Quarq's power meter cranks continue to be reliable accurate and easy to use. The Dfour91 model accepts Shimano Dura Ace 9100 road chainrings and offers more data transfer and frame fit compatibility.
Designed to only fit Dura Ace 9100 chainrings
Measures power for both legs with +/_ 1.5% accuracy
Dual Bluetooth lowenergy and ANT+ wireless data transfer
AxCad system provides no-magnet cadence data
Free firmware updates with the QALVIN APP
Uses a CR2032 battery that can be replaced without tools
Swap chainrings without needing to recalibrate
| Color | Black |
| Defined Color | Black |
| Crank Length (mm) | 165 |
| Spindle Interface Type | 386 EVO |
| Spindle Interface Type | BB30/PF30 |
| Crank Intended Use | Road |
| Pedal Spindle | 9/16" |
| Rings | Sold Separately |
| BB Included | No |
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SHIPPING
- Most items from our online catalog ship free on orders $25+
- Heavier/Larger items that are excluded from our free shipping have a flat rate shipping
- Expedited shipping is availble. If available in your area, this will be an option at checkout
- Complete bicycles ship with a flat rate of $75. E-bikes may incur more costs due to weight/size/battery configurations
- See the delivery FAQs for details on shipping methods, costs and delivery times
- Local pickup is available on all items at our retail stores. Please note will-call orders are available within 1-2 business day from purchase. You will receive an email stating your order has been fulfilled once it is ready.
RETURNS AND EXCHANGES
- Used items, demo bikes, and closeout items are excluded from this policy
- You may return your purchase within 45 days of purchase
- Complete bikes (including youth bikes) are not eligible for return
- All returns must be unopened in new condition upon return. We do not accept returns on open items as we cannot resell them
- Buyer pays return shipping, unless a mistake was made on the order (i.e. wrong item shipped)
- Free Exchanges towards any item in our store
