FatBoy Mini Drive Train 1:3

directdrive
trampa
geardrive
drivetrain

#1

Hi guys, as many people were asking about smaller wheels like (125mm) for direct drive, after spending some time on the design we finally have something to offer.

Some initial specs:

  • ~90mm diameter of case
  • 3:1 gear ratio
  • Outer gear style
  • Motor gear in aluminium 7075 T6 coated with a hard surface or something similar don’t know the name.
  • Wheel gear machined from POM plastic.
  • Should fit mini hanger from Trampa with small filing one surface.


Motors for gear drive
#2

Yess!! :star_struck:


#3

Something like this coating?


#4

I don’t know what it is as I didn’t asked, but you can see in my inner gear pictures how it’s different color, after riding not a single scratch on the surfice


#5

Sorry @Kug3lis I’ve change the title, I think gears drive and direct drive are two different system and since your system is base upon a reduction it can’t be call direct drive


#6

Then tell that to everyone who uses this title :slight_smile:


#7

Yeah it is a misconception that alots of peopke have


#8

On this forum context direct drive means, motor power is transferred directly by gears to wheel, then instead of belt or etc


#9

Dude if designed something like this I’d call it whatever I wanted


#10

You have to live in reality


#11

If you don’t like it just move forward :wink:


#15

I guess I’m just an A**hole

My point was just to name thing for what they are and not what we wish they are. And start educating people on real term, I know Jenso Call is drive “Direct Drive” but it isn’t right neither, and now when you talk about hub everyone is confuse.


#16

@JohnnyMeduse @Kug3lis
Would you two please stop your bickering and stop the flag wars
This is getting ridiculous.


#18

Dude…someone seriously flagged my post? I sometimes forget that this forum is a form of social media…thanks for the reminder


#19

Oh man. Just when I was about to spend my money elsewhere. I guess I’m back to a holding pattern for a while. Just as well my battery build is taking longer than expected.


#20

I guess everyone is emotionally unstable this weekend lol!


#21

There has been so much salt on this forum lately. Anyone gotta glass of water?


#22

guys coming from hubs want a carvon to be a direct drive… guys coming from belts and chains want a gear directly driving the wheel to be a direct drive.

And wikipedia is hardly “evidence” the page was edited a few weeks ago and not that long ago I thought I remembered reading the same page and it said something else…

maybe we all need to imagine?


#23

Im pretty sure that direct drive means direct transfer of the motor revs.
Note NO gearbox.
By that definition carvon IS a direct drive, as it is just a hubmotor…


#24

I’d say carvon is a direct drive and not a hub-motor as the motor is not the wheel hub…
and I had previously asked Jenso about why he called his gear box a direct drive and he flicked me up a page referencing his perspective… And I respect him enough to move on.

At this point we can argue semantics of drive systems or if it should be eMTB or… it don’t really matter unless you are a keyboard warrior looking for conflict (no dis-respect Dan, just making a point).