Endless Sphere

https://i.imgur.com/BByC42p.jpg bigger has its advantages: bigger contact patch, better on square-edged hits, etc. but also weighs more. sometimes smaller is needed to get your desired "gearing". smaller wheel particularly advantageous w/ hubmotors this bike has 17" moto rear and 26" bicycle front....

http://www.eastgem.net/d9000.html

seems to be simply a slightly longer version of the D7500 i.e. same diameter but D9000 is 170mm long, D7500 is 127mm

any thoughts?

very nice project! i need exactly that: low-range gears that could get me through super loose sand and up super steep terrain while keeping power draw low

btw i noticed your industrial chain. mine are doing well so far. i think these industrial chains have harder metallurgy than (cheap) moto chains

I've found the same conclusion. I use 180mm on rear wheel since is enough to lock up, 203 in front. Up to now my prefered brakes are the Shimano Zee. https://www.chainreactioncycles.com/shimano-zee-m640-disc-brake/rp-prod82434 , quad piston designed for downhill, amazing modulation. Those 203 rotor...

What is the best 26 inch coil fork for this bike? It seems like we are stuck getting air forks, if we want to buy new. The only coil forks are for 27.5 and 29 inch bikes. Seems like most people prefer coil if not for the weight in the biking world. Ask your self this if your sur ron fork broke tomo...

#41 running great so far...




the 220mm shock w/ 550lb spring was too soft so i purchased a 240mm w/ 650lb spring. will test it soon

i went ahead and got 4 boxes of #41 chain (10ft/bx). we'll see how fast it wears out... https://i.imgur.com/5qH3Lrr.jpg https://i.imgur.com/PzNpJK1.jpg https://i.imgur.com/R52zGES.jpg https://i.imgur.com/WmBj3sK.jpg i'm also cross-posting these side-by-side pics of these various size chains because ...

http://i.imgur.com/Fk0qecO.png i used this calculator but i ended up having an actual speed of about 50kph (or 55kph using this controller's "overspeed" mode). so use a value of about 80% in the "percentage of speed when loaded" for more realistic results. get a cheap laser tach very useful. use as...

i just got 4 boxes of #41 chain (10ft/bx). interestingly #41 uses the exact same size sprockets as #420. much lighter weight. slightly smaller pins. we'll see how fast it wears out... https://i.imgur.com/5qH3Lrr.jpg https://i.imgur.com/PzNpJK1.jpg https://i.imgur.com/R52zGES.jpg https://i.imgur.com/...

Bonneville wrote: ↑

Apr 22 2019 12:23pm

Any one knows what the kV is for a Denzel 4500 ?

probably 60?

have you decided on your chain/sprocket size? i'm using #420 btw...

https://i.imgur.com/cecYiDu.jpg i'm currently using cheap counterfeit 420 chains which don't last very long in the terrain i ride in (sandy dusty, muddy, river crossing, etc). i'm thinking of trying this KANA #41 industrial chain. #41 uses the same sprockets as #420 but has slightly smaller pins. b...

thanks skeetab! https://i.imgur.com/lrrLJS4.jpg https://i.imgur.com/PsNVopc.png just got a budget quad piston for the front only. the rear tire is already easy to lockup working great so far. i also got these 203mm rotors. thicker and heavier than shimano RT-66 that i replaced. 250g each. seems to b...

thanks chalo very helpful :roll: https://www.diyelectriccar.com/forums/showthread.php?t=15508 i found this formula: The POWER requirements of your car at a particular speed is: Power in Watts = ((Mass in kg) (9.8m/s²) (Velocity in m/s) (Rolling Resistance)) + ((0.6465) (Coefficient of Drag) (Area in...

Why the smallest motor? Why not the most dependable, most efficient, or most cost effective? You're already opting for 700kg of relatively useless pig iron, after all. If you want to use the smallest motor, figure out the power requirement at 50kph and use an RC airplane motor that delivers that mu...

660cc engine (to be removed)

700kg (ish) curb weight

i just need it to cruise at 50kph on flat roads. what's the smallest motor that could do this? a golden motor 5000w watercooled would do it?

yeah it climbs pretty much everything around here. btw i'm also planning on using a smaller motor sprocket to sacrifice top speed for more torque. since you ordered a Kelly just start conservatively then start upping the amps if you see that the motor isn't getting hot as for the cells since you'll ...

https://secondlifestorage.com/repackr.php this tool should help you group your cells to have the least capacity differences across parallel groups denzel d4500 is a 5kg motor, in the same class as my BHT. i got a thermal sensor directly on the windings and i'm getting up to 90C in difficult terrain....

ETxw6cO6-k8 this guy put two small motors, kinda like the BHT i'm using or probably slightly bigger, on a single shaft to drive the "world's cheapest car" (600-ish kg curb weight WITH engine which he removed) would probably overheat the motors, right? also aren't there synchronization or load shari...

i wonder if this is any good

https://www.aliexpress.com/item/KUNRAY- ... 45800.html

trazor and madin888, it was a race but nothing serious, was just for fun. slow twisty track so i didn't even put on all my gear, coz i'm not an all-the-gear all-the-time person :lol: but thanks for the links trazor! when out trail riding i put on elbow, knee/shin, gloves, and hiking boots. PS here's...

if you use by rated power my motor give to you zero problem ;) my new motor builded in unitemotor factory and cant say is bad quality nothing to do w/ rated power. the yellow phase wire wasn't properly tied in so it ended up touching the rotor. a quality control issue anyway i just got back from an...

https://i.imgur.com/jm4nAvT.jpg still need to tidy up the wiring. then add yellow and red graphics to the battery box to match the color scheme of the fork. etc https://i.imgur.com/hiwZmcM.jpg then i found this lightweight 17" rim. so together w/ 12-gauge spokes should reduce weight as well as be a...

madin88 wrote: ↑

Mar 18 2019 8:35am

Did you paint the frame or is it powdercoat? Looks nice

rattle can