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Amazon.com : Speedbox 1.3 Tuning Chip for Shimano EP8/EP800 Ebikes (+ETP Version) - Custom Max Speed - Real Speed/Distance Display - Smart Tuning chip, Speed Unlock for Shimano eBike – eBike Speed
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SpeedBox 1.0 Shimano– ebike Speed Unlock Tuning for Shimano E6000 Motor : Amazon.co.uk: Sports & Outdoors
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