There is both an upper and lower pulley

- Clamp size: 31

- Pad type: steel-backed organic

If you use a crank that has less than 13 mm of threading

Polar H9 fulfills all your needs and more

srm origin carbon power meter Chainrings:53/39 SRM Origin +€100 There is both an upperDelivery in 10 15 business days (EU) Finance available at checkout via humm by flexifi. Please let us know with a checkout note whether you wish to have the rechargeable version or the battery version. SRM Origin Carbon Power MeterThe SRM Origin PowerMeter, named for having all components designed by SRM the original PowerMeter, is our first modular concept PowerMeter offering limitless compatibility. Interchangeable spindles, adjustable crank arm