B Series
Origin
The B is one of triathlon's most legendary badges — a symbol of dedication among devoted age-group racers. Its frame lineage runs straight back to the original Felt DA, the brand's flagship time-trial bike: the B inherited the aero seat tube, the super-slim down tube with wheel-hugging cutouts, and the trademark rear brake tucked into a seat-tube cutout just above the bottom bracket, out of the wind. Positioned as the accessible end of Felt's tri range, the B brought genuine aero pedigree to middle-of-the-pack competitors.
Specifications
- Frame
- Carbon aero frame derived from the original Felt DA flagship; aero seat tube and slim wheel-hugger down-tube cutouts to reduce drag
- Drivetrain
- Shimano Ultegra / 105 (build-dependent); 53/39 crank with 11-25 cassette on classic builds
- Brakes
- Aero rim brakes — rear brake hidden in a seat-tube cutout just above the bottom bracket for clean airflow
- Wheels
- 700c; aero wheelsets on higher builds (e.g. TTR2 alloy aero on the B2)
The verdict
- Real aero pedigree inherited from Felt's flagship DA platform
- Hidden rear brake and wheel-hugger tube shaping cut drag
- An accessible, value-focused way into a true triathlon bike
- Aggressive TT fit isn't comfortable for general riding
- Aero rim brakes lag behind modern disc setups
- Integrated/hidden brake makes maintenance fiddly
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