Community / Workshop
Build on what we learn.
Ask a question, share a tested setup, or help another driver. Each guide has a discussion below it.
Crawl ratios, low range and portal hubs
How first gear, axle gears, transfer cases, doublers and portal hubs combine.
Read & join the discussionSpeedometer calibration after tires, gears or portals
A practical workflow for tire changes, axle swaps and off-road reductions.
Read & join the discussionHow to Read Gear Ratios
A plain-English guide to understanding what first gear, overdrive, final drive, and tire diameter really do to vehicle speed and engine RPM.
Read & join the discussionGear Ratio vs Final Drive
A practical guide to deciding whether you should change the transmission ratios, the final drive, or the tire size when a setup feels too short or too tall.
Read & join the discussionContributions are reviewed before publication. Cite your hardware and documentation; distinguish measured results from estimates. Product promotion and unsafe or misleading instructions may be removed.