Q-factor is the same: old dura-ace 146, new dura-ace 146, old ultegra 146.6, new ultegra 146
It only affects chainline a little bit by ≈0.2mm (½×0.3mm±chainrings offset/width changes)
Yes, when using small-small chainrings and OLD=135 new FD/FC can get away with ~5mm shorter chainstay:
(recommendations: ≥410 for R9100, ≥415 for 6800)
Inner chainring (x3) spacing 0.3mm closer to bb (37.8 vs 38.1):
(chainline=0.5*(x2+x3+chainring); width≈chain 2/32"≈2.4mm)
Code: Select all
Model Gear Chain-line x1(mm) x2(mm) x3(mm) x4(mm) x5(mm) x6(mm) x7(mm)
FC-R9100 * 55-42T 43.5 - 46.0 37.8 36.3 35.4 56.4 56.4
FC-R9100 * 54-42T 43.5 - 46.0 37.8 36.3 35.4 56.4 56.4
FC-R9100 * 53-39T 43.5 - 46.0 37.8 36.3 35.4 56.4 56.4
FC-R9100 * 52-36T 43.5 - 46.0 37.8 36.3 35.4 56.4 56.4
FC-R9100 * 50-34T 43.5 - 46.0 37.8 36.3 35.4 56.4 56.4
FC-6800 53-39T 43.5 - 46.0 38.1 37.1 35.9 57.7 57.7
FC-6800 52-36T 43.5 - 46.0 38.1 37.1 35.9 57.7 57.7
FC-6800 50-34T 43.5 - 46.0 38.1 37.1 35.9 57.7 57.7
FC-6800 46-36T 43.5 - 46.0 38.1 37.1 35.9 57.7 57.7
FC-5800 53-39T 43.5 - 46.0 38.1 37.9 35.9 57.0 57.8
FC-5800 52-36T 43.5 - 46.0 38.1 37.9 35.8 57.0 57.8
FC-5800 50-34T 43.5 - 46.0 38.1 37.9 35.8 57.0 57.8
FC-RS500 52-36T 43.5 - 45.9 38.0 - 36.5 58.6 60.2
FC-RS500 46-36T 43.5 - 45.9 38.0 - 36.5 58.6 60.2
FC-RS510 * 50-34T 43.5 - 46.0 37.8 - 35.6 58.9 59.9
FC-U5000-2 46-32T 43.5 - 46.0 38.1 - - 62.7 63.0
Code: Select all
Model Gear Chain-line y1(mm) y2(mm) y3(mm) y4(mm) y5(mm) y6(mm) y7(mm)
FC-R9100 * 55-42T 43.5 - 113.1 88.2 46.9 80.2 195.5 195.5
FC-R9100 * 54-42T 43.5 - 111.1 88.2 46.9 80.2 195.5 195.5
FC-R9100 * 53-39T 43.5 - 109.1 82.2 46.9 74.2 195.5 195.5
FC-R9100 * 52-36T 43.5 - 107.1 76.1 46.9 68.2 195.5 195.5
FC-R9100 * 50-34T 43.5 - 103.0 72.1 46.9 64.0 195.5 195.5
FC-6800 53-39T 43.5 - 109.1 82.2 46.4 74.2 191.9 191.9
FC-6800 52-36T 43.5 - 107.1 76.1 46.4 68.2
FC-6800 50-34T 43.5 - 103.0 72.1 46.4 64.2
FC-6800 46-36T 43.5 - 95.4 76.1 46.4 68.2
FC-5800 53-39T 43.5 - 109.1 82.2 46.4 74.2 192.7 192.7
FC-5800 52-36T 43.5 - 107.1 76.1 46.4 67.8
FC-5800 50-34T 43.5 - 103.0 72.1 46.4 64.0
FC-RS500 52-36T 43.5 - 107.1 76.1 - 68.2 192.8 192.8
FC-RS500 46-36T 43.5 - 95.4 76.1 - 68.2
FC-RS510 * 50-34T 43.5 - 103.0 72.1 - 64.2 193.4 193.4
FC-U5000-2 46-32T 43.5 - 94.9 68.1 - - 192.6 192.4