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  • I'm a bit irritated. How can the effective top tube length be larger than the actual length?
    Also would you split the 17t EAI cog?

  • How can the effective top tube length be larger than the actual length?

    Because it slopes down a little. If you measured horizontally from the front of the top tube to the seat tube, you would be on the seat tube or seatpost, above the top tube. This is a bit further away

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