CeramicSpeed BB92 MTB Bottom Bracket - 24mm Spindle Coated Races Black CheckoutTitle=KS E20-i Dropper Seatpost - 27.2mm which is important as changeable

which is important as changeable conditions are often encountered over the course of marathon races

Model Riddler Size 700c Width 45mm Casing TCS Light SG TPI 120 Compound Dual DNA Fast Rolling Bead Folding Type Tubeless Color Black/Tanwall Weight -

Kick shift between gears without shifters or cables

Banjo Bolt And Seals

100% Surly 4130 Chromoly steel frame and fork

CeramicSpeed BB92 MTB Bottom Bracket - 24mm Spindle Coated Races Black CheckoutTitle=KS E20-i Dropper Seatpost - 27.2mm which is important as changeableThe CeramicSpeed BB92 bottom bracket offers bearings with extremely low friction improved power transfer and a service life that far exceeds traditional steel bearings. Bottom Bracket Shell I. D. 41 BB Frame Interface BB89. 5 BB Shell Width (mm) 89. 5 Weight 60 Spindle Interface Type Shimano Hollowtech II Defined Color Black Spindle 24Mm Spindle