I am trying to redesign a Drivetrain for our robot, since I completely screwed it up earlier in the season. Right now, it uses green motors (200 RPM) Geared up 84:36, which is simply too fast for out team, and really is too fast for any VEX V5 robot in general. I was wondering if I could get some s…

Honestly, you might just want to run 200 direct if you can’t get different cartridges or gears. For our first robot we ran 200 direct on 4 inch wheels, the only issue was that we used only 4 motors and all omni, we got pushed around quite a lot so you might want to do a traction wheel in the middle.…

Thanks for the recommendation! I ended up having a robot like that last year, and it did work okay. I might consider doing that.

[image] Catalogue of Drive Gearings Technical Discussion Due to frequent questions and discussions on drive speeds, but not a lot of resources on the layouts of the possible gearings themselves, I’ve created this resource for people to see a catalogue of drive speeds that …

Thanks! I have tried to use the resource before, but I found that none of drive gearings fit the materials that the team has or are too big to fit onto the actual frame of the chassis. It’s why I’m asking around to see if anyone else has ideas.

just drive the wheels directly with the green motors.

Honestly your current setup might be the only option for 4" wheels, if you had 3.25" wheels then 333rpm would work nicely (just under 30 holes, 36 and 60 tooth gears), but if you are absolutely desperate you can try using chain and sprockets to get a good ratio.

Kind of another thing I had in mind. I was able to CAD this drivetrain I was also thinking about. It is 250 RPM, using Green Motors geared up 60:48. Any thoughts on this one? (Sorry for the poor CAD, I don’t have much time on my hands to make them very refined.) [Screenshot 2025-12-01 8.28.56 PM] …

Its probably one of the only solutions that I may have, you’re right. The problem that I have with the drivetrain right now is that it is geared up 84:36. With green motors, that makes that drivetrain go almost 97 inches a second, so I’d have to lower the power to the motors in order for it to go a …

Something I could not get out of my head. Would it be okay to put on traction wheels in the chassis, but just have them free spinning? I thought I’d ask since I had a feeling that friction and maybe turning could become a problem, but running just Omni wheels is probably just going to get us pushed …

Running a free spinning traction wheel should be fine, just make sure you attach it well to reduce friction.

Struggling with a Drivetrain Redesign

VEX V5 General Discussion Technical Discussion

pmkv November 30, 2025, 5:05am 4