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We has decades of experience in working with 4130 chrome-moly steel for its bike tube products.

Chrome-moly steels are the work horses of industry world-wide, because of the excellent combination of strength, ductility, workability, and reliability.
Speed one had developed new technology which called “Scuzzi Cr-Mo Spiral” and combined the spiral tubing shape.

The frame's ultimate tensile strength is 700~980 MPa. The RS accommodates Scuzzi spiral which means the frame are 20% lighter and 30% stiffer.
With its Shimano Tiagra drivetrain and GXP shell, plus Cr-Mo fork, the RS delivers the unique ride qualities of steel and race-worthy performance.


 

Item Shimano Tiagra (drop) Shimano Tiagra (flat) Shimano Sora  
FRAMESET
Size Sloping-43, 45, 49 cm / horizontal-50, 52, 54cm Sloping-43, 45, 49 cm / horizontal-50, 52, 54cm horizontal-50, 52, 54cm  
Frame Scuzzi Cr-Mo Spiral Scuzzi Cr-Mo Spiral Scuzzi Spiral  
Fork 3T FUNDA PRO / Speed one Cr-Mo Fork 3T FUNDA PRO / Speed one Cr-Mo Fork Speed one Carbon / Cr-Mo Fork  
Shock N/A N/A N/A  
Headset Token TK121 Token TK121 Token TK121  
Braze on Adapter ø28.6 ø28.6 ø28.6  
Colors Scotch-brite / Rapha Pink Scotch-brite / Rapha Pink Scotch-brite / Rapha Pink  
DRIVETRAIN
Front Derailleur Shimano Tiagra Shimano Tiagra Shimano Sora  
Rear Derailleur Shimano Tiagra Shimano Tiagra Shimano Sora  
Shifter Shimano Tiagra SL Shimano Tiagra BL Shimano Sora SL  
Lever N/A Shimano Tiagra Tektro CL535 CL530  
Brakes Shimano Tiagra Shimano Tiagra Tektro 857AL  
Crankset Shimano Tiagra 50-34T Shimano Tiagra 50-39-30T Shimano Sora 50-39-30T  
BB adapter N/A N/A N/A  
Cassette Shimano CS-HG62-10 11-32T 10sp Shimano CS-HG62-10 11-32T 10sp Shimano CS-HG200-9 11-32T 9sp  
Chain KMC X10 10sp KMC X10 10sp KMC X9 9sp  
COMPONENTS
Handlebar FSA Wing Compact FSA V-Drive FSA V-Drive Flat  
Stem FSA Gossamer FSA Gossamer FSA Gossamer  
Seatpost FSA SL-280 SB20 ø27.2 FSA SL-280 SB20 ø27.2 FSA Gossamer SB20 ø27.2  
Wheel Set AmainT. RCR24 AmainT. RCR24 Amain T. RCR24  
Tires Maxxis Detonator Maxxis Detonator Maxxis Detonator  
Saddle Prologo BK Kappa Prologo BK Kappa Prologo BK Kappa  
Bar Tape/Grip Velo Velo Velo  
Weight(w/o pedal) 9.6 kg(49 cm) 9.8 kg(43 cm) 10.1 kg(54 cm)  
PRP        

 

Specifications are subject to change without notice.Color availability depends on current stock.

The maintenance of steel frame

The charming slim tube, the timeless epic, faithful paddle power, excellent rough road absorption, these steel bike character is too strong temptation for the cyclist to resist. All Speed one bike have complicated electroplating rust treatment when it ship out the factory.