I'm planning to call ROTOR tomorrow but figured i'd see if anyone here has any experience. i'm dropping my chain when in the small chain ring and on ANY of the top 4 cogs
Setup
2018 Speed Concept
Shimano Di2 FD
ROTOR ALDHU 53/39 ROUND
Road 24 Axle
OF: 143mm Chainline:43.5mm OCP Mount (it just says these on the axle)
11 speed
chain has 300-400 miles on it. not stretched or worn. shimano ultegra chain. Sized properly.
RD is shifting and lined up perfectly.
i'm not using ANY of the spacers they included.
i have adjusted the limit on the FD so when i'm in the small chainring and 28 cog, the chain is slightly resting against the FD to act as protection...and it will still drop. its like the chain misses the chainring before it reaches the FD
when the chain is in 39 chainring and 28 cog, the chainline is not straight. it looks cross chained. it doesn't get a straight chainline until i'm down 4 cogs into the cassette. i'm sure this has something to do with it...but if i crosschain the hell out of it (53/28) it wont drop.
i took it by the trek store here briefly and they said it looked fine and might just be the chainring combination with the bike. it was my understanding that this was the correct.
does anyone have any experience with this? i would appreciate any help!
Merge Multisport Founder & Head Coach
USAT Level 2 - Short & Long Course
Ironman Certified
Brevard, NC
Setup
2018 Speed Concept
Shimano Di2 FD
ROTOR ALDHU 53/39 ROUND
Road 24 Axle
OF: 143mm Chainline:43.5mm OCP Mount (it just says these on the axle)
11 speed
chain has 300-400 miles on it. not stretched or worn. shimano ultegra chain. Sized properly.
RD is shifting and lined up perfectly.
i'm not using ANY of the spacers they included.
i have adjusted the limit on the FD so when i'm in the small chainring and 28 cog, the chain is slightly resting against the FD to act as protection...and it will still drop. its like the chain misses the chainring before it reaches the FD
when the chain is in 39 chainring and 28 cog, the chainline is not straight. it looks cross chained. it doesn't get a straight chainline until i'm down 4 cogs into the cassette. i'm sure this has something to do with it...but if i crosschain the hell out of it (53/28) it wont drop.
i took it by the trek store here briefly and they said it looked fine and might just be the chainring combination with the bike. it was my understanding that this was the correct.
does anyone have any experience with this? i would appreciate any help!
Merge Multisport Founder & Head Coach
USAT Level 2 - Short & Long Course
Ironman Certified
Brevard, NC
Last edited by:
T.Skelton3: Aug 25, 19 8:02