RDの調整はシフターのラチェット位置を1ノッチ分動かして微修正したら11速にまたがる制御がようやく達成できた。段ごとのチェーンの収まり具合を見ていると微妙に偏るところがあるので、シマノとカンパでフリーのピッチが少し違うんじゃないかという気がするのだが、実走では問題を露呈せず切り替わっている。
むしろ問題はFDで、ChorusのFDはインナー側の壁に膨らみがあって、Q-Ringsアウターの径がしぼむところはどうしてもそこにチェーンが当たってしまう。トップから4枚目で当たり始め、以下は擦り通し。アウターへのシフトもデリケートなため、これ以上内側に逃げることも出来ない。カンパ党でQ-ringsの人達はどうしてるんだろう?この組合せで異音発生を追い込むのが無理なら、アウターを真円50Tに戻すか、FDをシマノに戻すのが無難ということになるが、FD-7900はとっくに処分済みだよ。
と言うことでアウターはケンタウルの50Tに戻した。ノイズ、シフトともこちらの方が遙かに正常で精神衛生上も好ましい。
RD adjustment is done with the fine-tuning of the ratchet wheel positioning by a notch, and I have achieved managing the entire 11-speed shifts. The sitting of the chain with each freewheel step seems to indicate some tendency of offset in a few steps, and it made me to wonder if the pitch width of freewheels could be slightly different between Shimano and Campy, but the shifting action in the actual running showed no practical problems.
RD adjustment is done with the fine-tuning of the ratchet wheel positioning by a notch, and I have achieved managing the entire 11-speed shifts. The sitting of the chain with each freewheel step seems to indicate some tendency of offset in a few steps, and it made me to wonder if the pitch width of freewheels could be slightly different between Shimano and Campy, but the shifting action in the actual running showed no practical problems.
More concerned is FD in my case: The inner
side plate of Campy Chorus FD is lifted toward the drive train in the lower
part, and when the chain goes down as Q-rings diameter shrinks, it inevitably
touches the derailleur plate surface. The fourth wheel from the top starts
contacting and those lower more steadily rub the plate. Because the shifting of
Q-rings is delicate, I cannot move the derailleur inward further. How do those people with Campy/Rotor combination deal with this issue? If the noise
is inevitable in this combination, the choices
are to go back with the round Centaur 50T chain ring or with Shimano FD-7900
derailleur. Well, I already sold my FD-7900 months ago!
So I immediately swapped the outer ring to previous Centaur, and the result was far more relieving in terms of both of shifts and noise.
So I immediately swapped the outer ring to previous Centaur, and the result was far more relieving in terms of both of shifts and noise.
いつも通り国際村往復で試走してみると、結果は驚きの新記録と出た。アプローチは20m13s、登坂が11m08sで、どちらも約1分の短縮で特に登坂部の平均速度が12.75km/hまで跳ね上がっている。試し乗りなので頑張って走ったわけじゃないのにここまで変わるとは!想定通り保険に1枚残して27Tで踏み込んでも重い負荷感がないのはやはり軽量ZIPPホイールの恩恵という以外ない。
The usual test run to Shonan Village brought an amazing result: 20m13s for the approach run and 11m08s for climbing that reduced roughly 1 minute each section. In particular, the average speed of climbing was 12.75km/h to my surprise, and I was not running hard as it was a test! The sense of pushing the second lowest 27T gear was not too demanding, which I really appreciated, and the lightweight ZIPP wheels did add some value here.
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