concentricity: IRD, Soma, 7400, s75
04-24-16, 07:30 PM
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concentricity: IRD, Soma, 7400, s75
I have been mostly using old sr road cranks since getting into fg and am getting ready to take the plunge into nicer cranks mostly to address the tight-loose thing that the super secret sheldon method only sorta cures, but also for looks.
I was leaning towards either nos 7400 cranks or the IRD cranks even after my lbs guy started pushing me towards the soma hellyers and offering a pretty solid discount. Then I caught this other thread where y'all are pushing the op to go with sugino 75's. I really do not want to be going past $200 all together to address the issue. Rather than jack that thread...
- are sealed truvativ bb's noticeably non-concentric compared to those expensive track racing bb's?
- are the IRD's, Soma's and vintage road cranks going to still be noticeably out of round compared to actual track cranks from shimano, sugino and campy?
I was leaning towards either nos 7400 cranks or the IRD cranks even after my lbs guy started pushing me towards the soma hellyers and offering a pretty solid discount. Then I caught this other thread where y'all are pushing the op to go with sugino 75's. I really do not want to be going past $200 all together to address the issue. Rather than jack that thread...
- are sealed truvativ bb's noticeably non-concentric compared to those expensive track racing bb's?
- are the IRD's, Soma's and vintage road cranks going to still be noticeably out of round compared to actual track cranks from shimano, sugino and campy?
04-24-16, 07:50 PM
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I got my S75's for a hair less than $200 from AEbike.com fwiw. You can feel an appreciable difference going from nice drivetrain components to really nice drivetrain components in my experience.
Sugino 75 165mm Track Crank Arm Set: Black - AEBike.com
Sugino 75 165mm Track Crank Arm Set: Black - AEBike.com
04-24-16, 07:56 PM
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The IRD Defiant has a really nice finish. I had it before and it had that tight-loose thing. Maybe getting a better chainring would solve it. I had a used SG75 before and it had a bit of loosening in some spots but it was barely noticeable unlike the IRDs. In the end, once you get going you wouldn't feel it.
