho as they seem to be bullet proof.

 

[miked826]

Ok mebbe I lost you there for a bit. I basically say why not have 7'' of sus plus 100mm and go 80mph. Those knobbies might scrub a little no? I don't know how stiff your tire is?

I do like the tires tho as they seem to be bullet proof.

Those tires weigh 10 lbs each and I can put 200 lbs of weight on one, with no rim or inner-tube inside it and it stays upright without it's sidewalls collapsing. I couldn't believe it. LOL

No doubt about it. As soon as I get the $$$, those current forks are gonna be replaced. I think I can make do for now with them though. I'm gonna need a wider fork to go suspension because the front hub is just too wide.

 

[miked826]

I need forks with a minimum of 6" between the fork legs. I have no idea what size motorcycle that translates to.

As far as having an actual functioning, pedaling, bicycle with swing arm rear suspension AND those ammo cans filled up with batteries is concerned would require something even more radical than the frame I have now. Is it impossible to build? No, but it sure as h3ll ain't gonna be easy (with my hand tools). Cause they suck. LOL

 

[miked826]

Ride the 2 Wheeled Suspension-less Octopus. If you dare! LOL

 

[biknut]

I think Harley just copied your idea.

 

[miked826]

I think Harley just copied your idea.

Yeah I heard about that today. They still have to keep that brute on the streets though because it has no pedals. I have no such limitations.

My last name is actually Davidson, as in Arthur Davidson of Harley-Davidson. Go figure. LOL

 

[Theon]

Your lower back is obviously better than mine, but it is fun going hard on a hard tail,
My concern, and I do like your idea, but is the single lower tube section between seat post and chain stays. It will be taking a lot of heavy shock loading. I appreciate that you have used heavy tube, and I know that my opinion is my own, but having studied engineering, and given the combined weight of you, batteries and motor. With out a triangulated section in the rear and or the use of shocks, which will need a triangulated section for shock mounts,
the potential torque of that motor alone with hard take off's in my opinion has chance of twisting the rack tube where it is welded to the seat post?
I hope this comes as constructive criticism.
Because otherwise I love it! Electric torque is awesome! Hang on brother!

 

[miked826]

Don't look now. Electric motorcycles are coming out of the woodwork like stuffed termites. LOL

Makes me wanna just lose the pedals altogether and build a softail electric motorcycle. It sure as shiite would be a lot easier to build without those dang pedals.

This one is from the Netherlands.

 

[miked826]

Your lower back is obviously better than mine, but it is fun going hard on a hard tail,
My concern, and I do like your idea, but is the single lower tube section between seat post and chain stays. It will be taking a lot of heavy shock loading. I appreciate that you have used heavy tube, and I know that my opinion is my own, but having studied engineering, and given the combined weight of you, batteries and motor. With out a triangulated section in the rear and or the use of shocks, which will need a triangulated section for shock mounts,
the potential torque of that motor alone with hard take off's in my opinion has chance of twisting the rack tube where it is welded to the seat post?
I hope this comes as constructive criticism.
Because otherwise I love it! Electric torque is awesome! Hang on brother!

Yep, there's a whole lotta, "what if", "it may", "it could possibly", but there has never actually been one comparison done of a box frame vs a triangle frame..........ever. Who would be stupid enough to make a box frame in the first place to make such an in depth comparison? There's never before been a logical reason to purpose-build such a frame. Please show me a link to that comparison, that I already know does not exist.

 

[miked826]

Your lower back is obviously better than mine, but it is fun going hard on a hard tail,
My concern, and I do like your idea, but is the single lower tube section between seat post and chain stays. It will be taking a lot of heavy shock loading. I appreciate that you have used heavy tube, and I know that my opinion is my own, but having studied engineering, and given the combined weight of you, batteries and motor. With out a triangulated section in the rear and or the use of shocks, which will need a triangulated section for shock mounts,
the potential torque of that motor alone with hard take off's in my opinion has chance of twisting the rack tube where it is welded to the seat post?
I hope this comes as constructive criticism.
Because otherwise I love it! Electric torque is awesome! Hang on brother!

Look at what these trained engineers, worldwide, engineered........and got wrong, really really wrong. I'm just sayin'. LOL

http://listverse.com/2007/12/04/top-10-worst-engineering-disasters/

http://en.wikipedia.org/wiki/Category:Engineering_failures

 

[cannonball2]

This agrees with what I posted earlier. There is a weakness in the rear lower section due to lack of triangulation. A strut from the lower section to the seat post would probably handle the loading. At the very least drive a section of tight fitting thick wall tubing into the lower section and weld the end. Not trying to be critical on only helpful. Hate to see this killer build have an issue at the speeds you are expecting. And even worse you getting hurt!

 

[biknut]

I'm thinking if that lower tube flexes a little that's a good thing. It might bend, but it probably won't cause a catastrophic failure. Worst case if you hit a big pot hole your bottom bracket will just end up dragging the ground.

 

[miked826]

I'm thinking if that lower tube flexes a little that's a good thing. It might bend, but it probably won't cause a catastrophic failure. Worst case if you hit a big pot hole your bottom bracket will just end up dragging the ground.

You know I forgot all about, "I'm thinking" from my list. Thanks for reminding me.

I'm thinking I could also go through an intersection and get T-Boned by a city bus driver texting on his phone. I'm not sure if my bike could survive that "what if" scenario either.

 

[miked826]

This agrees with what I posted earlier. There is a weakness in the rear lower section due to lack of triangulation. A strut from the lower section to the seat post would probably handle the loading. At the very least drive a section of tight fitting thick wall tubing into the lower section and weld the end. Not trying to be critical on only helpful. Hate to see this killer build have an issue at the speeds you are expecting. And even worse you getting hurt!

Actually the bike frame has already been certified "Road Ready". It has yet to fail a single load or stress test that's been placed on it, despite the "what if's" and the, "not trying to be critical's". Why would I go through all this bike building and then not even test it out prior? LOL

And despite what everyone has told you, Me and Pain are not distantly related or even friends, and never have been.

 

[biknut]

I'm actually a big fan of trial and error engineering. I'm not smart enough to do it any other way lol.

 

[miked826]

I'm actually a big fan of trial and error engineering. I'm not smart enough to do it any other way lol.

You will absolutely love these engineering marvels then! They make even me look like a genius. LOL

http://listverse.com/2007/12/04/top-10-worst-engineering-disasters/

http://en.wikipedia.org/wiki/Category:Engineering_failures

 

[miked826]

"Engineers" at Boeing engineered a B-52 bomber that split in half, mid-flight, in 1961 and dumped it's 3.8 megaton load of nuclear bombs on North Carolina. The bombs mechanically malfunctioned, saving North and South Carolina from nuclear annihilation. Trial and Error Engineering, thermonuclear style. LOL

http://www.cnn.com/2014/06/12/us/north-carolina-nuclear-bomb-drop/

 

[cannonball2]

Nuff said. Its and incredibly cool build and I know your gonna have a killer time blasting around on it!

 

[miked826]

Nuff said. Its and incredibly cool build and I know your gonna have a killer time blasting around on it!

Thanks much. I know it's not gonna be much fun with those front forks but I just cant put normal suspension forks on there or I already would have. The forks need to be massively wide (6" or more between the fork legs) and that's gonna cost me dearly. I'll just get by with what I got for now until I can swap them out.