SRM Power Meter PM7 Shimano Dura Ace DA 7800 7803 170 50-34. This will be a 48hr ParcelForce service, fully insured. Requires a magnet fitting to your bike frame at the bottom bracket. The item "SRM Power Meter PM7 Shimano Dura Ace DA 7800 7803 170 50-34 Crankset Powermeter" is in sale since Monday, January 13, 2020.This item is in the category "Sporting Goods\Cycling\Bicycle Electronics\Power Meters". The seller is "kaoniikura" and is located in Exeter. This item can be shipped to United Kingdom.