Performance off-road racing shocks, like those available from King, Fox, and Bilstein, are designed to be easily rebuilt and custom tuned. Our Shock Valving Guide and Shock Tuning Guide explain how shock valving works and how shims are used to adjust compression and rebound damping.
|Crawlpedia Shock Shootout||A detailed review of every major brand of performance off-road shocks.|
|ORI STX Struts Guide||A complete guide to ORI STX Struts including setup and tuning instructions.|
|Shock Measurement Guide||How to properly measure for a new set of shocks, coilovers, or struts.|
|Coilover Install and Setup Guide||A detailed guide that covers how to install and setup a new set of coilovers.|
|Coilover Spring Rate Corrections||If your coilover spring rates are off, this guide will show you how to fix them.|
|Performance Shock Valving Guide||A thorough explanation of how shocks and their internal components work.|
|Performance Shock Tuning Guide||Detailed instructions on how performance off-road racing shocks are tuned.|
|Shim Stack Valving Examples||Seven sample compression and rebound shim stacks from light to firm.|
|Race Shock Rebuild Instructions||How to service and rebuild King Off-Road Racing shock absorbers.|
|Coilover Spring Rate Calculator||Find the proper coilover spring rates for your vehicle with this calculator.|
|Hydraulic Bump Stop Guide||Everything you need to know about hydraulic bump stops and jounce shocks.|
|Shock Oil Volume Calculator||Estimate the amount of shock oil you need to refill your performance shocks.|
Ring and pinion gears and differentials are some of the most commonly modified and upgraded parts of any off-road vehicle and they also tend to be the most confusing. These articles are written to help you identify your axles, select the right new parts, and install them correctly.
|Differential Locker Comparison||A detailed comparison of selectable lockers, Detroit lockers, and spools.|
|Ring and Pinion Set Up Specs||Pinion preload, ring gear backlash, and torque specs for all popular axles.|
|Thick Gears and Carrier Breaks||Select the correct ring and pinion gear types to fit your axle and differential.|
|New Gear Ratio Calculator||Find the proper ring and pinion gears you need to match your larger tires.|
|3.55 and 4.10 Gear Variations||Learn about the variations found in 3.55 and 4.10 ring and pinion gears?|
|U-Joints and CV Shafts||All you need to know about universal joints for axles and driveshafts.|
|Dana 60 BOM Code List||Find your Dana 60 axle details by looking up the bill of materials number.|
|GM RPO Axle Code List||Find the gear ratio in your GM axle by looking up the RPO code.|
Wheels are one of the most popular upgrades for any vehicle and our Bolt Pattern Guide and Wheel Measurement Guide are designed to help you find your vehicle's bolt pattern and determine the appropriate wheel size, backspacing, center bore diameter, and lug nut type.
|Wheel Bolt Pattern Guide||All you need to know about wheel bolt patterns and lug nuts on one page.|
|Wheel Measurement Guide||A quick overview of wheel sizing, backspacing, offset, and center bore.|
|Wheel Lug Nut Guide||Lug nuts come in many different shapes, sizes, and styles.|
|Wheel Backspacing Guide||Wheel backspacing and offset are critical when buying new wheels.|
Our Off-Road CAD Library is a growing collection of visitor submitted automotive CAD drawings and files that include everything from basic tabs, brackets and artwork, to beadlock rings and wheel centers, to engine, transmission, and transfer case adapters, and even tools and jigs. The collection is completely free to download and is available in both DXF and DWG formats.
|Free CAD File Library||A growing collection of visitor submitted automotive CAD files.|
|Other CAD Resources||Links to other sites and internet forums related to CAD files.|
These are the five most commonly used tire and drivetrain calculators on the internet and we've polished them up, gave them an easier to use format, and added charts and tables to make them as helpful as possible. Plus, we even put them all on one page for easy cross referencing!
|Metric To Inch Tire Size Converter||Convert hard to visualize metric tire sizes into inches and vice-versa.|
|Ring and Pinion Ratio Calculator||Find the gear ratio of your ring and pinion by entering their tooth count.|
|Drivetrain Crawl Ratio Calculator||Calculate your final overall drivetrain crawl ratio with this calculator.|
|Actual Vehicle Speed Calculator||Adjust for larger tires or new gears with this MPH offset calculator.|
|Engine RPM Speed Calculator||Calculate your highway RPM with oversize tires and aftermarket gears.|
|All Calculators on One Page||All of our calculators on one page for simplified cross-referencing.|
Crawlpedia is proudly supported by Filthy Motorsports, a specialty off-road racing and 4x4 parts shop in Boulder, Colorado.
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To find the street legal laws for your state including maximum suspension lift heights and tire size rules visit LiftLaws.com