Global CDEM algorithm, from [12]. With T_s,j:, α_s,t,j:, n_j, global variables, respectively slack tension, angle between a chain strand and the closest link with both rollers contacting spocket j (with j = I, II for chainring and rear cog) and contact number of rollers T_i, P_i, s_c,r,i, κ_i, ν_i local variables, respectively link tension, roller contact force, curvilinear abscissa of roller, angle between the direction of the preceding link and the local x axis and the angle between the direction of the following link and the local x axis et k drive sub-position for efficiency calculation.