ooops ! Io avevo letto del ratio su Art Cyclery's ; ma se dici di no mi sarò sicuramente sbagliato
La tabella che avevo è questa
Cable Pull/Derailleur Ratio/Calculated Cog Pitch/Measured Cog Pitch/Percent Difference
Shimano 6 3.2 1.7 5.44 5.50 1.10
Shimano 7 2.9 1.7 4.93 5.00 1.41
Shimano 8 2.8 1.7 4.76 4.80 0.84
Shimano 9
2.5 1.7 4.25 4.35 2.33
Shimano 10 Road
2.3 1.7 3.91 3.95 1.02
Shimano 10 Mountain 3.4 1.2 4.08 3.95 3.24
Shimano 11 Road 2.7 1.4* 3.69
Shimano 11 Mountain 3.6 1.1* 3.90
Campagnolo 8 3.5 1.4 4.90 5.00 2.02
Campagnolo old 9 3.2 1.4 4.48 4.55 1.55
Campagnolo new 9 3.0 1.5 4.50 4.55 1.10
Campagnolo 10 2.8 1.5 4.20 4.15 1.20
Campagnolo 11 2.6 1.5 3.90 3.76 3.66
SRAM (1:1) 7 Mountain 4.5 1.1 4.95 5.00 1.01
SRAM (1:1) 8 Mountain 4.3 1.1 4.73 4.80 1.47
SRAM (1:1) 9 Mountain 4.0 1.1 4.40 4.35 1.14
SRAM (Exact Actuation) 10 Road/Mountain 3.1 1.3 4.03 3.95 2.01
SRAM (Exact Actuation) 11 Road 3.1 1.3 4.03 3.72 2.01
SRAM (X-Actuation) 11 Mountain 3.5 1.12 3.90 3.90 0.06