Speedbox 3.1 B.Tuning Kit for Specialized eBikes

With this premium bluetooth ebike tuning chip, control your eBike’s speed, monitor your rides, and adjust settings effortlessly through the easy-to-use Speedbox app. Experience eBike tuning at its finest, with a simple plug & ride installation directly to the TCU. Read our full review here Works with all Specialized brand eBikes with a Mastermind or LED TCU (excludes Gen4 Levo) Please note, it will only fit ebikes with TCUs on the top tube (see image) ✅ Removes factory speed limit completely ✅ Plug & ride — no specialist tools ✅ Stealth install, completely hidden ✅ Accurate speed & distance ✅ Lifetime warranty included ⚠️ For off-road use only. Not legal on public roads. Read full legal disclaimer.