Summary for Bronco owners
Feature Bilstein 5100 SeriesBilstein 6112 SeriesTarget UserDaily driver, weekend warrior, moderate off-road useSerious off-roader, overlander, higher performance needsPiston Size46mm vs 60mm off-Road Pef.Good, improvement over stock, may be harsh on big hitsExcellent, significantly better damping on aggressive terrainOn-Road Perf.Good handling, sportiness-focusedVery good, provides more control and comfort than 5100sLift Adjust.Up to 2.9" front, 2.5" rear (non-Sasquatch) with snap ringsUp to 3.4" lift with adjustable spring perches, more settingsComponentsShocks only (re-uses stock springs)Shocks and vehicle-specific springsPriceMore affordableHigher
Conclusion
The Bilstein 5100 series is an excellent upgrade over stock suspension for Bronco owners seeking improved handling and mild off-road capability on a budget. For those who regularly tackle challenging off-road trails, carry heavy loads, or demand the absolute best performance and ride quality, the Bilstein 6112 series is the superior choice, albeit at a higher cost.
Ultimately, the best option depends on your specific needs and priorities for your Bronco.