Last week preparing my bike for a tri I replaced the cassette and chain. Took the bike for a 30 min spin and ran through all gears -- no problems.
Race day: 30 mins into sprint bike, climbing a hill I shift from the big ring to the little ring and the chain is spinning freely on the rear cogs. I quickly shifted back into the big ring then back down: same thing, but I noticed the rear derailleur was snapping around quite a bit during the shifts. So I shifted back into the big ring and stayed there for the remainder of the race.
The chain is the exact length of the original chain -- the only reason I replaced it is that one of the outer link brackets was coming loose (or looked bent, whatever). I ran through all gears on the bike rack and during a ride, so derailleur adjustments seemed ok.
Any thoughts?
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Note to self: increase training load.
Race day: 30 mins into sprint bike, climbing a hill I shift from the big ring to the little ring and the chain is spinning freely on the rear cogs. I quickly shifted back into the big ring then back down: same thing, but I noticed the rear derailleur was snapping around quite a bit during the shifts. So I shifted back into the big ring and stayed there for the remainder of the race.
The chain is the exact length of the original chain -- the only reason I replaced it is that one of the outer link brackets was coming loose (or looked bent, whatever). I ran through all gears on the bike rack and during a ride, so derailleur adjustments seemed ok.
Any thoughts?
----------------------------------------------------
Note to self: increase training load.