RC Rollout Calculator vs RC Pit Spec

RC Rollout Calculator is the essential tool for every RC car enthusiast. Quickly calculate the perfect rollout, find the right pinion gear, and fine-tune your gear ratio — all in one app. Features: • Rollout Calculator: Select spur gear, pinion gear, and tire diameter to instantly calculate your rollout value. • Pinion Finder: Enter your desired rollout, spur gear, and tire diameter to find the matching pinion gear. • Interactive Tables: View rollout values across different spur/pinion and tire/pinion combinations at a glance. • Highlighted Selection: Your current setup is highlighted in the table so you can easily compare nearby gear combinations. • Two Table Modes: Switch between Spur/Pinion and Tire/Pinion tables to explore different setups. • Portrait & Landscape: Fully optimized for both orientations — compact pickers in portrait, side-by-side layout in landscape. • No Ads, No Subscription: A simple, focused tool that just works.

Your whole RC pit, in one app. RC Pit Spec brings your setups, lap times, AI analysis, parts, and sharing together in one place — the pit box in your pocket. Whatever you do at the track, just open the app and it's all there. And the standout: your phone becomes a lap timer. No transponder, no timing loop. Point the camera for a single car — or print the app's paper markers to time several at once. Then let AI analyze your runs and tell you what to tune next. ■ Lap timing with your phone Point the camera at your finish line and it detects each pass automatically. Print ArUco markers from the app onto plain paper, stick them on, and time multiple cars at once, scored by number. Mount it on a tripod and run pack after pack with no re-setup. Everything runs on-device — works even with no signal at the track. ■ AI causal analysis Tap "analyze" and the AI compares this run to your last session at the same track: "Toe-in up front gave you better turn-in." Cause and effect, not guesswork. Apply a suggested change in one tap, then confirm on your next run whether it actually made you faster. ■ AI pit crew chat Chat directly with a virtual veteran RC mechanic. Ask follow-ups, dig deeper, and get real coaching that respects your chassis' specific constraints. ■ Run log Record date, track, surface, temperature, installed parts, and notes. See your progress in numbers and charts — the lap-trend graph drops as you get faster. ■ Garage Manage all your cars and settings in one place, with a fast, low-typing UI built for the pit lane. ■ Parts management Track your inventory, what's installed on which car, and maintenance reminders. ■ Pit Browse, compare, and import other drivers' setups. Learn from the fast guys and share your own. ■ PDF export (every chassis) Export a setup sheet as a PDF for any chassis. TT-02, MB-01, TRF421, TA08R and other main Tamiya chassis use an official-style sheet; the rest use an item-list sheet. Print it and keep it in your pit box. ■ Supported chassis 40+ chassis across touring, off-road, drift, and Mini-Z — including Tamiya, Kyosho, YOKOMO, XRAY, Team Associated, Mugen, Infinity, Schumacher, and more. New chassis added regularly. Not in the list? Add your machine under a name you choose. ■ Pricing Free to start. Optional Basic / Pro plans for AI usage and premium features. ■ Disclaimer All product and brand names are trademarks of their respective owners. RC Pit Spec is an independent third-party tool and is not affiliated with or endorsed by any manufacturer.