Quick comparison of the tooth profile, small chainring to large chainring, and you see the difference with the large being worn to a “sharktooth”. Rider crosschains rather than shifting to the small chainring when pushing over hills accelerating the wear.
Wow you found a very old video lol! Yes unfortunately triathletes have poor shifting habits. They stay in the big ring much longer than they should and cross chain often. They would rather grind up our hills here in San Diego at a 30 cadence thinking they would be considered a weak rider if they dropped to the little ring. Another reason this happens is with a 50/34 chainring combination the "big ring" isn't that big so they stay in it too long. If this rider was on a 53/39 crankset then the big ring would be big enough and the little ring would be big enough (39 vs 34) that they wouldn't spin out and think the gearing is too easy. Thanks for watching please consider subscribing!!
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Quick comparison of the tooth profile, small chainring to large chainring, and you see the difference with the large being worn to a “sharktooth”. Rider crosschains rather than shifting to the small chainring when pushing over hills accelerating the wear.
Wow you found a very old video lol! Yes unfortunately triathletes have poor shifting habits. They stay in the big ring much longer than they should and cross chain often. They would rather grind up our hills here in San Diego at a 30 cadence thinking they would be considered a weak rider if they dropped to the little ring. Another reason this happens is with a 50/34 chainring combination the "big ring" isn't that big so they stay in it too long. If this rider was on a 53/39 crankset then the big ring would be big enough and the little ring would be big enough (39 vs 34) that they wouldn't spin out and think the gearing is too easy. Thanks for watching please consider subscribing!!