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.)
Fulcrum’s 2:1 Two-to-One Spoke Ratio is a patented wheel-building technology that increases the number of spokes in the most highly stressed sections of a bicycle wheel. By doubling the spokes in critical zones, the system improves efficiency, durability, and stability.
Power Transfer
By placing twice as many spokes where torque is highest, two spokes can share the workload normally carried by one. This improves power transfer from rider to wheel and reduces energy loss under load.Spoke Tension
The 2:1 layout helps equalize tension between the drive-side and non-drive-side spokes. Balanced tension enhances wheel stability and reduces the tendency for wheels to go out of true.Fatigue Life
More uniform spoke tension and reduced torsional stress increase the fatigue life of the rim, hub, and spokes. The wheel structure maintains its integrity longer under repeated cycling forces.Slackening and Torsion Control
Doubling spokes in key areas limits spoke slackening and minimizes torsion, helping the wheel stay responsive and stiff during acceleration and cornering.Engineering Insight
Fulcrum developed the 2:1 system after extensive daily wheel testing revealed significant differences in the forces acting on each side of a wheel. The front and rear wheels also face different stress profiles:
Front wheels must remain stable under braking loads.Rear wheels must counteract the high torque applied on the chain side.By tailoring spoke count to these asymmetric loads, the 2:1 system maximizes performance and reliability.
