• Get 25c if you've got the clearance.

    Second this.
    Also, don't rely on turbo trainer or rollers. Winter training builds character, plus the cold can bring on a nice euphoria when not climbing. It will soon be spring and all the extra hours spent in the saddle (and in the garage cleaning and greasing) will be worth more on race day over those who got a new bike for Christmas but didn't want to get it dirty.

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