QR 700c Road Racing Bike Wheel Set 8/9/10/11 Speed - Taiwan Sealed Bearings Hubs - High Strength 4D Aero-Dynamic Sleeved Rims - Tubeless Compatible - Super Lightweight 1700g

Product Code - 638962

700c (ETRTO 622x17) road wheelset
Suitable for 700c dropped handlebars road bikes with rim brakes and with a 130mm rear hub spacing (Not suitable for 700c hybrid bikes)
Precision 100% hand built wheels
Clincher / Tubeless Compatible (can be run either with standard clinchers or road tubeless tyres)
High precision technology, high strength sleeved rims in stunning sand blasted finish & CNC machined black sidewalls
30mm deep aero-dynamic rims
17mm inner rim width will comfortably take any road tyres from 700x23c to 700x38c
4D dimensional hole drilling rims ensures the spokes and nipples form a straight line as much as possible, therefore enhancing wheels performance and greatly reducing the chances of spokes breaking, even at high tension
Presta FV valve holes
High quality Taiwan sealed bearings hubs (High strength and very smooth hubs)
Rear hub 10x130mm QR / Front hub 9x100mm QR
7-11 speed HG cassette compatible rear hub (Spacer is supplied for use with 8/9/10 speed cassettes.
20 stainless steel spoke front wheel & 24 stainless steel spoke rear wheel (rear wheel is built in a 2:1 Two-to-One spoke ratio, 16 spokes on the drive side & 8 spokes on the non-drive side)
Suitable for rim brakes only
Supplied with QR skewers and rim tapes
Weight of wheelset only without anything fitted - 1700g
Please note a 7 speed cassette will require a 4mm spacer. Spacer only included if a 7 speed cassette is purchased with the wheels.)

The Fulcrum 2:1 Two-to-One Spoke Ratio is a patented technology that increases the number of spokes in critical areas of a bicycle wheel to improve power transfer and reduce torsion: 

Power transfer
The extra spokes allow two spokes to perform the function of one, which improves power transfer and reduces energy loss. 

Spoke tension
The extra spokes help balance spoke tension between the drive and non-drive sides of the wheel. 

Fatigue life
The improved spoke tension and reduced torsion help extend the fatigue life of the rim, hub, and spokes. 

Slackening and torsion
The extra spokes help limit slackening and torsion in the wheel. 

The 2:1 Two-to-One Spoke Ratio was developed by Fulcrum engineers after observing the results of daily wheel tests. The tests showed that the forces on the spokes and sides of the wheels are different, and that the front and rear wheels have different requirements. For example, the front wheel needs to remain stable while braking, while the rear wheel needs to compensate for the chain side's force.