Lami·Flow R4-91 unique design creates a laminar flow to reduce drag, with the air passing through the interior and exterior of the chainring, helping you to keep your momentum, while retaining the legendary stiffness of Ridea chainrings.
Lami·Flow R4-91 is available for double and single ring setups. Double chainrings are designed with multiple chain bridges to maximize front derailleur performance, while single chainrings use the exclusive X-ODON technology to prevent chain sucks and increase the stability of the chain.
CHARACTERISTICS:
Model name: Ridea Lami·Flow R4-91
Material: Full CNC Swiss AL 7075-T7651
BCD: 110 mm (4 bolts)
Compatible cranksets: Ridea ES SPM2-R4, IT SPM2-R4, ES R4-91, IT R4-91. Shimano R91xx/80xx/7000 & 90xx/68xx/5800 and other Shimano 110 mm compatible cranks
Powering levels: W0T (round rings); W2T duo-oval (+10% output power); W3T duo-oval (+15% output power)
X-ODON Technology: Designed to retain the chain under all conditions (single chainrings only)
Size and weight:
Single:
W0T: 50t (113 g); 52t (121 g); 54t (131 g); 56t (141 g)
W2T: 34t (46 g); 36t (59 g); 38t (65 g); 40t (73 g); 42t (81 g); 44t (95 g)
W3T: 46t (94 g); 48t (100 g); 50t (116 g); 52t (123 g); 54t (131 g); 56t (140 g)
W3T (inset 3 mm): 46t (105 g); 48t (115 g); 50t (130 g)