Shimano PearTune Tuning Chip to Derestrict SH1 Steps for Di2 E8000 E7000 | eBay
Shimano STePS E Bike Tuning Overview– E-Bike Tuning
Amazon.com: Customer reviews: SPEEDBOX for Shimano Steps E8000, E7000, E6100 & E5000 | Electric Bike Tuning Chip | Remove Speed Limit for Mid Drive eBike Motor