SpeedFun 3.1 for Specialized (Turbo Levo gen4)
The SpeedFun Furious Ultra is an e-bike tuning device for Specialized 3.1 motors (Turbo Levo Gen4) that removes the 25 km/h speed limit.
- The description claims that the tuning device electronically manipulates the rotational speed of the rear wheel.
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Good foundation, but some important product data is still missing.
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