SRM

£1620-2799

The SRM is the granddaddy of power meters, launched back in the early ’90s. It hasn’t really moved with the times – it still requires a frame magnet for cadence, there’s no independent left/right measurement and you have to send it away to get the non-rechargeable batteries swapped, though they last for 2000-3000 hours. In its favour is the fact that is handles temperature variations superbly, and you can rely on its data being accurate and consistent.